... /JIS/ASTM standarda. DIN Standard 10#(ST37-2,ST35-8),20#(ST42,ST45-4/8),45#(DIN CK45),16mn(ST52.4 ... ) etc.b. JIS Standard10#(STPG38,STS38,STB30,STB33,Stb35), 20#(STPG42,STB42,STS42,JIS S20C),45#(JIS S45C), 16mn(STS49 ... /AISI Standard10#(ASTM a106/53 Gr.B,A192,A179-C),20#(ASTM A106/53 Gr.B, A178-C,A210-A-1 ... do not hesitate to let us know, thanks ASTM A106 Grade B carbon seamless steel pipe