ALLOY/ CARBON STEEL, DORP FORGED, HEAT TREATED 1) STANDERD: EUROPEAN TYPE, US TYPE, ... DIN TYPE, JIS TYPE2) GRADE: G100 G80 G70 G433) MATERIAL: ALLOY STEEL ... , CARBON STEEL, EN1677 MATERIAL, STAINLESS STEEL,23MnCrNiMo54, 20CrNiMo, 35CrMo, 40Cr, Q235, 20CrMnTi, 20Mn2, 45#4) SURFACE ...