SUH409L Stainless Steel Tube ASTM AISI 409L Welded Tube For Exhaust
409 / 409L Applications
Due to good resistance to high temperature corrosion and gas
corrosion, good mechanical property and weldability, 409 / 409L is
extensively used in automotive applications, truck exhaust systems,
agricultural equipment, as well as heat and gas turbine exhaust
Grade 409 / 409L, Type 409 / 409L, Inox 409 / 409L, AISI 409 /
409L, SUH409 / 409L, 1.4512, UNS S40900, UNS S40903, Acero 409 /
Common Trade Names
409 Stainless, 409 Stainless Steel
Although susceptible to rust formation, making this grade of
stainless steel somewhat undesirable for decorative purposes, 409
is extremely resistant to various forms of gas corrosion.
- It is suggested prior to welding, the steel is pre-heated to
150-260C and also suggested post-weld annealing at 760-815C.
Typical Manufacturing Specifications:
Fe, <0.08% C, 10.5-11.75% Cr, <0.5% Ni, <1.0% Mn, <1.0%
Si, <0.045% P, <0.03% S, 6x%C-0.75% Ti
Spezilla's seamless bright annealed stainless steel tubes are
produced acc. to the following process and inspection to assure our
1. Chemical Composition Analysis Test With 100% PMI.
2. Solution Annealing / Bright Annealed.
3. 100% Hydrostatic Test and 100% Eddy Current Test
4. Mechanical Tests includes Tension Test, Flattening Test, Flaring
Test, Hardness Test.
5. Impact Test subject to Standard request.
6. Grain Size Test and Intergranular Corrosion Test.
7. Visual Test and Endoscope Test for Surface Quality Test
409 is the perfect grade stainless steel to be used in automotive
applications where visual appeal is not a top priority. For this
reason and for its durability to gas corrosion, 409 is most
commonly used in truck exhaust systems, agricultural equipment, and
heat and gas turbine exhaust silencers.
ASTM A268 409 409L 1.4512 stainless steel is an alloy designed
principally for the automotive exhaust industry, although it has
been used successfully in other industrial applications. It
combines good elevated temperature corrosion resisitance with
medium strength, good formability and overall cost. 409L stainless
steel is highly resistant to high temperatures, achievable engine
and exhaust systems, and reduces the thickness of the exhaust
system to reduce exhaust emissions. Low cost, good flexibility,
high yield, easy replacement, and environmentally friendly new
Grade 409 / 409L is a titanium stabilized Ferritic Stainless Steel ,most commonly
known for use in automotive exhaust systems. It features good
mechanical properties and high temperature corrosion resistance. As
a matter of fact, 409 / 409L as a chromium stainless steel can also
be used in applications where weldability and corrosion protection
are demanded. Although it is susceptible to rust formation, rarely
used for decoration purpose, 409 / 409L stainless steel
demonstrates excellent corrosion resistance against gas corrosion.
|Tube OD.:||1/4'' - 2''|
|Wall:||0.028'' - 0.120''|
|Standard:||ASTM A268 ASME SA268|
|Finish:||Annealed & Pickled.|
|Type:||Seamless Cold Drawn|
|Mill Test Certificate:||EN10204 3.1|
|Packing:||Sleeved, Wooden Boxed|
Chemical Composition of ASTM A268 409 S40900 Grade and EN 10088-2
1.4512 1.4516 Stainless Steel
|TP409||min. max.||- 0.08||- 1.00||- 1.00||- 0.045||- 0.030||10.5 11.7||- 0.50||6×C-0.75|
|TP409L||min. max.||- 0.035||- 1.00||- 1.00||- 0.045||- 0.030||10.5 11.7||- 0.50||6×C-0.75|
|1.4516||min. max.||- 0.08||- 1.50||- 0.70||- 0.040||- 0.015||10.5 12.5||0.50-1.50||0.05-0.35|
|1.4512||min. max.||- 0.030||- 1.00||- 1.00||- 0.040||- 0.015||10.5 12.5||- 0.50||6×(C+N)-0.65|