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Grade 42CrMo
A30422
Corresponding Standard JB /T 6908-2020
Steel forings for displacement compressors
Classification Alloy Steel
42CrMo Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value 0.38 0.17 0.5 - - 0.9 - - 0.15
Maximum Value 0.45 0.37 0.8 0.03 0.03 1.2 0.3 0.2 0.25
42CrMo Mechanical Properties
thickness or diameter
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
≤ 100 Tempering 900~1100 ≥650 ≥12 ≥50 269~321 KU2：≥ 50
（KV2:≥35）
KDVM：≥ 40
＞100~160 Tempering 800~950 ≥550 ≥13 ≥50 241~302 KU2：≥ 50
（KV2:≥35）
KDVM：≥ 40
＞160~250 Tempering 750~900 ≥500 ≥14 ≥50 225~269 KU2：≥ 35
（KV2:≥35）
KDVM：≥ 40
＞250~500 Tempering 690~840 ≥460 ≥15 ≥48 207~255 KDVM：≥ 38
＞500~750 Tempering 590~740 ≥390 ≥16 ≥45 176~241 KDVM：≥ 38
42CrMo Corresponding Standards(Same grade name, different standards)
1 GB /T 3077-1999
42CrMo A30422
2 GB /T 17107-1997
42CrMo
3 GB /T 3077-2015
42CrMo A30422
4 Q/BQB 517-2018
42CrMo
5 GB /T 3078-2019
42CrMo
6 JB /T 6396-2006
42CrMo
7 GB /T 18248-2021
42CrMo
8 GB /T 41157.1-2022
42CrMo 42CM
9 GB /T 41157.2-2022
42CrMo 42CM
10 JB /T 6908-2020
42CrMo A30422
11 GB /T 37601-2019
42CrMo

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!