Precision forged connecting link Standards:ASTM,API,UNI,DIN,JIS,EN Materials:42CrMo4,CK45,16Mn.etc CNC Machining Precision forged ... , 34CrMo4, 4137, 42CrMo, 4140, SCM440, 20CrMnMo, 40CrNiMo, 20CrNi2Mo, 20Cr2Ni4A, 34CrNi3Mothe unit weight of forgings:range from 0.1kg/pc till 200kg/pcMould ...