Dhanlaxmi Steel Distributors

• High Yield Strength: Resists permanent deformation under stress.
• Excellent Resilience & Elasticity: Stores and releases mechanical energy effectively.
• Good Fatigue Resistance: Withstands repeated loading and unloading cycles.
• Flexibility: Can be formed into various spring shapes.
• High Carbon Content: (0.50% to 1.20% typical) essential for hardness and strength.
• Alloyed for Performance: Manganese, silicon, and vanadium can be added for enhanced properties.
• Heat Treated: Hardening (heating & rapid cooling) and tempering (reheating at lower temp) balance hardness with toughness. 

1. Annealing: Relieves internal stresses after hot rolling, making steel workable.
2. Hardening: Heats steel above critical temperature and quenches it rapidly to increase hardness.
3. Tempering: Reheats the hardened steel to a lower temperature to improve ductility and reduce brittleness.
4. Cold Rolling: Further processing for precise thickness, dimensions, and surface finish. 

• High Carbon Grades: C62, C67S, C75, C80, C98 (increasing carbon for greater hardness).
• Alloyed Grades: 51CrV4, 80CrV2 (containing vanadium for enhanced strength). 

• Automotive: Clutch assemblies, horns, valve plates.
• Industrial: Blades, compressor valves, binder clips, electrician's fish tape.
• Electronics: Electrical switches, relays, clock springs.
• Measurement: Various measuring devices. 

• Material: Made from high-carbon spring steel (like SAE 1075 or 1095) that is heat-treated for increased hardness and strength.
• Form: Thin, flat, or sometimes tapered metal pieces, available in coils or sheets.
• Properties:
  • Hardness & Durability: Can withstand heavy loads and long-term wear.
  • Flexibility & Elasticity: Capable of being formed and recovering its shape without losing integrity.
  • Precision: Manufactured to tight tolerances for accurate spacing and adjustments. 

• Gap Filling: Fills small spaces between objects to achieve a precise fit.
• Alignment: Corrects misalignment to ensure components are properly aligned.
• Leveling: Creates a level surface between uneven parts.
• Spacing: Provides consistent spacing between parts to prevent wear or damage.
• Support: Adds support to components under load. 

• Machinery & Engines: Used in valve springs for proper engine tension and to prevent valve float.
• Construction & Cabinetry: For leveling, securing, and achieving precise fits.
• General Assembly: In any application requiring precise adjustments, spacing, or stabilization of parts. 

• Accuracy: Ensures precise adjustments and stable, secure installations.
• Cost-Effective: Offers an economical solution for critical repairs and alignments.
• Longevity: Its durable nature withstands harsh conditions and repeated use

• Material Composition: High carbon content with chromium for improved hardenability.
• Mechanical Properties: Exceptional toughness, ductility, and fatigue resistance.
• Finish: Typically hot-rolled with a black finish, though other finishes may be available.
• Availability: Comes in various widths, thicknesses, and lengths, often customizable. 

• Automotive & Heavy Equipment: Leaf springs for trucks, trailers, and tractors.
• Industrial: Various heavy-duty spring applications and machinery parts.
• Blades: Swords, large knives, survival knives, and competition choppers due to its flexibility and durability. 

• Machinability & Weldability: Can be challenging to weld and machine, often requiring special procedures.
• Corrosion: Susceptible to rust, so protective coatings are recommended. 

• Material: High-carbon alloy spring steel.
• Standard: Complies with Japanese Industrial Standards (JIS) G4801.
• Tensile Strength: High, typically ranging from 1000 to 2000 MPa.
• Workability: Can be shaped by blanking, bending, drawing, extrusion, and swaging.
• Heat Resistance: Designed to work effectively at temperatures up to 400°C.
• Dimensional Precision: Allows for closer tolerances and improved finish. 

• Springs: Engine valve springs, spiral springs, and other crucial springs.
• Elastic Parts: High-performance elastic components.
• High-Strength Components: Various parts requiring excellent durability and resilience. 

