... ring,ringForging styleClosed die forgingopen die forging(free forging)Minimum Reduction Ratio4:1Main marketAfrica, North America, South America, Southeast ... CE)2 Mechanical properties(yeild strength,tensile strength,elongation,reduction of area)3 heat treatment(normalized,tempered,quenched, ... for twenty years.If you are interested in our products and wanna establish business ralations with us,we are ...