... wind turbine principal shaft Standards: ASTM, ASME, DIN, SIS and EURONORM Certification: TUV, ISO9001: 2000 Materials: Carbon, stainless steel and alloy steel ... have rich experience in the manufacture of wind turbine shaft, hub,bottom base. We have ... steel companies, we have had cooperation with Taiwan SinoSteel, Japan's IHI, MH, Nippon Steel, and other famous enterprises . main shaft for wind turbine ...