Patent ID: 8808475

Claim:
A method comprising fabricating a mold from materials comprising a creep-resistant and low-expansion iron-nickel alloy that has increased mechanical strength and producing an aircraft part of carbon fiber-reinforced composite in the mold, the alloy consisting essentially of, in % by weight, Ni 37.0 to 40.5% C max. 0.1% Ti 2.0 to 3.0% Al 0.1 to 0.8% Nb 0.1 to 0.6% Mn 0.005 to 0.1% Si 0.005 to 0.1% Co >3.5 and <5.5 remainder Fe and impurities, the alloy satisfying the condition Ni+½ Co>38 and <43%; the alloy having a mean thermal expansion coefficient of <3.5×10 −6 /K in a temperature range from 20 to 200° C., the alloy being solution annealed and cured to have a yield point of R p0.2 ≧871 MPa-≦0.950 MPa and a tensile strength R m ≧1060 MPa-≦1179 MPa.