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.
| % | 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 |
Proud members of the British Valve & Actuator Association