409 Stainless Steel Rolled Coil

Type 409 (UNS S40900) is a ferritic rolled coil stainless steel that has a good combination of heat resistance and corrosion resistance. This alloy also achieves good ductility and is used in some deep drawing applications.

409 stainless steel rolled coil is used in several applications, and is particularly prevalent in the automotive industry.

409 Stainless Steel Rolled Coil Specifications:

ASTM A240 for annealed condition
ASTM A666 for tempered material*

Composition per ASTM A240
Carbon .03 Max
Manganese 1.00 Max
Phosphorus .04 Max
Sulfur .02 Max
Silicon 1.00 Max
Chromium 10.50 – 11.70
Nickel .50 Max
Nitrogen .03 Max
Mechanical Properties (Annealed, Per ASTM A240)
UTS 55,000 ksi Min
Elongation % in 2″ 20.00 Min
Rockwell Hardness RB88.00 Max

* Tempered mechanical properties are available upon request.

409 Stainless Steel Rolled Coil Applications:


  • Car and truck exhaust-systems
  • Tubular manifolds
  • Mufflers
  • Silencers
  • Catalytic converters


  • Dry fertilizer spreaders
  • Farm animal pens

Magnetic Properties:

409 flat rolled stainless steel is magnetic and cannot be hardened by heat treatment. It can, however, be somewhat hardened by cold-working.


Type 409 has great ductility and is suitable for use in deep draw applications. It is also easily formable.

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