Introduction to 0Cr17Ni5Mo3N (AM350) steel grade

AM350 steel is a ferritic stainless steel developed by the ATI Corporation. It is composed of a combination of iron, chromium, and nickel which provide excellent corrosion and oxidation resistance. Its composition also makes it an excellent choice for applications that require operating temperatures up to 800°F (427°C).

The alloy was designed to deliver an outstanding combination of mechanical properties, corrosion and oxidation resistance, and high temperature performance. This combination of properties makes it an ideal material for a variety of components in the Aerospace and Defense industries, as well as general industrial applications.

AM350 steel is composed of 17% chromium, 5% nickel, and 0.3% carbon, giving it enhanced corrosion resistance. This alloy has improved mechanical properties and formability and is often referred to as an improved grade of Type 409 stainless steel.

This alloy offers good ductility and excellent creep strength at elevated temperatures up to 1300°F (704°C). It also exhibits good formability at both high and low temperatures and is readily machinable. AM350 steel is non-hardenable and has high work hardening rates.

AM350 steel has excellent resistance to scaling in air and has superior resistance to electrical erosion. It is also resistant to general corrosion, pitting, and stress corrosion cracking in fresh and salt water. It can be used for a variety of applications such as Marine components, aircraft components, heat exchangers, oil field components, etc.

Although the steel is moderately resistant to crevice corrosion, its resistance to intergranular attack is slightly lower than other alloys. It is also susceptible to chloride-induced stress corrosion cracking and can be affected by condensates from the atmosphere, making this alloy impractical for certain stagnant water environments.

In conclusion, AM350 steel is an industrially important alloy due to its combination of mechanical strength, corrosion and oxidation resistance, work hardening capacity and formability. Its superior strength and durability make it an excellent material choice for a variety of applications across various industries.

AM350 is a martensitic stainless steel with good corrosion resistance and moderate strength. It is generally used in applications requiring high temperature resistance and superior environmental resists.

Composition:

Element: Content (%)

Carbon: 0.030

Manganese: 1.00

Silicon: 0.75

Chromium: 17.00

Nickel: 5.00

Molybdenum: 3.00

Physical Properties:

AM350 has a density of 7.815 g/cc. Its melting point is between 1454-1518°C (2650-2770°F).

Mechanical Properties:

AM350 has good welding and machinability. Its yield strength ranges from 430-550MPa (630-800ksi). Its tensile strength ranges from 690-860MPa (100-125ksi). Its elongation is between 25-30%.

AMS Specifications:

AMS 5556

Aircraft and aerospace applications:

AM350 is frequently used in aircraft and aerospace applications due to its high temperature strength and good corrosion resistance. It is also used for valve and pump components such as valve stems, pumps, and impellers.

Corrosion Resistance:

AM350 has good corrosion resistance in both oxidizing and non-oxidizing media. It is used in applications where media such as seawater and salt air are present. It is also used in chemicals, food processing, and oil refining.

Conclusion:

AM350 is a high temperature martensitic stainless steel with good corrosion resistance and moderate strength. It is used in aircraft and aerospace applications as well as in valves and pumps labile to the formation of media such as seawater and salt air.