a type of steel pipe that consists of alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium, and aluminium.
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
Grade A 387 Grade 5 A 387 Grade 12 Tensile Strength (MPa) 415-585 380-550 Yield Strength (ksi) 30 33
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