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.
See the PDF links for permitted ranges of composition
|Alloy name||Balance metal||Chromium||Aluminum||Titanium||Carbon||Yttrium oxide||Copper||Manganese||Cobalt||Nickel||Phosphorus||Silicon||Sulphur||Molybdenum||Nb+Ti|
|020 ||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 ||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 ||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|