309 stainless steel is made up primarily of iron and chromium with trace amounts of other elements such as manganese, silicon, phosphorous, sulfur, and carbon. It has a relatively low carbon content compared to other 300 series grades, which makes it ideal for welding applications. Additionally, its high chromium content gives it superior corrosion resistance when compared to other stainless steels – making it perfect for use in corrosive environments like chemical plants or marine settings.
1.309 Stainless Steel is austenitic stainless steel that contains about 22% chromium, 12% nickel, and 2% molybdenum.
The higher chromium and molybdenum content in 309 provides better corrosion resistance than 304.
2.309 also has a higher temperature resistance than 304, which makes it ideal for use in high-temperature applications.
3.309 is non-magnetic and is not hardenable to heat treatment.
4.309 has a good combination of strength and ductility, making it ideal for use in a variety of applications.

Specification

Chemical composition

Mechanical Properties