Inconel 601 nickel-chromium-iron alloy is a multipurpose engineering material for applications that require resistance to heat and corrosion. The exceptional characteristic of Inconel 601 is its resistance to high temperature oxidation. The alloy also possesses great resistance to aqueous corrosion, has high mechanical strength, and is readily formed, machined, and welded.
The most important property of Inconel 601 is resistant to oxidation at very high temperatures up to 1250 oC even under severe conditions such as cyclical heating and cooling. This is possible due to Inconel 601 possessing a tightly adherent oxide layer which is resistant against spalling. Its resistance to carburization and carbon nitriding conditions is great. As a result of high chromium and some aluminum content, the alloy demonstrates great resistance in oxidizing sulfur bearing atmospheres at elevated temperatures.
Conventional machining techniques used for iron based alloys may be used. This alloy does work-harden during machining and has higher strength and “gumminess” not typical of steels. Heavy duty machining equipment and tooling should be used to minimize chatter or work-hardening of the alloy ahead of the cutting. This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. The alloy is not hardened or strengthened by heat treatment. Forging should be done in the temperature range of 2250 F to 1900 F. Hot work in the range of 2250 oF to 1600 oF, working in the range of 1400 oF to o1000 F should be avoided as the alloy is apt to thermal crack in that region. Cold forming can be done using standard tooling although plain carbon tool steels are not recommended for forming as they tend to produce galling