Types Of Fittings 90° Elbow 45° Elbow Tee Cross Size of Fittings Socket weld – 3000# Socket weld – 6000# Type of Material Carbon Steel : C21 / C45 / A-105 Alloy Steel : A182 F5 / F9 / F11 / F12 / F22 Stainless Steel : F304 / F304L / F316 / F316L Standard ASME ASTM DIN JIS BS AWWA etc.