Automotive Stainless Steel Tubing

Quality and Properties

Containing approximately 11% chromium, 409 forms a stable oxide layer that protects against corrosion and scaling at elevated temperatures. It combines good mechanical strength, formability, and weldability, allowing ease of fabrication and dependable performance in service.

Applications

• These properties make 409 stainless particularly suited to exhaust components such as manifolds, catalytic converter shells, mufflers, and tailpipes, where resistance to cyclic heating and cooling is essential.
• The material retains its strength and appearance under prolonged thermal exposure, extending component life.
• Beyond automotive applications, 409 stainless is also used in heat exchangers, agricultural equipment, and other machinery where moderate corrosion resistance and
  elevated temperature capability are required – offering a practical and economical alternative to higher-alloy stainless steels.

Type 409 offers improved heat and corrosion performance over aluminised steel but it is less resistant to surface oxidation than austenetic grades such as 304. Light rust or discolouration is typical in service.

Base Material Properties

Type 409L ferritic stainless steel manufactured to ASTM A24M-22 and JIS SUS 409L

Notes: A limited size and length range is currently offered in 2.0mm; additional sizes and lengths may be produced on request, subject to minimum order quantities (MOQs). Kg/m denotes what is possible to manufacture, not stocked items.

Type 409 offers improved heat and corrosion performance over aluminised steel but it is less resistant to surface oxidation than austenetic grades such as 304. Light rust or discolouration is typical in service.