Carbon steel seamless tubes Standards Astmbsdin 1.A 1792.A 1923.A 210 ( gr.A1 / gr.C )4.A 333 ( gr.1 / gr.6 )5.A 334 ( gr.1 / gr.6 )6.A 335 ( t5, t11, t12, t22 )7.A 106 ( gr.B )8.A 213 ( p5, p11, p12, p22 )9.A 209 ( gr.T1 / gr. T1a )10.A 199 ( t5 )11.A 556 ( gr. C )1.3059 part û i gr. 320 2.3059 part - ii gr. 3603.3059 gr.4404.3602 part û i cfs 3601.2391 st-35, st -45, st û 52)2.2391 /c ( st-37.4, st -52.3, st-37.03.17175 ( st-35.8, st 45.8, 15 mo 3, 10 cr mo 910, 13 cr mo 44 ) Enis 1.10305 û 1 & 102042.10216 û 2 3.10287 û 1 1.1239 ( heavy, medium )2.3074 ( cds1, cds3 ) Straight tube : hdpe packing U tube : steel crate/wooden boxes