Incoloy
Incoloy refers to a range of superalloys produced by the Special Metals Corporation group of companies. They are mostly nickel-based, and designed for excellent corrosion resistance as well as strength at high temperatures; there are specific alloys for resistance to particular chemical attacks (e.g. alloy 020 is designed to be resistant to sulphuric acid, DS to be used in heat-treating furnaces with reactive atmospheres and many heat cycles)
Incoloy MA956 is made by a mechanical alloying rather than a bulk-melting process; it was studied for space reactor components in the JIMO project. It is difficult to weld and needs to be heated to 200C for forming processes.[1]
Compositions (percentages)
| Alloy name | Balance metal | Chromium | Aluminum | Titanium | Carbon | Yttrium oxide | Copper | Manganese | Cobalt | Nickel | Phosphorus | Silicon | Sulphur | Molybdenum | Nb+Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 020 [2] | Fe (~40%) | 20 | n/p | n/p | <0.07 | n/p | 3.5 | <2.0 | n/p | 35 | <0.045 | <1.0 | <0.035 | 2.5 | about 1 |
| DS [3] | Fe (~40%) | 18 | n/p | 0.2 | 0.1 | nil | 0.5 | 0.8-1.5 | 18 (Co+Ni 38) | 18 (Co+Ni 38) | n/p | 2.3 | 0.03 | ||
| MA956 [1] | Fe (~75%) | 20 | 4.75 | 0.4 | <0.1 | 0.5 | <0.15 | <0.3 | <0.3 | <0.5 | <0.02 | n/p | n/p |
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References
- "Incoloy alloy MA956" (PDF).
- "Incoloy alloy 020" (PDF).
- "Incoloy alloy DS" (PDF).
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