ASTM A234 Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service   Grade: WP11   Chemical Requirements Composition, % Grade WP11 CL1 WP11 CL2 C 0.05-0.15 0.05-0.20 Mn 0.30-0.60 0.30-0.80 P 0.030 0.040 S 0.030 0.040 Si 0.50-1.00 0.50-1.00 Cr 1.00-1.50 1.00-1.50 Mo 0.44-0.65 0.44-0.65   Tensile Requirements Grade…