• Durability: Excellent resistance to wear and deformation under stress.
• Versatility: Usable in a wide array of demanding manufacturing and construction contexts.
• Performance: Retains its elastic properties under elevated temperatures

• Material: SUP10 is an alloy-added spring steel, often specified by the JIS G4801 standard.
• Form: It's a flat bar, a common rolled steel product with a rectangular cross-section.
• Properties:
  • High Strength & Toughness: Provides durability under heavy loads.
  • Excellent Fatigue Resistance: Crucial for parts that undergo repeated stress cycles.
  • Good Hardenability & Plasticity: Allows for effective heat treatment and shaping.
  • Shock & Vibration Resistance: Suitable for parts subjected to impact.
  • Strong Elasticity: Essential for spring applications.
• Condition: Usually provided as-rolled, but can be oil-quenched and tempered for improved wear resistance. 

• Automotive Suspensions: A primary use for leaf springs and stabilizer bars.
• Coil Springs: Used where high strength and elastic recovery are needed.
• Other Spring Components: For parts exposed to stress, vibration, and shock. 

• Material: High-carbon alloy spring steel (similar to 55CrMnA, 55Cr3, ASTM 5155).
• Properties: Good elasticity, high strength, ductility, toughness, and good resistance to permanent deformation.
• Hardenability: High, allowing for effective hardening through oil quenching and tempering.
• Supplied Condition: Typically supplied in an annealed state with low hardness (under 250HB).
• Heat Treatment: Requires heat treatment (oil quenching and tempering) to achieve its final spring properties. 

• Automotive: Heavy-duty leaf springs, helical springs, and sway bars for vehicles and tractors.
• Industrial: Large plate springs and other vital springs for industrial production and heavy loads. 

• Superior Strength: Maintains high strength and elasticity under heavy stress.
• Good Performance: Excellent balance of hot working, mechanical properties, and decarburization resistance.
• Durability: High resistance to fatigue and permanent deformation. 

• 55CrMnA
• 55Cr3
• SAE 5155 / ASTM 5155 

• Material: High-carbon alloy spring steel.
• Standard: Complies with Japanese Industrial Standards (JIS) G4801.
• Tensile Strength: High, typically ranging from 1000 to 2000 MPa.
• Workability: Can be shaped by blanking, bending, drawing, extrusion, and swaging.
• Heat Resistance: Designed to work effectively at temperatures up to 400°C.
• Dimensional Precision: Allows for closer tolerances and improved finish. 

• Springs: Engine valve springs, spiral springs, and other crucial springs.
• Elastic Parts: High-performance elastic components.
• High-Strength Components: Various parts requiring excellent durability and resilience. 

• Durability: Excellent resistance to wear and deformation under stress.
• Versatility: Usable in a wide array of demanding manufacturing and construction contexts.
• Performance: Retains its elastic properties under elevated temperatures

• Material: Silicon-alloyed spring steel.
• Manufacturing: Hot-rolled, sometimes with a black surface.
• Properties:
  • High strength and toughness.
  • Excellent elasticity and ability to return to original shape.
  • Good hardenability and plastic properties.
  • Good resistance to relaxation and fatigue.
  • Good temper resistance.
• Common Deliveries: Available in specific conditions like +S (quenched and tempered) for high performance. 

• Springs: Used for spiral springs, flat springs, bumper springs, and vehicle springs.
• Automotive: Components for automotive and railway industries.
• Machinery: Gears, shafts, crankshafts, and other heavily stressed components. 

• Standards: Often conforms to DIN 17222 or is equivalent to EN45 or SUP9/SUP9A in terms of application.
• Mechanical Properties: Typically exhibits high tensile strength (e.g., 1450 - 1750 MPa) and a high yield point. 

• Material Type: High-quality, high-carbon alloy spring steel.
• Chemical Composition (approximate): 0.52-0.60% Carbon (C), 0.65-0.95% Manganese (Mn), 0.15-0.35% Silicon (Si).
• Hardness: Achieves 28-34 HRC after heat treatment; delivered in an annealed state with hardness less than 250HB.
• Mechanical Strengths: High yield strength and ultimate tensile strength (UTS), good toughness, and elasticity. 

• Excellent Elasticity: Designed to withstand elastic deformation without permanent set after load removal.
• Good Hardenability: Responds well to heat treatment (quenching and tempering) to achieve optimal spring properties.
• High Strength & Toughness: Provides resistance to stress and impact.
• Good Plasticity & Machinability: Can be formed and machined effectively before final heat treatment. 

