1) Material: Carbon Steel,Alloy Steel,Stainless Steel,Duplex Steel,Nickel Alloy Steel 2) Standard: ANSI,BS.DIN,JIS,UNI,GB,JB,HG ... Producing ProcessProduction EquipmentMain AchievementIntroduction of JW STEELClassification CertificateJW STEEL will take part in the following exhibitions in the year ... our website: www.jwgroup.cc to know more information. ss316 class 300 forged flange