Inconel X-750
Inconel X-750 (UNS N07750, W. Nr. 2.4669, GH4145) is a precipitation-hardenable nickel-chromium alloy used for its corrosion and oxidation resistance and high strength at temperatures to 1300°F. Although much of the effect of precipitation hardening is lost with increasing temperature over 1300°F, heat-treated material has useful strength up to 1800°F. This kind of alloy also has excellent properties down to cryogenic temperatures.

Composition is shown as follows:
Nickel (plus Cobalt): 70.00 min.
Chromium: 14.0-17.0
Iron: 5.0-9.0
Titanium: 2.25-2.75
Aluminum: 0.40-1.00
Niobium (plus Tantalum): 0.70-1.20
Manganese: 1.00 max.
Silicon: 0.50 max.
Sulfur: 0.01 max.
Copper: 0.50 max.
Carbon: 0.08 max.
Cobalt: 1.00 max