60Si2MnA Spring Steel Wire – Heavy-Duty Spring Manufacturing

Unlike standard spring steels that prioritize strength alone, 60Si2MnA is formulated with higher silicon and manganese content to deliver both high elastic limit and strong fatigue resistance under continuous cyclic loading. What sets it apart is its ability to retain shape after repeated heavy compression while maintaining enough toughness to withstand impact loads-a combination that ordinary carbon spring steels struggle to achieve. This makes it the preferred choice in China for springs that must endure millions of cycles without permanent set or premature fracture.

Product Specifications

Item

Details

Standard

GB/T 1222

Grade

60Si2MnA

Wire Diameter

0.8 mm – 20 mm

Delivery Condition

Annealed, Cold Drawn, Spheroidized, Heat Treated

Coil Weight

100 kg – 2000 kg

Surface Finish

Bright, Phosphated, Oiled

Trade Terms

FOB, CFR, CIF etc.

Property

Value

Carbon (C)

0.56–0.64%

Silicon (Si)

1.50–2.00%

Manganese (Mn)

0.60–0.90%

Phosphorus (P)

≤0.030%

Sulfur (S)

≤0.030%

Tensile Strength (Heat Treated)

1270–1570 MPa

Hardness (After Quenching & Tempering)

Approx. 44–52 HRC

Why Many Spring Manufacturers Choose 60Si2MnA

Retain shape after thousands of load cycles

Higher silicon content raises the elastic limit, so your springs won't slowly deform after long-term repeated squeezing or bending. You won't face dimensional deviation that causes assembly issues.

Balanced hardness & toughness for moving parts

Proper quenching and tempering gives this wire hard enough surface plus decent toughness. It works great for constantly stressed springs instead of simple stationary support frames, cutting your product failure rate.

Strict surface inspection extends spring service life

Tiny scratches or pits on wire easily turn into cracks under cyclic force. We deliver bright or phosphated wire with full surface checks to limit flaws, helping your finished springs last much longer.

Uniform wire size saves production downtime

Tight diameter tolerance lets your automatic coiling machines run steadily. Less frequent calibration and adjustment during mass production means higher output and lower labor waste.

Applications

This wire holds steady elasticity through countless heavy load cycles and resists fatigue much better than ordinary spring steel. It's our go-to material for all heavy-duty elastic spare parts below: