... professnal manufacturer high quality thoughtful service payment term:L/C T/T forging(body,body adapter,stem housing,seat ring,trunnion,plate ... composition:C=0.19% Mn=1.00% P%=0.018 S=0.008% Si=0.28% Cr=0.03% Ni=0 ... =0.006% V=0.01%Mechanical properties:Y.E.=371Mpa T.S.=566Mpa E%=31.4% R.A.%=70.7%Hardness: from ...