USE: A213 : Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater and Heat-Exchanger Tubes Weight Count:(just for Alloy Steel) Weight(Kg/M)=(OD-WT)WT0.02466 OD:Outside Diameter WT:Wall-Thickness A213 Alloy Boiler Tube Chemical Requirements C max Mn max P max S max Si min Cr max Ni max Mo max Cu Max T5 0.15 0.3-0.6 0.025 0.025 0.5 4.0-6.0 0.45-0.65 T11 0.05-0.15 0.3-0.6 0.025 0.025 0.5-1.0 1.0-1.5 0.44-0.65 T12 0.05-0.15 0.3-0.61 0.025 0.025 0.50 0.8-1.25 0.44-0.65 T22 0.05-0.15 0.3-0.6 0.025 0.025 0.5-1.0 1.9-2.6
