Forging Step shaft Material:45#, 42CrMo, 30CrMo, 50CrMo4 Production Alibilty: Max OD 1500 Max Length 20mm Our pop products are :Forging Spindle / Housing ... 4145H,4340, 316,316L, 321, 18CrNiMo7-6etc.)Production Alibilty:Shaft: Max OD 1500 Max Length 20mm Max Weigth 75T/pcsRing ... OD 3500mm Roller: Max OD 3000mm45#, 42CrMo, 30CrMo, 50CrMo4 Forging Step shaft Forging step shaft 45# 42CrMo 30CrMo 50CrMo4