... ( By ourself )SpecificationOD 33mm - 406mm(1”~16”) with thickness of 3~30mmStandardGB/T8162,GB/T8163 and DIN/JIS ... 4/8),45#(DIN CK45),16mn(ST52.4) etc.b. JIS Standard10#(STPG38,STS38,STB30,STB33,Stb35), 20#( ... C),20#(ASTM A106/53 Gr.B, A178-C,A210-A-1,A315-B,AISI1020),45#(AISI1045), 16mn(ASTM ... -10%,length +/-2 cmIf you have any questions, please do not hesitate to let us know, thanks ASTM A106 Grade ...