High-performance alloy material for industrial engineering and critical application conditions.
Our company’s scope of supply includes
Non-standard forgings, round rods, steel plates/steel belts, flange pipe fittings, seamless pipes, capillaries, etc. Welcome to inquire!
1. Introduction to 254SMO materials
254SMO is an austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to pit corrosion and crevice corrosion. Such grades of stainless steel are developed for use in environments containing halides such as sea water. 254SMO also has good resistance to uniform corrosion. Especially among halide-containing acids, this steel is better than ordinary stainless steel.
2. 254SMO chemical composition
| alloy | % | Chromium Cr | Carbon C | Silicon Si | Phosphorus P | Sulfur S | Ni | Molybdenum Mo | Copper Cu | Nitrogen N | Ce |
| 254smo | Minimum value | 19.5 | – | – | – | – | 17.5 | 6.0 | 0.5 | 0.18 | 0.03 |
| Maximum value | 20.5 | 0.02 | 0.80 | 0.030 | 0.010 | 18.5 | 6.5 | 1.0 | 0.20 | 0.08 |
3. 254SMO physical properties
Density: 8.24g/cm3
Melting point: 1320-1390 ℃
Magnetic: None
4. 254SMO corrosion resistance
254SMO also has good resistance to uniform corrosion. Especially among halide-containing acids, this steel is better than ordinary stainless steel. Its C content is <0.03%, so it is called pure austenitic stainless steel (<0.01% is also called super austenitic stainless steel).
Super stainless steel is a special stainless steel. First of all, it is different from ordinary stainless steel in terms of chemical composition. It refers to a high alloy stainless steel containing high nickel, high chromium and high molybdenum. Among them, the more famous is 254SMo containing 6%Mo. This type of steel has very good local corrosion resistance. It has good pitting resistance (PI ≥40) and good stress corrosion resistance under seawater, inflation, gaps, and low-speed erosion conditions. It is a substitute for Ni-based alloys and titanium alloys. Secondly, in terms of high temperature or corrosion resistance, it has better high temperature or corrosion resistance, and is irreplaceable to 304 stainless steel. In addition, in terms of stainless steel classification, the metallographic structure of special stainless steel is a stable austenite metallographic structure.
5. 254SMO application fields
