... the wind power industry, The mechanical properties of the products which are exported to Europe is : σb=900~1050mpa, σs≥700mpa ... to 15000~20000 tons. This profiled annular forgings which we develope are applied in various fields, including: various sizes and ... etc.according to customers' different requirements.(7),main material are 5CrMnMo,40Cr,42CrMo,20Cr2Ni4,5CrNiMo,15CrNiMo,20CrNiMo,35CrMo,40CrNiMo ...