UNS S31254 is a super austenitic stainless steel designed to withstand high pressures, stress corrosion cracking, and many other potentially hazardous events and materials. This high-end stainless steel contains high levels of chromium, molybdenum, nickel and nitrogen, which contribute to its excellent corrosion resistance and many other properties. This fact sheet will give you all the details you need to know about UNS S31254 and its global equivalent grades.
Fact Sheet
UNS S31254 is commonly available worldwide in several forms and for use in many industries. Although it is a popular choice for components in the chemical, marine and oil and gas industries, it also has other applications.
Available forms of UNS S31254
Depending on the manufacturer, UNS S31254 can be available in various formats to suit different uses, including:
- Coils
- Flanges
- Flats
- Fittings
- Hexagon bars
- Plates
- Round bars
- Sheets
- Tubes (Available as seamless, seam welded, cold redrawn (and/or annealed), and straight.
As previously mentioned, UNS S31254 is commonly used in the gas and oil industries. Still, its high strength and good corrosion resistance make it a solid choice in seawater applications and many industrial environments.
Applications of UNS S31254
- Chokes
- Heat exchangers
- Pumps
- Pipework
- Valves
Properties of UNS S31254
One of the critical properties of UNS S31254 is its resistance to pitting and crevice corrosion, but additional benefits include its high ductility, impact strength and resistance to crevice corrosion. This steel can be used in sub-zero temperatures, and corrosive environments and is suitable as a replacement for the 300 series austenitic stainless steels.
Mechanical Properties
| Elongation (%) | 50 | |
| Tensile strength | 98,600 (psi) | |
| Yield Strength | 43,5000 (psi) |
Physical Properties (at Room Temperature)
| Density | 8.0 g/cm3 |
| Electrical Resistivity | 8.5 μohm/cm |
| Heat | 500 J.kg-1.°K-1 |
| Melting point | 1320-1390°C |
| Thermal Conductivity | 14 W.m -1.°K-1 |
| Thermal Expansion | 16.5 μm/μm/C |
Global Equivalent Grades
The Unified Number System (UNS) designation for this high-grade steel is 31254. Still, there are many different names for stainless steel UNS 31254. Other common names include 254SMO or 6Mo. In Germany, the Werkstoff steel specification is 1.4547, also known as Alloy 254.
| UNS Number | S31254 |
| Wekstoff / EN Number | 1.4529 |
| EN name | X1CrNiMoCuN20-18-7 |
| Other names | Alloy 254, SMO 254, 254SMO |
| ASTM Specifications | A479, A473, A240, F44 |
Masteel
Our steel products can be used in a variety of applications around the world because of their high corrosion resistance. UNS S31254 is particularly resistant because of its high molybdenum levels, which makes it ideal for saltwater applications and the oil and gas industries.
Get in touch today for more information about UNS S31254 or any of our other steel products.