... are us stainless steel round pipe1.Specification:GB6728,DIN,JIS,ASTM-A5002.Grade:Q195,Q235,Q345,ST37-2,ST52-3,SS400 ... , TP316L, TP316 / 316L dual grade, TP317L,TP321, TP347 5) Standards: ASTM (ASME) SA / A312 / MCommodity Description Stainless steel seamless pipe 1 ...