... 38CrMoAl,40CrNiMo;48CrMo,5CrNiMo;Janpan Standard:SCM415,SCM420,SCM440,SNCM439,SNCM220; SACM645USA Standard:SAE4140,SAE4130,SAE9840,SAE4340,AISI4145H ... aerospace, drilling and many other industries. There are from USA, Canada, UK, Germany, France, Italy, Spain and South ... , Coupling, RPV Stud Bolt, Pump ShaftForged shaft Material Carbon steel, alloy steel, stainless steel,Material Standard:GB, BS, ASTM, ...