forged gear ring 1) Materials: carbon steel, alloy steel, stainless steel 2) ISO9001,14001,OHS18001 Yuanfang's seamless rolled rings are produced on ring rolls radial/axial ring mills to yield a smooth product with concentric, tight tolerances. This benefits the customer through reductions in weight and machining costs. CNCprogramming ensures repeatability for multiple piece orders across the ...