• Automotive: Widely used for leaf springs in trucks and other vehicles.
• Agricultural Machinery: Used for various springs in farm equipment.
• Other Elastic Components: Suited for any application requiring strong elastic recovery. 

• Hot Rolled: Processed through hot rolling, resulting in a flat bar with a rectangular cross-section.
• Edges: Available with square or rounded edges. 

• Surface Finish: Exhibits a smooth, polished, and lustrous "bright" appearance, denoted by the symbol 'B'.
• Dimensional Accuracy: Tighter tolerances than hot-rolled steel due to processing at lower temperatures.
• Strength & Hardness: Work hardening during cold rolling increases its mechanical strength and hardness.
• Ductility: Can be improved through optional annealing to relieve internal stresses. 

1. Starting Material: Begins with a hot-rolled steel coil or sheet.
2. Pickling: Acid treatment removes surface contaminants and scale.
3. Cold Rolling: The cleaned steel passes through smooth rollers at room temperature to reduce thickness and enhance surface finish.
4. Bright Annealing/Skin Pass: Bright annealing (controlled heating and cooling) or skin passing (light rolling) further refines the surface and adjusts mechanical properties. 

• Automotive components
• Appliances and other visibly finished goods
• Multi-purpose applications requiring good surface quality and precision
• Spring steel applications 

• Aesthetic Appeal: The bright finish is suitable for exposed parts.
• Enhanced Strength: Stronger and harder than hot-rolled steel.
• Precise Dimensions: Offers greater accuracy and reduced warping. 

• Relieves Internal Stresses: Cold rolling creates internal stress in steel, making it brittle. Annealing relieves these stresses.
• Improves Ductility & Formability: The process makes the steel softer and more pliable, allowing it to be bent, formed, and cut without cracking.
• Refines Grain Structure: Heating and cooling allow new, strain-free grains to form, leading to a more uniform and refined microstructure.
• Enhances Machinability: Softer steel is easier to cut and machine.
• Improves Surface Quality: Essential for applications requiring good surface characteristics. 

1. Heating: The steel coil is heated to a specific temperature, known as the recrystallization temperature, where new grains form.
2. Soaking: The steel is held at this temperature for a sufficient time to allow structural changes, such as impurity reduction and crystal lattice repair, to occur.
3. Cooling: The coil is then cooled slowly within the furnace to preserve the refined structure, or sometimes more quickly to lock in specific properties. 

• Batch (Box) Annealing: Multiple coils are stacked, covered, and heated in a controlled atmosphere to prevent oxidation, followed by slow cooling over several days.
• Continuous Annealing: Coils are uncoiled and run through a furnace, with precise temperature and cooling rate control to achieve desired properties, often as part of a coating line.
• Open Coil Annealing: Loosely wound coils allow atmosphere to circulate for processes like decarburization. 

Spring steel refers to steel due to the elasticity in the quenched and tempered condition, and specifically for the manufacture of springs and elastic components. The elasticity of steel depends on its ability to elastically deform, that is, within the specified range, the ability to elastically deform it to withstand a certain load, and no permanent deformation occurs after the load is removed.

• High Yield Strength: Resists permanent deformation under stress.
• Excellent Resilience & Elasticity: Stores and releases mechanical energy effectively.
• Good Fatigue Resistance: Withstands repeated loading and unloading cycles.
• Flexibility: Can be formed into various spring shapes.
• High Carbon Content: (0.50% to 1.20% typical) essential for hardness and strength.
• Alloyed for Performance: Manganese, silicon, and vanadium can be added for enhanced properties.
• Heat Treated: Hardening (heating & rapid cooling) and tempering (reheating at lower temp) balance hardness with toughness. 

1. Annealing: Relieves internal stresses after hot rolling, making steel workable.
2. Hardening: Heats steel above critical temperature and quenches it rapidly to increase hardness.
3. Tempering: Reheats the hardened steel to a lower temperature to improve ductility and reduce brittleness.
4. Cold Rolling: Further processing for precise thickness, dimensions, and surface finish. 

