... 39NiCrMo3 4130, 4340, 42CrMo4V, and so on Commodity: forged shaft 1.Material: alloy steel ,carbon steel ,stainless steel .2. ... aerospace industry, petrochemical plant, auto-power, wind-engine, metallurgical machinery, precision tools, etc. 9.Size: accordong to customer request. ... Special Steel Co., Ltd.Note: we can supply the shaft according the customer's drawing of different size and requirment ...