30CrMoA alloy steel properties

30CrMoA steel is an alloy structural steel. This steel has high strength and toughness, high hardenability, and the critical hardenable diameter in oil is 15～70mm.
 
Mechanical properties:
Tensile strength σb (MPa): ≥930(95)
Yield strength σs (MPa): ≥735(75)
Elongation δ5 (%): ≥12
Reduction of area ψ (%): ≥50
Impact energy Akv (J): ≥71
Impact toughness value αkv (J/cm2): ≥88(9)
Hardness: ≤229HB
 
30CrMoA alloy steel properties
The hot strength of 30CrMoA alloy steel is also good. It has sufficient high temperature strength below 500°C, but its strength decreases significantly at 550°C; when the alloying element is at the lower limit, the weldability is quite good, but when the alloy element is close to the upper limit, the weldability is medium, and before welding. It needs to be preheated to above 175°C; 30CrMoA alloy has good machinability and moderate plasticity during cold deformation; the first type of temper brittleness in the range of 300 to 350°C during heat treatment; there is a tendency to form white spots.