• High Carbon Grades: C62, C67S, C75, C80, C98 (increasing carbon for greater hardness).
• Alloyed Grades: 51CrV4, 80CrV2 (containing vanadium for enhanced strength). 

• Automotive: Clutch assemblies, horns, valve plates.
• Industrial: Blades, compressor valves, binder clips, electrician's fish tape.
• Electronics: Electrical switches, relays, clock springs.
• Measurement: Various measuring devices. 

• Material: High-carbon alloy spring steel (similar to 55CrMnA, 55Cr3, ASTM 5155).
• Properties: Good elasticity, high strength, ductility, toughness, and good resistance to permanent deformation.
• Hardenability: High, allowing for effective hardening through oil quenching and tempering.
• Supplied Condition: Typically supplied in an annealed state with low hardness (under 250HB).
• Heat Treatment: Requires heat treatment (oil quenching and tempering) to achieve its final spring properties. 

• Automotive: Heavy-duty leaf springs, helical springs, and sway bars for vehicles and tractors.
• Industrial: Large plate springs and other vital springs for industrial production and heavy loads. 

• Superior Strength: Maintains high strength and elasticity under heavy stress.
• Good Performance: Excellent balance of hot working, mechanical properties, and decarburization resistance.
• Durability: High resistance to fatigue and permanent deformation. 

• 55CrMnA
• 55Cr3
• SAE 5155 / ASTM 5155 

• Material: A specific type of spring steel, often conforming to JIS standards, known for its resilience and toughness.
• Shape: Flat, with a rectangular cross-section and dimensions varying in thickness and width to suit different applications.
• Properties:
  • High Yield Strength: The ability to deform significantly and return to its original state.
  • Good Hardenability: Can be effectively heat-treated to achieve desired mechanical properties.
  • Elasticity: Its primary function is to absorb energy and spring back into shape.
• Manufacturing: Typically produced through hot rolling. 

• Automotive: Leaf springs for heavy vehicles and industrial machinery.
• Industrial: Large plate springs, helical springs, and other elastic components under high stress.
• Machinery: Components for chains and various other machinery requiring resilience. 

• 60Si2Mn (Chinese GB standard)
• 61SiCr7 (European DIN standard)

• High Elasticity: Can undergo significant bending or twisting and reliably return to its original shape.
• Strength & Resilience: Features a high strength-to-elasticity ratio, ensuring consistent performance.
• Silicon Content: The silicon enhances the elastic limit and reduces energy loss during cyclic loading.
• Temper Resistance: Exhibits good resistance to tempering.
• Applications: Used for spiral springs, butterfly springs, air seal springs, vehicle springs (leaf and coil), and other elastic parts in high-pressure, high-deformation environments. 

• Material Type: Alloy Spring Steel.
• Key Elements: Contains silicon (Si) and manganese (Mn) for its spring properties.
• Equivalent Standards: Also known by DIN 1.5026 and sometimes compared to ASTM standards like ASTM 9255/55Si2Mn2/SUP6. 

• High Yield Strength: Resists permanent deformation under stress.
• Excellent Resilience & Elasticity: Stores and releases mechanical energy effectively.
• Good Fatigue Resistance: Withstands repeated loading and unloading cycles.
• Flexibility: Can be formed into various spring shapes.
• High Carbon Content: (0.50% to 1.20% typical) essential for hardness and strength.
• Alloyed for Performance: Manganese, silicon, and vanadium can be added for enhanced properties.
• Heat Treated: Hardening (heating & rapid cooling) and tempering (reheating at lower temp) balance hardness with toughness. 

1. Annealing: Relieves internal stresses after hot rolling, making steel workable.
2. Hardening: Heats steel above critical temperature and quenches it rapidly to increase hardness.
3. Tempering: Reheats the hardened steel to a lower temperature to improve ductility and reduce brittleness.
4. Cold Rolling: Further processing for precise thickness, dimensions, and surface finish. 

• High Carbon Grades: C62, C67S, C75, C80, C98 (increasing carbon for greater hardness).
• Alloyed Grades: 51CrV4, 80CrV2 (containing vanadium for enhanced strength). 

• Automotive: Clutch assemblies, horns, valve plates.
• Industrial: Blades, compressor valves, binder clips, electrician's fish tape.
• Electronics: Electrical switches, relays, clock springs.
• Measurement: Various measuring devices. 

