... thickness of 3~30mmStandardGB/T8162,GB/T8163 and DIN/JIS/ASTM standarda. DIN Standard 10#(ST37-2,ST35- ... 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,STPT49) etc.c. ASTM ... /AISI Standard10#(ASTM a106/53 Gr.B,A192,A179-C ...