... -XXS)Lengthas buyer's requestStandard GB/T3639, GB8162,GB8163, DIN2391 ASTM A519,A106 ,A179 A53,, EN10305-1,EN10305-4,DIN17175Grade 10#,20 ... 20days after receipt T/T payment or L/CUses used for physical construction, hydraulic installation, auto parts,sleeves,and etc Contact ... personMs Daisy PLS contact me at any time astm a572 gr.50 welded steel tubeWe are direct producer and ...