Specifications:

• Material: Alloy spring steel (typically a high carbon steel with silicon and manganese).
• Form: Hot-rolled flat bar, meaning it's produced by rolling steel at high temperatures into a flat, rectangular shape.
• Properties: High tensile strength, excellent elasticity, good hardenability, good plasticity, and superior fatigue resistance.
• Key Alloying Elements: Silicon (Si) and Manganese (Mn) are crucial for enhancing elasticity and strength. 

• Springs: Ideal for various types of springs, including coil springs, disc springs, flat springs, and bumper springs.
• Automotive: Used in vehicle components such as leaf springs, suspension systems, and other resilient parts.
• Machinery: Found in heavily stressed components like gears, shafts, crankshafts, and other high-performance parts.
• Railways: Utilized for springs in locomotives and wagons. 

• Hot Rolling: The primary manufacturing technique, producing a base material that can then be further treated.
• Heat Treatment: Can be heat-treated (quenched and tempered) to achieve specific mechanical properties, such as increased hardness and wear resistance. 

• Durability: Its properties make it suitable for applications that experience repeated stress and strain.
• Versatility: Can be engineered to meet

• Chemical Composition: Approximately 0.50-0.60% Carbon (C), with balanced Manganese and Silicon.
• Carbon Steel Grade: C55 is a specific medium carbon steel grade, similar to SAE 1050/1055 or EN-9.
• Hardness: Can be supplied in a soft, annealed state (around 160-200 BHN) for easy forming or in a hardened & tempered state (up to 48-52 HRC) for high strength and durability.
• Processing: Typically cold-rolled to achieve tight dimensional tolerances, a smooth surface finish, and enhanced grain structure.
• Mechanical Properties: Offers high tensile strength, excellent elastic limits, and good fatigue resistance, allowing parts to return to their original shape after deformation. 

• Annealed: Soft and ductile, ideal for stamping, bending, and machining into desired shapes before final heat treatment.
• Hardened & Tempered (H&T): Pre-treated for high hardness and strength, suitable for direct use in spring applications. 

• Automotive: Washers, various types of springs, clips.
• Industrial: Blades, tools, springs for machinery, forming dies.
• Consumer Goods: Pen clips, hangers, measuring tapes. 

• Form: Available in coils, strips, and sheets.
• Edges: Can be supplied with mill, sheared, or round edges.
• Surface Finish: Available in bright, polished, or grey finishes. 

• Superior Surface Finish: No scale or pits form during cold rolling, resulting in a smooth, clean surface.
• Tighter Tolerances: Greater dimensional accuracy in thickness and width.
• Increased Strength: Strain hardening during cold working makes it stronger (up to 20%) and harder than hot-rolled steel.
• Improved Formability: Can be engineered for specific ductility levels, with optional annealing to relieve internal stresses.
• Consistent Quality: Uniform thickness and shape across the strip. 

1. Start with Hot-Rolled Coil: A hot-rolled steel coil is used as the base material.
2. Pickling: The coil is cleaned with acid to remove surface rust and scale.
3. Cold Rolling: The cleaned strip passes through rollers at room temperature to reduce its thickness and increase its length.
4. Annealing (Optional): The strip may be heated and slowly cooled to relieve stresses and improve ductility.
5. Skin Pass (Optional): A final light rolling pass to refine the surface finish and remove imperfections.
6. Slitting: The strip is then cut to the required width. 

• Automotive Industry: Structural components, body panels.
• Appliances: Durable and aesthetically pleasing casings and parts for household goods.
• Furniture: Office and storage furniture.
• Precision Tubes & Pipes: For applications requiring tight dimensions.
• Construction: Roof and wall systems, steel racks. 

• High Yield Strength: Resists permanent deformation under stress.
• Excellent Resilience & Elasticity: Stores and releases mechanical energy effectively.
• Good Fatigue Resistance: Withstands repeated loading and unloading cycles.
• Flexibility: Can be formed into various spring shapes.
• High Carbon Content: (0.50% to 1.20% typical) essential for hardness and strength.
• Alloyed for Performance: Manganese, silicon, and vanadium can be added for enhanced properties.
• Heat Treated: Hardening (heating & rapid cooling) and tempering (reheating at lower temp) balance hardness with toughness. 

