A855/A855M-03(2014) is a standard specification for steel plates, 9% nickel alloy, for pressure vessels, produced by the thermo-mechanical control process (TMCP). This standard provides the chemical composition requirements for the steel grade along with its mechanical properties.
The chemical composition of the A855/A855M-03(2014) steel grade includes elements such as carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, and boron. These elements contribute to the overall strength, toughness, and corrosion resistance of the steel.
The mechanical properties of the A855/A855M-03(2014) steel grade include tensile strength, yield strength, elongation, and impact energy. These properties are crucial in determining the suitability of the steel for various applications, especially in pressure vessel manufacturing.
The A855/A855M-03(2014) standard also provides information about the required heat treatment processes, such as normalization or quenching and tempering, to achieve the desired mechanical properties.
This standard is applicable for steel plates intended for low-temperature service, specifically for cryogenic applications. The high nickel content in the steel provides exceptional toughness and resistance to brittle fracture at low temperatures, making it suitable for use in pressurized storage tanks for liquefied natural gas (LNG) and other cryogenic fluids.
Overall, the A855/A855M-03(2014) steel grade is a specialized steel material with excellent low-temperature properties, making it suitable for demanding applications in the energy, chemical, and petrochemical industries.