The advantages and industrial applications of JIS SCM440, SAE 4140 and 42CrMo alloy steel pipes
DIN 34CrMo4, W-Nr.1.7220, ASTM 4130, AISI 4130, SAE 4130, NF 30CD4, GOST 30XM,20CrMo, JIS G4104 SCM420, NF 18CD4, NF 20CD4, DIN 25CrMo4, GOST 20XM; DIN 17210 20Cr4, DIN 17210 41Cr4, GOST 4543 20X, GOST4543 40X, JIS steel SCr420 pipe SCr440