1. Annealing: Relieves internal stresses after hot rolling, making steel workable.
2. Hardening: Heats steel above critical temperature and quenches it rapidly to increase hardness.
3. Tempering: Reheats the hardened steel to a lower temperature to improve ductility and reduce brittleness.
4. Cold Rolling: Further processing for precise thickness, dimensions, and surface finish. 

• High Carbon Grades: C62, C67S, C75, C80, C98 (increasing carbon for greater hardness).
• Alloyed Grades: 51CrV4, 80CrV2 (containing vanadium for enhanced strength). 

• Automotive: Clutch assemblies, horns, valve plates.
• Industrial: Blades, compressor valves, binder clips, electrician's fish tape.
• Electronics: Electrical switches, relays, clock springs.
• Measurement: Various measuring devices. 

• Type: Martensitic Stainless Steel
• Machinability: Superior, often cited as the best among stainless steels, thanks to added sulfur.
• Hardening: Can be heat-treated (hardened and tempered) to achieve high strength and hardness.
• Corrosion Resistance: Lower than austenitic grades (like 304) but suitable for mild environments, fresh water, and steam.
• Strength: Good strength and toughness, especially in its hardened and tempered condition.
• Other Properties: Excellent non-seizing and non-galling characteristics. 

• Automatic screw machine parts
• Motor parts, pumps, and valves
• Nuts, bolts, and studs
• Gears and other extensively machined components 

• High Carbon Content: Typically ranges from 0.60% to 1.00%, granting it superior hardness and strength.
• High Elastic Limit: Can be bent significantly and still return to its original form without permanent deformation.
• Hardness & Tensile Strength: Offers high resistance to wear and a substantial capacity to withstand pulling forces.
• Elasticity & Ductility: Possesses good flexibility and a high elongation at fracture, though it is more brittle than low or medium carbon steels.
• Hardenability: Can be hardened and tempered through heat treatment to achieve desired strength levels. 

• Carbon: The primary element responsible for hardness.
• Manganese: Aids in deoxidation and improving strength.
• Silicon, Chromium, Vanadium, Molybdenum, Nickel: These elements enhance toughness, strength, and the elastic limit. 

• Springs: Used in various automotive components like suspension systems, and general-purpose mechanical applications.
• Tools & Blades: Found in hand tools, knife blades, and high-strength wires where toughness is crucial. 

• C55S, C60S, C75S, C100S: Grades indicating carbon content (e.g., C60 has 0.60% carbon).
• 51CrV4 (or 5160H): A high-carbon chromium alloy steel, noted for its use in springs. 

• Composition: Primarily iron and carbon, with other elements present only in specified, limited amounts.
• Strength & Hardness: Strength and hardness increase with carbon content, while ductility decreases.
• Heat Treatability: High-carbon variants can be hardened through heat treatment, enhancing their strength and wear resistance.
• Corrosion: More susceptible to rust and corrosion compared to stainless steels. 

• Low Carbon Steel Strips: Soft, ductile, and easily formable, often used in general-purpose applications.
• Medium Carbon Steel Strips: (0.30–0.69% carbon) A balance of strength and ductility, suitable for forging and automotive components.
• High Carbon Steel Strips: (Above 0.70% carbon) Extremely strong, hard, and wear-resistant, ideal for springs, tools, and blades. 

• Cold Rolled: Offers a smooth surface finish, consistent thickness, and enhanced strength, suitable for precision parts.
• Hot Rolled: A process that can also produce carbon steel strips with varying properties.
• Finishes: Available in different surface appearances (e.g., rough, matte, glossy) and thickness/width tolerances (e.g., normal, precision). 

• Automotive: Springs, fasteners, and various components.
• Tools: Saws, blades, cutting tools, and hardware parts.
• Machinery: Industrial components requiring high durability.
• Agriculture: Implements, cutting knives, and gardening tools

• Composition: Primarily iron with a low carbon content, generally below 0.25%.
• Ductility: Can be drawn out into wires or shaped without breaking.
• Malleability: Can be hammered or pressed into shape without breaking.
• Strength: Offers good strength for general engineering uses.
• Affordability: A low-cost material suitable for widespread use.
• Magnetic Properties: Ferromagnetic due to high iron content. 

