ASTM A234 Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service Grade: WPB Chemical Requirements Composition, % C: 0.30 Mn: 0.29-1.06 P: 0.050 S: 0.058 Si:≥ 0.10 Cr: 0.40 Mo: 0.15 Ni: 0.40 Cu: 0.40 V:0.08 *Fittings made from bar or plate may have 0.35 max carbon. *Fittings made…