42CrMo4 steel is the United States AISI standard 4140 steel improved varieties. DIN 1.7225 / 42CrMo4 Steel is a common Chromium-Molybdenum alloy steel with quenched and tempered heat treatment.
Features:
DIN 1.7225 / 42CrMo4 steel has higher strength, excellent harden ability and good toughness.
Chemical compositions:
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
0.38 - 0.45 |
max 0.4 |
0.6 - 0.9 |
max 0.025 |
max 0.035 |
0.9 - 1.2 |
0.15 - 0.3 |
Mechanical properties:
Tensile strength σb (MPa): ≥1080 (110)
Yield strength σs (MPa): ≥930 (95)
Elongation rate δ5 (%): ≥12
Section shrinkage ψ (%): ≥45
Impact energy Akv (J): ≥ 63
Impact toughness value αkv (J / cm & sup2;): ≥78 (8)
Hardness: ≤217HB
DIN 1.7225 / 42CrMo4 alloy structure steel is used in the manufacture of more than 35CrMo steel strength and higher quality of the section of the forgings, Such as locomotive traction with a large gear, supercharger transmission gear, 42CrMo4 can also be used for 2000m below the deep well drill pipe joints and salvage tools, etc.
42CrMo4 corresponding grades:
China GB 42CrMo, Russia ГOCT 38XM, the United States AISI 4140/4142, the United Kingdom BS 708M40 / 708A42 / 709M40, France NF 40CD4 / 42CD4, Germany DIN 41CrMo4 / 42CrMo4, Japan JIS SCM4.