• Construction: Used in various structural components and fittings.
• Automotive: For manufacturing parts and components.
• Manufacturing: Ideal for brackets, braces, strapping, and other general engineering tasks.
• Engineering: Versatile for creating custom parts and profiles. 

• Material: Low-carbon steel, offering good strength and toughness.
• Form: Thin, flat plates or sheets that can be easily cut, stamped, or milled into various shapes and sizes.
• Properties:
  • Cost-Effective: An economical choice for many general engineering needs.
  • Durable: Provides long-lasting support and structural integrity.
  • Weldable: Offers superior weldability compared to stainless steel.
  • Formable: Easy to fabricate into custom shapes, spacers, washers, and gaskets.
• Limitations: Not inherently corrosion-resistant; best for dry environments or where corrosion isn't a major concern. 

• Machinery: Aligning machine bases, leveling equipment, and adjusting clearances between moving parts.
• Construction: Shimming wobbly tables, doors, or decks, though composite or plastic shims are often preferred for outdoor, weather-exposed uses.
• Prototyping: Used to fit components together properly or to make quick adjustments. 

• Precision: Allows for fine-tuning of gaps and component fit.
• Versatility: Can be customized for a wide range of applications and shapes.
• Strength: Provides a strong, hard barrier against wear and stress. 

• High Strength & Toughness: Offers excellent yield and tensile strength, along with good impact properties, especially after hardening and tempering.
• Wear Resistance: Suitable for applications involving significant friction and wear.
• Heat Treatable: Can be hardened and tempered to achieve desired mechanical properties, including high core strength and medium skin hardness.
• Surface Hardening: The steel is suitable for surface hardening processes to create a hard, wear-resistant surface.
• Good Weldability: As an alloy structural steel, it typically offers preferable mechanical properties and heat treatment performance compared to plain carbon steels. 

• Carbon (C): 0.33 - 0.41%
• Silicon (Si): 1.10 - 1.40%
• Manganese (Mn): 1.10 - 1.40%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.035% 

• Gearing and Axles: Used for parts requiring high strength and wear resistance.
• Crankshafts: Suitable for aircraft and diesel engine crankshafts.
• Conveying Equipment: Components like bandages and conveyor parts benefit from its toughness and wear properties.
• Springs: The strong toughness of manganese-silicon steels makes them suitable for springs. 

• Often produced to standards like DIN EN 10083-2 and formerly DIN 17200

• Material: High-carbon alloy spring steel (similar to 55CrMnA, 55Cr3, ASTM 5155).
• Properties: Good elasticity, high strength, ductility, toughness, and good resistance to permanent deformation.
• Hardenability: High, allowing for effective hardening through oil quenching and tempering.
• Supplied Condition: Typically supplied in an annealed state with low hardness (under 250HB).
• Heat Treatment: Requires heat treatment (oil quenching and tempering) to achieve its final spring properties. 

• Automotive: Heavy-duty leaf springs, helical springs, and sway bars for vehicles and tractors.
• Industrial: Large plate springs and other vital springs for industrial production and heavy loads. 

• Superior Strength: Maintains high strength and elasticity under heavy stress.
• Good Performance: Excellent balance of hot working, mechanical properties, and decarburization resistance.
• Durability: High resistance to fatigue and permanent deformation. 

• 55CrMnA
• 55Cr3
• SAE 5155 / ASTM 5155 

• Material: Alloy spring steel (JIS G4801).
• Form: Round bar.
• Condition: Pre-hardened, allowing for immediate use in various applications.
• Properties: High strength, excellent elasticity, and ability to withstand elastic deformation without permanent change.
• Surface Quality: High purity, homogeneous structure, and excellent surface finish, with minimal defects and decarburization.
• Dimensional Accuracy: Tight tolerances for precise applications. 

• Springs: Used for automotive springs (like leaf springs), agricultural machinery springs, and other elastic components.
• Fabrication: Suitable for blanking, bending, drawing, extrusion, and swaging.
• Machining: A top-grade round bar for precision machining. 

