steel pipe fittings Size:1/2"-48" Material:A234-WPB,A420- ... " 3.Material:Q235A,Q235B,20#U20202,20G,20R 4.Used in:Oil Field, Offshore, Gasoline, Water Systerm, Electrical factory, Building Construction ... ,STD,Sch40,XS,Sch60,Sch80, Sch100,Sch120,Sch140,Sch160,XXS seamless carbon steel elbow