Outstanding resistance to pitting and crevice corrosion
Excellent performance in seawater environments
High strength and long service life
Good weldability and fabrication
Ideal for chemical processing, marine, and offshore industries
UNS N08367 (AL-6XN / 1.4529) is a high-performance super austenitic stainless steel designed for excellent resistance to chloride-induced corrosion, With high molybdenum and nitrogen content, it offers superior performance in harsh environments where conventional stainless steels such as 316L fail
Hengyi Metal is a trusted UNS N08367 (AL-6XN / 1.4529) supplier providing high-quality alloy materials for global industries
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Email: sales@hengyimetal.com
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Note: AL-6XN is a registered trademark of Allegheny Technologies Incorporated (ATI)
Key Features
- Superior resistance to chloride-induced pitting
- Excellent crevice corrosion resistance
- High resistance to stress corrosion cracking (SCC)
- Suitable for aggressive chemical environments
- Better performance than 316L and 904L
Applications
- Seawater Systems
- Offshore Oil & Gas Platforms
- Chemical Processing Equipment
- Desalination Plants
- Pulp & Paper Industry
Learn more about UNS N08367 (AL-6XN / 1.4529)
Chemical Composition
The alloy’s high nickel, chromium, and molybdenum content, combined with a nitrogen addition, stabilizes the austenitic structure and enhances resistance to localized corrosion .
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 23.5 – 25.5 |
| Chromium (Cr) | 20.0 – 22.0 |
| Molybdenum (Mo) | 6.0 – 7.0 |
| Nitrogen (N) | 0.18 – 0.25 |
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 |
| Copper (Cu) | ≤ 0.75 |
| Iron (Fe) | Balance |
Physical Properties
Density: 8.06 g/cm³ (0.291 lb/in³)
Melting Range: 1320 – 1400 °C (2410 – 2550 °F)
Electrical Resistivity: 89.0 µΩ·cm (at room temperature)
Magnetic Permeability: Non-magnetic (Annealed: 1.0028 at H=200 Oersteds)
Modulus of Elasticity: 195 GPa (28.3 x 10³ ksi) in tension
Typical Applications
Given its balance of strength, corrosion resistance, and cost-effectiveness, UNS N08367 is widely specified for :
| Industry | Applications |
|---|---|
| Marine & Offshore | Seawater heat exchangers, condensers, piping systems for firewater, splash zone sheathing, and offshore platform risers |
| Pollution Control | Flue Gas Desulfurization (FGD) scrubbers, ductwork, dampers, and absorber towers |
| Chemical Processing | Evaporators, vessels, and piping handling chlorides, sulfuric acid, and phosphoric acid |
| Pulp & Paper | Bleaching plants, digesters, and black liquor recovery systems |
| Oil & Gas | Process piping systems, heat exchangers, and components exposed to sour gas and seawater |
