... : GB/T3639,8162,3087,ASTM A106,A192,BS3059,3601,3602,6323, DIN1629,1630, JIS G3454 Grade:1010, St12,040A10, Steel TubeWe ... GB/T3639,8162,3087,ASTM A106,A192, BS3059,3601,3602,6323, DIN1629,1630, JIS G34541.Standard:GB/T3639,8162,3087,ASTM ... A106,A192,BS3059,3601,3602,6323,DIN1629,1630,JIS G34542.Grade:By ASTM:1005,1006,1008 ...