Monel 600

Alloy 600 has outstanding corrosion resistance imparted by the dual corrosion fighting power of chromium and nickel. Chromium resists corrosion from oxidizing media while nickel defends against attack from many reducing agents. Alloy 600 exhibits good corrosion resistance in reducing acids, mildly oxidizing acids, high purity water, and other media. However, Alloy 600 is not suitable for strong oxidizing acids such as hot nitric acid. It is essentially immune to chloride stress corrosion cracking.

Alloy 600 provides excellent oxidation resistance at temperatures up to 2150°F (1177°C). However, it is susceptible to sulfidation attack.

Alloy 600 can be provided in the lower strength, annealed condition, or strengthened through the pilger process. Alloy 600 maintains excellent toughness even in the higher strength conditions and maintains toughness at cryogenic temperatures.

While Alloy 400 cannot be strengthened by heat treating, annealing or stress relieving are commonly used after hot working or cold working operations. Stress-relieving is conducted at 1400°F - 1600°F (760°C - 871°C). Stress-relieving is performed after cold working to reduce residual stress and prevent distortion. Annealing is performed at 1700°F - 1900°F (927°C - 1038°C) to restore full softness.

Alloy 600 has good hot and cold workability in the annealed condition. Hot-working should be done above 1600°F (871°C) to ensure adequate ductility, while cold work should be performed below 1200°F (649°C).