409 Stainless Steel Plate
409 Stainless Steel Plate is a titanium-stabilized ferritic stainless steel(UNS S40900, 1.4512)designed for high-temperature oxidation resistance and cost efficiency. With 10.5–11.75% chromium and titanium addition, it offers good corrosion resistance in mild environments and excellent performance at –20°C to 650°C. Widely used in automotive exhaust systems(mufflers, pipes, catalytic converter shells)and construction machinery components. Cost-effective(about 40% cheaper than 304), easy to weld and form, ideal for mass production. Top demand in Turkey’s automotive aftermarket and Middle East industrial projects. Available in hot rolled and cold rolled, customized sizes supported. Inquire us now
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Product Description
Product   Name 409 Stainless Steel Plate
Standard ASTM,JIS,DIN,GB,AISI,DIN,EN
Grade/Alloy409
TechniqueCold drawn, Hot rolled, Cold rolled and Others.
Standard Size1000×2000, 1219×2438, 1500×3000, 2000×6000mm, Custom width & length available for bulk orders
Standard Thickness

Cold rolled:0.3mm – 3.0mm(most popular: 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm) 

Hot rolled:2.0mm – 12.0mm(most popular: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm)

Surface   Treatment2B(cold rolled), NO.1(hot rolled), pickled & annealed

Strength of Haiwo 409 Stainless Steel Plate: 


  • High-temperature oxidation resistance:stable up to 650°C, perfect for exhaust systems
  • Excellent weldability & formability:low thermal expansion, minimal deformation

  • Cost-effective:~40% lower cost than 304, ideal for mass production

  • Titanium-stabilized:prevents intergranular corrosion during welding

  • Good mechanical properties:tensile strength ≥380MPa, elongation ≥20%

  • Mild corrosion resistance:suitable for atmospheric & weakly corrosive environments


Widely Used In:


  • Automotive exhaust systems:mufflers, exhaust pipes, catalytic converter shells, heat shields
  • Construction machinery:engine covers, high-temperature housings, ducting components

  • Industrial furnaces & heat exchangers:oven liners, flue pipes, boiler parts

  • Home appliances:water heater tanks, microwave shells, kitchen equipment

  • Turkey auto parts aftermarket:top demand for replacement exhaust components

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