more than 5 years experience, 42CrMo4, 16Mn, 34CrNiMo6 and so on Length max 16m,Diamater 300mm-3800mm, Wgt: 1t-35t. Q+T Forging: Free-forging and Ring-forging.Type: 1.5MW, 2MW, 3MW,3.6MW Detailed Product Description Features: 3MW, 2MW and 1.5MW Wind turbine principal shaft Standards: ASTM, ASME, DIN, SIS and EURONORM Certification: TUV, ISO9001: 2000 Materials: Carbon, stainless steel and alloy ...