1,schedule 20 carbon steel pipe 2,Outer diameter:10mm~900mm 3, ... 12m Materials: 19mn5,c75,sae1050,1020 ,1025 etc.Products: schedule 20 carbon steel pipe Delivery condition:cold drawn ,hot-rolled,forged ... 320G, 400G Satin / Hairlin(Matt Finish, Brush, Dull Finish), 400G,500G, 600G or 800G Mirror finish testSquash test, Extended test, Water ... ,Happy every day for you! seamless carbon steel pipe 20#