34CrMo4 alloy structural steel
34CrMo4 steel is a kind of alloy structural steel. It has high rupture strength and creep strength at high temperature, good impact toughness at low temperature, good hardenability, no tendency to overheat, small quenching deformation, fair plasticity and medium machinability when cold forming. Poor weldability, preheating before welding, post welding heat treatment and stress relief are generally used after quenching and tempering treatment, and can also be used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.
34CrMo4 steel equivalent grade:
| ISO | GB | JIS | ASTM |
| 34CrMo4 | 35CrMo | SCM430 | 4130 |
34CrMo4 mechanical properties:
Tensile strength σ B (MPA): ≥ 985 (100)
Yield strength σ s (MPA): ≥ 835 (85)
Elongation δ 5 (%): ≥ 12
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 63
Impact toughness value α kV (J / cm2): ≥ 78 (8)
Hardness: ≤ 229HB
