Spring Steel Billet 60Si2Mn

Spring Steel Billet 60Si2Mn

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