A nickel-chromium-tungsten-molybdenum grade, Alloy 230 has outstanding oxidation resistance up to 1149 °C.
Alloy 230 has excellent long-term resistance to oxidation and thermal stability. In addition, the alloy also has good resistance to nitriding and carburising environments.
| % | Ni | Cr | W | Mo | Co | Al | La | Mn | C | Si | Ph | S | B | Ti | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 47 | 20 | 13 | 1 | - | 0.20 | 0.005 | 0.30 | 0.05 | 0.25 | - | - | - | - | - | - |
| Max | 65 | 24 | 15 | 3 | 5 | 0.50 | 0.005 | 1 | 0.15 | 0.75 | 0.03 | 0.015 | 0.015 | 0.10 | 0.50 | 3 |
Alloy 230 has outstanding oxidation resistance and superior strength up to 1149 °C. Comparable to Alloy 600, Alloy 230 exhibits excellent nitriding and carburising resistance. The alloy is one of the most nitriding-resistant materials available.
Alloy 230 has excellent creep and fatigue resistance combined with long-term stability. In addition the alloy is resistance to grain coarsening when subject to elevated temperatures for prolonged periods.
Alloy 230 is easily fabricated and welded. As a result of its good ductility, Alloy 230 is readily formed by cold working.
| Mechanical & Physical Properties | 21.1°C | 538°C | 649°C | 704°C | 760°C | 816°C | 871°C | 927°C | 982°C | 1093°C |
|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength/MPa | 841.2 | 703.3 | 6668.8 | - | 537.8 | - | 310.3 | - | 172.4 | 89.6 |
| 0.2% Yield Strength/MPa | 420.6 | 303.4 | 303.4 | - | 324.1 | - | 234.4 | - | 124.1 | 68.9 |
| Reduction of area | - | - | - | - | - | - | - | - | - | - |
| Elongation/% | 47 | 54 | 57 | - | 61 | - | 75 | - | 50 | 37 |
| Charpy Impact V-notch | - | - | - | - | - | - | - | - | - | - |
| Minimum Creep 0.0001% per hr | - | - | - | - | - | - | - | - | - | - |
| 10,000 hr Rupture Strength(MPa) | - | - | 186.2 | 127.6 | 91 | 57.9 | 38.6 | 22.1 | 7.6 | - |
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