Carpenter L-605 alloy is a nonmagnetic, chromium-nickel-tungsten-cobalt alloy possessing good oxidation and corrosion resistance as well as high strength properties at elevated temperatures. Although the aging response of L-605 is considered minimal when compared to typical age hardening alloys, it may be used in the cold worked and aged condition in certain instances. L-605 is generally melted using vacuum induction melting (VIM), followed by electroslag remelting (ESR). The finished mill product is supplied in the solution annealed or cold worked condition, depending on section size and application.

L-605 has displayed excellent resistance to the hot corrosive atmospheres encountered in certain jet engine operations. Resistance to oxidation is good for intermittent service up to 1600°F (871 °C) and continuous service up to 2000°F (1093°C). L-605 is highly resistant to scaling and oxidation at elevated temperatures, with particularly good qualities under extreme oxidizing conditions. This material also possesses excellent resistance to chemical oxidizing agents, and extraordinary resistance to hydrochloric and nitric acids at certain concentrations and temperatures. Resistance to salt spray corrosion is very good.