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GRADE

Grade 409L (UNS S40900, EN 1.4512) is a kind of stabile version of 409, composed with proper chromium, low composition of carbon and nitrogen and adjunction of titanium, all composition appropriate make Grade 409L have some properties, like corrosion resistance, weldability and formability. Due to the lower chromium, Grade 409L was another low cost option for corrosion resistant stainless steel.

It has a good combination of heat resistance and corrosion resistance, can be ideal for non- or lightly corrosive environments or applications. It has excellent oxidation resistance in high temperatures and good welding performance, which can be used for automotive exhaust pipes or oil equipment.


PROPERTIES

  • Corrosion resistance
  • Resistance to oxidation
  • Excellent resistance to high temperature, exhaust gas and atmospheric corrosion
  • Heat treatment
  • Suitable for welding
  • Good flexibility and excellent formability
  • Low costs

CHEMICAL COMPOSITION AND PHYSICAL PROPERTIES FOR 409L

ItemC%Si%Mn%P%S%Ni%Cr%N%Ti%Nb%
Min --- --- ---   --- 10.5   6(C+N)  
Max 0.03 1.00 1.00 0.04 0.02 0.5 11.7 0.03 0.5 0.17
ItemTensile TestHardness TestBend Test
0.2%Y.S.1%Y.S.T.S.EL (%)HRBWHV180∘
Min 170 --- 380 20 --- --- 0.5t
Max N/mm2 --- N/mm2 --- 88 ---  

APPLICATION

  • Automotive exhaust systems (manifolds, exhaust pipes, converters, front and tail  pipes, converters, mufflers and other components)
  • Heat exchangers
  • Catalytic converter systems
  • Culverts
  • Home heating systems
  • Automotive thermostats
  • Fuel filters
  • Farm equipment components
  • Electrical transformer cases

SPECIFICATIONS

  • ASTM A240M – Chromium and Chromium – Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General Applications.
  • ASTM 480M – General Requirements for Flat Rolled Stainless and Heat-Resisting Steel Plate, Sheet and Strip
  • EN 10088-2 (1.4512) – Stainless Steel Technical delivery conditions for sheet, plate and strip of corrosion resisting steels for general purposes

PRODUCT FORMS

  • Coil
  • Sheet
  • Strip

RAW MATERIAL FINISHS & AVAILABLE SIZES

2D A uniform, dull silver gray finish, which results from cold rolling followed by annealing and descaling.
Range 914 (3') 1000 1219 (4') 1250 1500 1524 (5')
0.3mm ~ 3.0mm
30GA ~ 11GA
0.012" ~ 0.1196"
2B
(Mill Finish)
A bright, cold-rolled finish resulting in the same manner as 2D finish, except that the annealed and descaled sheet received a final light roll pass through polished rolls. This is the general-purpose cold-rolled finish that can be used, or a preliminary step to polishing.
Range 914 (3') 1000 1219 (4') 1250 1500 1524 (5')
0.3mm ~ 3.0mm
30GA ~ 11GA
0.012" ~ 0.1196"
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