About 718|Inconel 718 (52.5% nickel, 19% chromium, 18.5% iron, 5% niobium, 3% molybdenum). The most widely used nickel superalloy. Precipitation-hardenable to very high strength (180+ KSI) while maintaining corrosion resistance and performance to 1300°F. This is jet engine turbine disk material, gas turbine material, and rocket engine material. Machines better than
625 or
600 in the solution-annealed condition, but still difficult. After aging it's extremely tough on tools. Ceramic inserts are common in production. Used extensively in aerospace, power generation, and oil and gas. Compare to Inconel 625 (not hardenable, better corrosion resistance, worse machinability) and Waspaloy (higher temperature capability).