55Si2MnB chemical composition and mechanical properties

Chemical composition

Carbon C: 0.52 ~ 0.60
Silicon Si: 1.50 ~ 2.00
Manganese Mn: 0.60 ~ 0.90
Sulfur S: ≤ 0.035
Phosphorus P: ≤ 0.035
Chromium Cr: ≤ 0.35
Nickel Ni: ≤ 0.35
Copper Cu: ≤ 0.25
 

Mechanical Properties

Tensile strength σb (MPa): ≥ 1274 (130)
Yield strength σs (MPa): ≥ 1176 (120)
Elongation δ10 (%): ≥ 6
Reduction of area ψ (%): ≥ 30
Hardness: hot, ≤ 302HB; Cold Drawn + heat treatment, ≤ 321HB