TYPE 409 STAINLESS STEEL is especially useful for applications requiring

oxidation or corrosion protection beyond the capability of carbon steel and some coated steels.

Current uses include automotive and truck exhaust systems, tubular manifolds, agricultural spreaders,

gas turbine exhaust silencers, heat exchangers and fuel filters.

This alloy provides good oxidation and corrosion resistance for automotive and non-automotive exhaust applications.

Type 409 offers economical corrosion resistance and good formability.

The nominal 11% chromium (Cr) content offers improved corrosion
resistance over carbon steel. The composition of Type 409 is balanced with a titanium (Ti) addition

and low-carbon levels to avoid austenite formation making the alloy essentially non-hardenable

when exposed to annealing temperatures and when welding.

The titanium additions not only stabilize the steels to prevent hardening during welding,

but also prevent the formation of chromium carbides. Welds and weld heat
affected zones perform nearly as well as the base metal in corrosion resistance and forming.