What are the characteristics of 30CrMo seamless steel pipe?

Main characteristics of 30CrMo seamless steel pipe
30CrMo seamless steel pipe has high strength and toughness, high hardenability, and the critical hardening diameter in oil is 15-70mm; the thermal strength of steel is also good, with sufficient high temperature strength below 500 ℃, but 550 ℃ When the alloy element is welded at the lower limit, the weldability is quite good, but when approaching the upper limit, the weldability is moderate, and it needs to be preheated to above 175 ℃ before welding; the machinability of the steel is good, the plasticity during cold deformation is moderate; In the range of 300 ~ 350 ℃ there is the first type of temper brittleness; there is a tendency to form white spots.
 

30CrMo thick-wall seamless steel pipe plant heat treatment:

Quenching heating temperature (℃): 880; coolant: water, oil
Tempering heating temperature (℃): 540; coolant: water, oil
Tensile strength (σb / MPa): ≥930
Yield point (σs / MPa): ≥785
Elongation after breaking (δ5 /%): ≥12
Sectional shrinkage (ψ /%): ≥50
Impact absorption work (Aku2 / J): ≥63
Brinell hardness (HBS100 / 3000) (annealed or high temperature tempered state) ≤229

30CrMo seamless steel pipe application

30CrMo seamless steel pipe is used in the manufacturing of steam turbines and boilers to manufacture fasteners working below 450 ° C, flanges and nuts subjected to high pressure below 500 ° C, and is particularly suitable for the manufacture of conduits operating at 300 atmospheres and below 400 ° C.