... etcE: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, ASTM A312, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10219, EN10025, EN10305 ... of 3~30mmStandardGB/T8162,GB/T8163 and DIN/JIS/ASTM standarda. DIN Standard 10#(ST37-2,ST35-8),20#(ST42,ST45- ... 20#(STPG42,STB42,STS42,JIS S20C),45#(JIS S45C), 16mn(STS49,STPT49) etc.c. ASTM/AISI Standard10#(ASTM a106/53 Gr.B, ...