ASTM A53, also referred to as ASME SA53, is a carbon steel alloy that is used for structural and low-pressure applications. This specification covers seamless and welded black and hot-dipped galvanized steel pipes intended for mechanical and pressure applications, as well as for ordinary uses in steam, water, gas, and air lines. The specifications for this alloy are set by ASTM International in the standard ASTM A53 / A53M.
