Standard: GB / T 1222-1984
● Features and application:
Basic properties of steel with 60CrMnA similar, but with better hardenability, quenching in oil, the critical diameter of up to 100 ~ 150mm. For production of large springs, such as bulldozers Diego on the plate spring, helical spring of large ships and large torsion spring.
● Chemical Composition:
Carbon C: 0.56 ~ 0.64
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.70 ~ 1.00
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.030
Chromium Cr: 0.70 ~ 1.00
Ni-Ni: ≤ 0.35
Copper Cu: ≤ 0.25
Boron B: 0.0005 ~ 0.004
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 1225 (125)
Conditions yield strength σ0.2 (MPa): ≥ 1078 (110)
Elongation δ5 (%): ≥ 9 (for reference)
