stainles steel 455

Online Metals is expanding our product offering with new Stainless Steel 455 Round Bar!

Within the world of metals, stainless steels are considered high-alloy steels. This is because they contain about 4-30% chromium. All steels are classified into three broad groups. Without being too technical, these are based on the crystalline structure of their molecules. The three categories are martensitic, austenitic, and ferritic. Grade 455 is a martensitic stainless steel. It possesses a yield strength which is nearly 3 times the strength of grade 304 stainless steel. However, it also maintains a corrosion resistance uncommon in other martensitic steels.


Stainless steel 455 is commonly referred to by its trade name, Custom 455. Also, it combines corrosion resistance, easy fabrication, and exceptional yield strength. 455 is mainly used in applications that require greater corrosion resistance than offered by other 400 series alloys along with higher strength than the 300 series alloys.

stainless steel 455

455 is relatively soft and formable in an annealed condition. However, it can be machined and welded in similar ways as other age-hardened stainless steels. Additionally, the single step aging treatment yields exceptional strength coupled with good ductility and toughness.

Stainless steel 455 is optimal for applications that require simplicity of heat treatment, ease of fabrication, high strength, and corrosion resistance in combination. This gives the alloy a wide range of uses. For example, architectural, food processing and handling, heat exchangers, conveyors, aerospace, chemical, medical, and turbines are all areas that use stainless steel 455.

stainless steel 455

We hope that this information helps you figure out the best ways to use 455. Also, if you have any cool projects, feel free to share pictures with us! Lastly, we can be reached on Facebook, Twitter, Instagram, and by email.

Happy making from all of us at Online Metals!

Would you like to know more?

One of the benefits of 455 is how versatile it is and easily weldable. If you have more questions about steel or welding, we have extra blog posts about those topics. Likewise, check out the expansive glossary of welding terms.

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