Special alloys / UNS N08367
AL-6XN® is a 6% molybdenum super-austenitic alloy with high nitrogen, giving strength above 316L and excellent resistance to chloride pitting, crevice corrosion and stress-corrosion cracking.
- UNS N08367
- Spec ASTM B688
- Density 8.06 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| UNS | N08367 |
| Also known as | 6XN, Alloy 6XN |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| Ni | 23.5 | 25.5 |
| Cr | 20.0 | 22.0 |
| Mo | 6.0 | 7.0 |
| N | 0.18 | 0.25 |
| Cu | — | 0.75 |
| C | — | 0.030 |
| Mn | — | 2.00 |
| Si | — | 1.00 |
| P | — | 0.040 |
| S | — | 0.030 |
| Fe | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 655 MPa (95.0 ksi) |
| Yield strength, 0.2% offset (min) | 310 MPa (45.0 ksi) |
| Elongation in 50 mm (min) | 30 % |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.06 g/cm³ | 0.291 lb/in³ |
| Magnetic response | Non-magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Sheets & plates | ASTM B575 (Alloy 59), B625 (926), B688 / A240 (AL-6XN), ASTM F30 (Nilo) | 0.3 mm – 6 mm |
| Pipe & tube | ASTM B619 / B622 (Alloy 59), B673 / B674 / B677 (926), B675 / B676 / B690 (AL-6XN) | 1/8" – 24" NB |
| Bars & rods | ASTM B574 (Alloy 59), B649 (926), B691 (AL-6XN) | 3 mm – 500 mm |
| Flanges & forgings | ASTM B564, B462 | 1/2" – 48" NB (larger on request) |
Corrosion & temperature resistance
Alloy 59, 926 and AL-6XN offer very high pitting and crevice resistance in chloride media; Nilo alloys are chosen for dimensional stability rather than corrosion resistance.
Applications
AL-6XN®: Desalination, pharma, food processing. Glass-to-metal and ceramic-to-metal seals, lead frames and thermostat bimetals (Nilo); seawater cooling, desalination, FGD and chemical process equipment (59, 926, AL-6XN).
AL-6XN® vs Alloy 926
| AL-6XN® | Alloy 926 | |
|---|---|---|
| UNS | N08367 | N08926 |
| Key property | 6Mo + high N, seawater grade | 6Mo super-austenitic |
| Typical use | Desalination, pharma, food processing | Seawater piping, FGD, offshore |
| Cr (wt %) | 20.0–22.0 | 19.0–21.0 |
| Ni (wt %) | 23.5–25.5 | 24.0–26.0 |
| Mo (wt %) | 6.0–7.0 | 6.0–7.0 |
| C (wt %) | ≤ 0.030 | ≤ 0.020 |
| Tensile / yield (min, MPa) | 655 / 310 | 650 / 295 |
Frequently asked questions
What is the UNS number of AL-6XN®?
AL-6XN® is designated UNS N08367.
What is AL-6XN® used for?
6Mo + high N, seawater grade. Typical uses: desalination, pharma, food processing.
Is AL-6XN® magnetic?
Non-magnetic.
In which forms can I buy AL-6XN® from Rajkamal Metals?
Coils & Strips, Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Flanges, Buttweld Fittings, Socket Weld & Threaded Fittings. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with AL-6XN®?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between AL-6XN® and Alloy 926?
AL-6XN®: 6mo + high n, seawater grade. Alloy 926: 6mo super-austenitic. See the comparison table on this page.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
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