Spring Steel Billet 60Si2Mn is a premium alloy steel renowned for its exceptional elasticity, high tensile strength, and superior fatigue resistance—making it the material of choice for manufacturing high-performance springs and elastic components. Compliant with industry standards, this billet is engineered to withstand repeated stress, deformation, and harsh operating conditions, ensuring long-term reliability in critical applications.
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Product details
This Spring Steel Billet 60Si2Mn is designed to provide outstanding elasticity, high tensile strength, and superior fatigue resistance, making it ideal for critical spring applications that require long-term reliability under repeated stress. The composition and heat treatment parameters can be adjusted to meet specific mechanical property requirements, ensuring optimal performance in various operating environments.
| Parameter | Value | Remarks |
|---|---|---|
| Standard | GB/T 1222-2016 | Chinese standard for spring steels |
| Grade | 60Si2Mn | Alloy spring steel with high elasticity |
| Chemical Composition (wt%) | ||
| – Carbon (C) | 0.56 – 0.64 | Enhances hardness and strength |
| – Silicon (Si) | 1.50 – 2.00 | Improves elastic limit and tempering stability |
| – Manganese (Mn) | 0.60 – 0.90 | Promotes hardenability and strength |
| – Chromium (Cr) | ≤0.35 | Controlled impurity |
| – Nickel (Ni) | ≤0.40 | Controlled impurity |
| – Copper (Cu) | ≤0.25 | Controlled impurity |
| – Phosphorus (P) | ≤0.030 | Minimized to reduce brittleness |
| – Sulfur (S) | ≤0.025 | Minimized to prevent hot cracking |
| Mechanical Properties (after quenching and tempering) | ||
| – Tensile Strength (Rm) | 1270 – 1700 MPa | High strength for load-bearing springs |
| – Yield Strength (ReL) | ≥1170 MPa | Ensures excellent elastic recovery |
| – Elongation (A) | ≥5% | Adequate ductility for forming |
| – Reduction of Area (Z) | ≥25% | Indicates good toughness |
| – Hardness | 45 – 50 HRC | Optimal for spring applications |
| – Fatigue Limit | ≥550 MPa | Resists failure under repeated loading (10⁷ cycles) |
| Heat Treatment | ||
| – Quenching | 850 – 870°C, oil-cooled | Achieves martensitic structure |
| – Tempering | 350 – 500°C | Balances hardness and toughness |
| Delivery Condition | Hot rolled, annealed, or quenched & tempered | Customizable per order |
| Typical Applications | Automobile suspension springs, railway buffer springs, industrial valve springs, clutch springs, shock absorber springs | Ideal for high-stress, cyclic-loading compon |
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