Stainless Steel Forged by Forging Zhejiang Yongding Steel Track Co., Ltd. Base Info Model NO.:10" 12"Standard:GB, JIS, DINShape:LongPerforated:Not PerforatedStyle:Zt4576Color:Self ColorTrademark:selfSpecification:CEOrigin:Zhejiang China Description Pre:Machining Including Rivet Welding, Casting, Forging and Heat Treatment Next:ASTM A790 UNS31803 Duplex Seamless Pipes & Tubes