alloy steel
*JIS: SCM440, SCM415, SCM420, SNCM439, SACM645, SNCM815
*ASTM/SAE: 4140, 4130, 4340, 8620, 4145H, 9315
*EN/DIN: 42CrMo4, 18CrNiMo7-6, 34CrNiMo6, 39CrNiMo3, 31CrMoV9, 30CrNiMo8
It has passed:ISO9000/14000,CCS,RIAN,KR,NK,BV,US,ABS,RS,UK,LR,GL