What is the difference between alloy 400 and K500?
While the corrosion resistance of both alloys is similar, Alloy K500 was developed for its higher strength and hardness. However, this introduces a greater tendency for stress corrosion cracking in certain environments.
The addition of titanium and aluminum to Alloy 400 allows for age hardening.
Key Features of Alloy 400:
Excellent resistance to neutral and alkaline salts.
Alkali resistance.
Stress corrosion cracking resistance.
Good mechanical properties from sub-zero temperatures to 548.88°C
Alloy 400 is also known as UNS N04400, MONEL 400, and Nickel Alloy 400
Common Applications for Alloy 400:
Pumps and Valves
Chemical Processing
Offshore Engineering
Heat Exchangers
Technical Resources: Burst Pressure Gauges – Alloy 400 Seamless Tube
Key Features of Alloy K500:
Excellent mechanical properties from sub-zero temperatures to approximately 480°C
Excellent corrosion resistance in a wide range of environments
Resistance to hydrogen sulfide allows Alloy K500 to be used in sour gas environments
Common Applications for Alloy K500:
Pumps and Valves
Impellers
Scrapers
Drill Collars
Alloy K50 is also known as Monel K, UNS N05500, W.Nr. 2.4375, and Nickel Alloy K500.
For more information on Alloy 400 and K500, check out our Alloy Properties Guide.
