Duplex steel UNS S31254 plate, also known as 6% Molybdenum, is a highly corrosion-resistant alloy that is ideal for use in severe environments. It is a type of austenitic-ferritic stainless steel that provides excellent resistance to chloride stress corrosion cracking and pitting corrosion. Below includes the standards, process, chemical composition, physical properties, and applications of Duplex steel UNS S31254 plate.

Duplex steel UNS S31254 plate complies with several standards such as ASTM A240, ASTM A479, ASTM A182, ASME SA240, and ASME SA479. The production process of UNS S31254 plate includes melting, hot rolling, annealing, pickling, cold rolling, and cutting. The melting process is done in an electric arc furnace or an induction furnace. The hot rolling process involves heating the steel to a high temperature and then rolling it into the desired thickness. Annealing is done to improve the ductility and toughness of the steel. Pickling is a process that removes any scale or oxide that may be on the surface of the steel. Cold rolling is done to reduce the thickness of the steel to the desired level. Finally, the plate is cut according to the required dimensions.
 

The chemical composition of Duplex steel UNS S31254 plate is as follows:

- Carbon: 0.020% maximum
- Manganese: 1.00% maximum
- Phosphorus: 0.030% maximum
- Sulfur: 0.010% maximum
- Silicon: 0.80% maximum
- Chromium: 20.00-22.00%
- Nickel: 17.50-18.50%
- Molybdenum: 6.00-6.50%
- Nitrogen: 0.18-0.22%

UNS S31254 stainless steel PHYSICAL PROPERTIES

254 SMO duplex steel plate MECHANICAL PROPERTIES

Duplex steel UNS S31254 plate has a wide range of applications in many industries such as chemical processing, oil and gas, marine engineering, paper and pulp, and food processing. It is commonly used in equipment for handling corrosive fluids, heat exchangers, pressure vessels, and piping systems that carry hot and cold fluids. It is also used in the manufacture of pumps, valves, fittings, and flanges.