0Cr15Ni6MoCuNb (Custom 450) corrosion resistance

Corrosion Resistance of Custom 450 (UNS S45000)

Custom 450 (UNS S45000) is a class of austenitic stainless steel developed by Custom 450 Specialty Metals, Inc. It is an alloy composed primarily of iron and chromium, with added nickel, molybdenum, cobalt, and vanadium, designed to provide higher corrosion resistance than conventional austenitic stainless steels. The high content of nickel, coupled with molybdenum, cobalt, and vanadium provide superior corrosion resistance to a broad range of chemical environments, such as organic and inorganic acids, salts, and chlorides.

Custom 450 has high general corrosion resistance and is particularly resistant to nitric and other oxidizing acids solutions. Its superior corrosion resistance makes it an ideal material for applications in chemical processing, pollution control, and desalination plants. Additionally, it offers good resistance in thermal processing, petrochemical processing, and other industries where severe conditions may be experienced.

Custom 450 is non-magnetic and does not magnetize. It offers superior formability and weldability compared to austenitic stainless steels, making it a good choice for applications that require welding or forming. It is also very resistant to stress corrosion cracking, which can occur in chloride environments.

Despite its superior corrosion resistance and formability, Custom 450 has poor durability and is not a good choice for applications requiring high temperatures. Custom 450s high nickel content makes it sensitive to hot corrosive environments, so it should not be exposed to temperatures exceeding 815°C. Furthermore, Custom 450 has lower yield strength than conventional austenitic stainless steels, and has poor spring properties.

In conclusion, Custom 450 is an austenitic stainless steel with superior corrosion resistance and formability. However, it is not suitable for applications requiring high temperatures, and its lower yield strength and poor spring properties make it a less desirable choice for some applications.

Custom 450 stainless steel (UNS S45000) is a heat-treatable martensitic stainless steel intended for specific high-temperature structural applications. The combination of good mechanical properties and corrosion resistance makes it an ideal choice for applications such as turbine blades, exhaust systems, and other components that require high temperature strength and corrosion resistance. The alloy offers better wear resistance than grade 304 and other conventional martensitic stainless steels.

Custom 450 is a ferromagnetic steel available in both annealed and hardened conditions. It has a composition of 0.15% carbon, 6% nickel, 0.6% molybdenum, 1% copper, and 0.35% nitrogen. The alloy exhibits good toughness and ductility at elevated temperatures up to about 650°C (1200°F).

Custom 450 stainless steel provides a high level of corrosion resistance in both mildly acidic and strong alkaline environments. Its ability to resist rust and pitting in chloride-exposed environments is equivalent to or better than grade 316. Its resistance to pitting and crevice corrosion is also similar to grade 317. Custom 450 offers better corrosion resistance when compared to other iron-base alloys. Its increased tolerance of chloride-rich environments and its ability to withstand oxidizing atmospheres are particularly beneficial.

Custom 450 stainless steel is also known for having pre-oxidization and chromium carbide precipitation, making it an excellent choice for applications in petrochemical fields, power plants, and chemical processing industries. The pre-oxidation of the steel helps to increase its corrosion resistance and prevents general signs of surface corrosion such as discoloration, pitting, and staining. Its high chromium levels also helps to resist oxidizing atmospheres.

Overall, Custom 450 stainless steel offers excellent corrosion resistance, wear resistance, and toughness at elevated temperatures. Its high chromium and nitrogen content also provide a good degree of oxidation resistance. Custom 450 is well-suited for applications requiring a combination of strength and corrosion resistance.