A super-austenitic nickel-chromium-molybdenum-nitrogen stainless steel, AL-6XN® has outstanding corrosion resistance in a wide range of applications.
With many years of proven seawater service and 50% higher strength than stainless steel, AL-6XN® is the alloy of choice in high chloride, seawater and brine applications.
We stock Alloy AL-6XN® in a variety of product forms to suit different applications and fabrication methods, including coil, flanges, seamless pipe, welded pipe, pipe fittings, plate, round bar and sheet. To view available sizes and submit an inquiry, use the dropdown selector below.
| % | Cr | Ni | Mo | C | N | Mn | Si | P | S | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 20.00 | 23.50 | 6 | - | 0.18 | - | - | - | - | - | - |
| MAX | 22.00 | 25.50 | 7 | 0.03 | 0.25 | 2 | 1 | 0.04 | 0.03 | 0.75 | Balance |
AL-6XN® (UNS N08367) is a 6% molybdenum, low carbon, nitrogen-bearing super-austenitic stainless alloy. The alloy was originally designed for seawater applications. AL-6XN® has also been successfully used in a broad range of very corrosive environments including the rapidly developing biopharm markets.
The high strength and corrosion resistance of the AL-6XN® alloy make it a better choice than the conventional duplex stainless steels and a cost effective alternative to more expensive nickel-base alloys where excellent formability, weldability, strength and corrosion resistance are essential.
AL-6XN® is the registered trademark of Allegheny Ludlum Corporation.
| Mechanical & Physical Properties | -268°C | -196°C | 21°C | 93°C | 149°C | 204°C | 316°C | 371°C | 427°C | 538°C |
|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength /MPa | 1503.1 | 1351.4 | 744.6 | 688.8 | - | 622.6 | 593 | - | 599.8 | 537.8 |
| 979.1 | 737.7 | 365.4 | 340.6 | - | 278.5 | 250.3 | - | 253.7 | 234.4 | |
| 36 | 49 | 47 | 47 | - | 46 | 47 | - | 48 | 50 | |
| 436.6 | 115.2 | 190 | - | - | - | - | - | - | - | |
| - | - | - | 14.22 | 14.94 | 15.12 | 15.48 | 15.66 | 15.84 | - | |
| - | - | 9.97 | 11.2 | 12.1 | 13 | 15 | 15.8 | 15.84 | - | |
| - | - | 1.95 | 1.89 | - | 1.8 | 1.71 | - | 1.61 | - |
| Alloy | %Mo | CCCT, °F | CPT, °F | PREN |
|---|---|---|---|---|
| 316L | 2.1 | < 28 | 68 | 24 |
| 2205 | 3.1 | 68 | 120 | 35 |
| 904L | 4.4 | 75 | 130 | 36 |
| ZERON® 100 | 3.5 | 108 | 180 | 41 |
| AL-6XN® | 6.3 | 110 | 172 | 44 |
| 625 | 9.0 | 113 | - | 51 |
| Alloy | 93°C | 204°C | 316°C | 427°C |
|---|---|---|---|---|
| AL-6XN® | 27.1 | 24.6 | 23.3 | 22.6 |
| 316L | 20 | 19.3 | 17 | 15.9 |
| 400 | 18.7 | 18.7 | 18.7 | 15 |
| 95 | Ultimate Tensile Strength, ksi |
|---|---|
| 45 | 0.2% Yield Strength, ksi |
| 30 | Elongation |
| 30.5 | Hardness MAX, HRC |
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