• Produced with fine metallurgical quality to ensure high purity and homogeneity.
• Manufactured to precise external forms and dimensions.
• Can undergo additional metallurgical processes like annealing, normalizing, tempering, and quenching to meet specific requirements. 

• Often compared to or grouped with other spring steel grades like SUP9A, SUP10, and SUP12, as well as the international standard 51CrV4. 

Cold Rolled Steel Strips, also known as Cold Rolled & Spheriodized Annealed Steel Strips are manufactured through Cold Rolling, which is a process through which the Hot Rolled steel strip after Pickling process is introduced between rollers by application of high pressure at temperature below the re-crystallization temperature. This method basically imparts :

1) Smooth surface finish,

2) Accurate thickness, 

3) Excellent straightness, 

4) High tensile strength, yield strength and hardness with corresponding decrease in ductility. 

The process of Cold Rolling might also involve annealing the steel coils as the cold rolled strips after exiting the mill are extremely hard and stiff, exhibiting greater amounts of spring back when bent and have very limited applications. The Annealed steel strips are ductile, soft, relieved from internal stresses and have a refined homogeneous structure. The steel strips are softened for further works such as shaping, stamping, or forming. 

• Process: Heated steel (above 1,700°F) is rolled, making it soft and easy to shape.
• Surface Finish: Rough surface with a bluish-gray appearance due to mill scale (iron oxide) that forms during the high-temperature process.
• Dimensional Accuracy: Less precise than cold rolled steel, with some non-uniform shrinkage upon cooling.
• Mechanical Properties: High tensile strength, good ductility, and excellent weldability.
• Formability: Excellent plasticity and low deformation resistance, making it easy to cut, bend, and form. 

1. Heating: Steel slabs are reheated to above their recrystallization temperature.
2. Descaling: High-pressure water removes surface iron oxide (mill scale).
3. Roughing: The slab is fed through a series of roughing mills to reduce its thickness.
4. Finishing: A series of tandem mill stands roll the material to its final thickness, forming a hot rolled coil. 

• Automotive: Structural components and parts.
• Construction: Beams, channels, and other structural elements.
• Machinery: Springs, blades, and precision components.
• Piping: For electric resistance welded pipes and tubes.
• Electrical: Cores for transformers, motors, and generators. 

• Cost-Effective: Easier to produce than cold rolled steel.
• Versatile: Suitable for a wide range of applications due to its formability.
• High Strength: Meets requirements for structural uses. 

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• Material Type: Spring Steel (Silicon-Manganese alloy steel).
• Form: Flat bar with a rectangular cross-section.
• Processing: Typically hot-rolled, often with subsequent oil heat treatment for enhanced properties.
• Mechanical Properties:
  • High Strength & Toughness: Essential for absorbing shock and maintaining shape under stress.
  • Good Hardenability: Can be effectively hardened through heat treatment.
  • Strong Elasticity: Allows the material to return to its original shape after being deformed.
  • Good Plasticity: Retains sufficient workability without fracturing.
  • Resistance to Decarburization: An important feature for maintaining surface integrity and strength.
• Applications:
  • Automotive Industry: Primarily for leaf springs in cars, trucks, and other transport vehicles.
  • Railways: Used for tram and narrow-gauge railway springs.
  • Other Springing Parts: Suitable for disc springs, torsional shafts, and other components requiring elasticity and durability. 

• Material Type: Alloy Spring Steel
• Key Alloying Elements: Carbon (0.52-0.60%), Chromium (0.65-0.95%), Manganese, and Silicon.
• Mechanical Properties: High yield strength, ductility, toughness, and superior elastic performance.
• Hardenability: Excellent hardenability, meaning it can be effectively hardened through heat treatment.
• Heat Treatment: Typically oil-quenched and tempered for optimal performance and increased fatigue life. 

• Automotive: Laminated leaf springs for vehicles.
• Agricultural Machinery: Springs and chains for various types of farm equipment.
• General Engineering: Other elastic components requiring high strength and durability. 

• Resists Permanent Deformation: Maintains its shape and springiness after repeated loading.
• Improved Fatigue Life: Enhanced endurance due to heat treatment.
• High Strength: Capable of withstanding significant stress.
• Good Machinability: Can be machined into specific spring shapes.