● Features and application:

Is widely used manganese spring steel, strength, flexibility and higher hardenability than 55Si2Mn. For railway vehicles, automobile and tractor industry to bear a greater load on the production of flat spring 30mm or less in diameter coil spring, is also suitable for production of the following operating temperature of 250 ℃ heat-resistant non-corrosive medium under alternating load spring and and work under high stress the important roll the large spring.

● Chemical Composition:

Carbon C: 0.56 ~ 0.64

Si Si: 1.50 ~ 2.00

Manganese Mn: 0.60 ~ 0.90

Sulfur S: ≤ 0.035

Phosphorus P: ≤ 0.035

Chromium Cr: ≤ 0.35

Ni-Ni: ≤ 0.35

Copper Cu: ≤ 0.25

● Mechanical Properties:

Tensile strength σb (MPa): ≥ 1274 (130)

Yield strength σs (MPa): ≥ 1176 (120)

Elongation δ10 (%): ≥ 5

Reduction of area ψ (%): ≥ 25