Types of Stainless Steel

Forged Components wellhead casing manufacturer
2018 February27

Types of Stainless Steel

If you need stainless steel custom pressure vessel connections, make sure you choose the right material with these four types of stainless steel:


Austenitic stainless steels contain nickel, manganese, and/or nitrogen to create an austenitic crystalline structure similar to that found in heat-treated steels. Austenitic steel’s crystalline structure makes it highly weldable and formable. Though standard austenitic steels are not very corrosion resistant, forged components manufacturers can add chromium, molybdenum, nitrogen, or nickel to improve this property.


Ferritic steels are the most commonly used stainless steels. These steels contain only a small amount of carbon, less than 0.1 percent, and no or very little nickel. They are a cheaper alternative to austenitic steels. One major benefit of ferritic steel is its resistance to stress corrosion cracking. Ferritic steels with high chromium and molybdenum content are especially useful for subsea connections manufacturing due to their durability in salt water.


Martensitic stainless steels are similar to ferritic steels, but can have up to 1 percent carbon content. These steels behave similarly to most carbon steels and other low-alloy steels. Though they are not highly corrosion resistant, they are stronger, tougher, and more machinable. They can also be hardened with heat treatment.


Duplex stainless steels are a relatively new development that blend austenite and ferrite with high chromium, high molybdenum, and low nickel content. There are two types of duplex steel: lean duplex and super duplex. Lean duplex steels have similar corrosion resistance to austenitic steels with improved strength and corrosion cracking resistance. Super duplex steels have high strength and are resistant to corrosion, corrosion cracking, pitting, and crevice corrosion.

Do You Need Steel Custom Pressure Vessel Components Manufacturing?

Forged Components, Inc. provides forged steel rings and other forged vessel components. For more information, contact us online or call us at (281) 441-4088.

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