Austenitic chromium-nickel stainless steel alloyed with nitrogen and rare earth metals for superior high-temperature performance.
Exceptional oxidation resistance at temperatures up to 1150°C (2100°F), especially under cyclic heating conditions.
High creep strength and structural stability for reliable service in demanding thermal environments.
Good weldability and formability with excellent resistance to combustion gases and carburizing atmospheres
254SMO (UNS S31254 / 1.4547) is a high-alloy super austenitic stainless steel with excellent resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking,With high molybdenum and nitrogen content, it is specifically designed for aggressive environments such as seawater and chemical processing systems.
Hengyi Metal is a trusted 254SMO (UNS S31254 / 1.4547) supplier providing high-quality alloy materials for global industries
Contact us now for a quotation.
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
Key Advantages
- Extremely high resistance to pitting corrosion
- Excellent crevice corrosion resistance
- Strong resistance to chloride environments
- PREN value > 42 (very high corrosion resistance)
Applications
- Seawater Systems
- Offshore Oil & Gas
- Desalination Plants
- Chemical Processing Equipment
Learn more:
Chemical Composition
| Element | Content (%) | |
|---|---|---|
| Carbon (C) | ≤ 0.020 | |
| Manganese (Mn) | ≤ 1.00 | |
| Silicon (Si) | ≤ 0.80 | |
| Phosphorus (P) | ≤ 0.030 | |
| Sulfur (S) | ≤ 0.010 | |
| Chromium (Cr) | 19.5 – 20.5 | |
| Nickel (Ni) | 17.5 – 18.5 | |
| Molybdenum (Mo) | 6.0 – 6.5 | |
| Nitrogen (N) | 0.18 – 0.22 | |
| Copper (Cu) | 0.5 – 1.0 | |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed)
| Property | Typical Value | |
|---|---|---|
| Tensile Strength | 650 – 850 MPa (94 – 123 ksi) | |
| Yield Strength (0.2% Offset) | ≥ 310 MPa (45 ksi) | |
| Yield Strength (1.0% Offset) | ≥ 340 MPa (49 ksi) | |
| Elongation | ≥ 35% | |
| Hardness | ≤ 260 HB / ≤ 28 HRC | |
| Impact Strength (-196°C) | ≥ 60 J (EN 13445-2) |
