About Smiths Advanced

We are a leading stockholder and global supplier of metals and plastics into Aerospace & Space, Chemical, Defence, Medical, MRO, Naval, Nuclear, Oil & Gas and Power industries.

We make high quality materials available in a fast, cost-effective and convenient package and provide a consistent supply path for all our customers.

Finishing Options

321 Stainless Steel Bar (AMS 5645)

Austenitic Stainless Steel Bars

321 stainless steel finds use in jet aircraft afterburners.

Type 321 austenitic stainless steel bars are stabilised with titanium in the alloying process, resulting in an engineering material which offers excellent resistance to intergranular corrosion in the heat-affected zone (HAZ).

The inclusion of titanium reduces the formation of chromium carbide - the non-magnetic, high-strength product that suits commercial engineering applications where components are subject to continuous heating or cooling. Typical examples include jet engine components and afterburners. The alloy benefits from impressive mechanical properties and may be easily welded and formed. The suitable operating temperature range is 800° F to 1500° F.

Temperature Performance

While the alloy retains significant strength, toughness and corrosion resistance at elevated temperatures, as an austenitic stainless steel grade, cryogenic performance is equally impressive. Therefore, 321 stainless is similarly suitable for high-temperature applications such as engine manifolds and low-temperature applications in sub-sea environments.

321 Stainless Steel Bar Datasheet

Product Suitability

321 stainless steel should be considered for applications which require freedom from intergranular corrosion in moderately corrosive environments. General atmospheric and oxidation resistance is excellent, similar to Type 304 and even better once annealed and subjected to elevated temperature service. The product also provides improved creep and stress rupture characteristics when compared to 304 stainless steel.

Product Features:

    UNS S32100
    AISI 321
    AMS 5645
    ASTM A40

    Expansion joints
    Oil refinery equipment
    Engine manifolds

    High strength
    Excellent intergranular corrosion resistance
    Impressive mechanical properties
    Improved creep and rupture properties

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