... toleraneW.TThickness Tolerance25--325MM±12.5%4—40MM±1%Length 2--12M , according to customers' requirementsMark As customers’ ... , X52, X56, X60, X65, X70, X80, PSL 1,2.And some other international standard and grade.Material1) CARBON STEEL ... 43, etc.2) ALLOY STEEL: ASTM A335 GR. P-1/P-2/P-5/P-9/P-11/ P-12/P-22/P-91/P-92/P-122.3) ... /317/317L/ 347/347H & ASTM A358 CL.1/2/3/4/5, GR.304/304L/304H/316/316L ...