321 Stainless (AMS 5645)

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.

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:

---