AL-6XN®, also known as UNS N08367, is a high-performance super austenitic stainless steel designed for excellent resistance to chloride pitting, crevice corrosion, and stress corrosion cracking. With its high nickel (24%), molybdenum (6.3%), and nitrogen content, AL-6XN® performs exceptionally well in harsh environments such as seawater, brine, and strong chemical solutions.
Commonly used in food processing, marine applications, pharmaceutical manufacturing, pulp and paper bleaching, and heat exchangers, AL-6XN® offers superior corrosion resistance and good formability. It is an ideal choice when 316L or 904L stainless steel is not sufficient for aggressive corrosion conditions.
| Element | Typical (Weight %) | Specification Range (Weight %) |
| Carbon (C) | 0.02 | 0.03 max. |
| Manganese (Mn) | 0.4 | 2.00 max. |
| Phosphorus (P) | 0.02 | 0.040 max. |
| Sulfur (S) | 0.001 | 0.030 max. |
| Silicon (Si) | 0.4 | 1.00 max. |
| Chromium (Cr) | 20.5 | 20.00-22.00 |
| Nickel (Ni) | 24 | 23.50-25.50 |
| Molybdenum (Mo) | 6.2 | 6.00-7.00 |
| Nitrogen (N) | 0.22 | 0.18-0.25 |
| Copper (Cu) | 0.2 | 0.75 max. |
| Iron (Fe) | Balance | Balance |
| Property | Typical Value |
| Yield Strength (0.2% Offset) | 57 ksi (393 MPa) |
| Ultimate Tensile Strength | 112 ksi (770 MPa) |
| Elongation in 2″ (51 mm) | 44% |
| Hardness | 89 HRB |
| Property | Value |
| Density | 8.06 g/cm³ (0.291 lb/in³) |
| Melting Range | 2410-2550°F (1320-1400°C) |
| Modulus of Elasticity | 28.3 × 10⁶ psi (195 GPa) |
| Shear Modulus | 10.8 × 10⁶ psi (74 GPa) |
| Poisson’s Ratio | 0.31 |
| Thermal Conductivity (68-212°F) | 7.5 Btu/hr•ft•°F (14.1 W/m•K) |
| Coefficient of Thermal Expansion (68-212°F) | 7.9 × 10⁻⁶/°F (14.2 × 10⁻⁶/°C) |
| Specific Heat Capacity | 0.11 Btu/lb•°F (500 J/kg•K) |
| Electrical Resistivity | 535 Ohm•circ mil/ft (89.0 μΩ•cm) |
| Magnetic Permeability (Annealed) | 1.0028 |
| Scaling Temperature | 1885°F (1030°C) |
| Pipe | Pipe | Tube | Tube | Sheet/Plate | Bar | Forging | Fitting |
| Smls | Welded | Smls | Welded | ||||
| A312 | A312 | A213, A269 | A269, B676 | A240 A480 | A479 A484 | A182 | B366 |
Standard product forms of AL-6XN/N08367 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at [email protected] for full information.
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