Mechanical properties of 65Mn spring steel

The mechanical properties of 65Mn spring steel are as follows
Tensile strength σ B (MPA): ≥ 980 (100)
Yield strength σ s (MPA): ≥ 784 (80)
Elongation δ 10 (%): ≥ 8
Reduction of area ψ (%): ≥ 30
Hardness: hot rolling, ≤ 302hb; cold drawing + heat treatment, ≤ 321hb