1: Product Details
Type 409 is a heat resisting ferritic stainless steel providing good oxidation and corrosion resistance compared to carbon steel. This titanium stabilized grade was developed for automotive exhaust systems but its good formability, weldability, and corrosion resistance has led to its use in other applications. The corrosion resistance of Type 409 is better than coated carbon steel, similar to that of Type 410 stainless steel, and less than that of Type 304/304L stainless steel. Type 409 is not suggested for cosmetic or surface critical applications as light surface rusting can form during exposure to atmospheric conditions.
ASTM A240 defines three (3) sub categories of Type 409 stainless steel; UNS S40910, UNS S40920 and UNS S40930. Each of these designations has a slightly different Ti or Nb stabilization requirement. Each of these compositions can be supplied as UNS S40900 unless the purchaser specifically identifies a specific composition. It is produced with enhanced formability characteristics known as "High Performance" or "Ultra Form" in the industry.
Typical Applications: Automotive exhaust systems applications such as manifolds exhaust pipes, catalytic converters, mufflers, tail pipes and other components. Non-automotive exhaust applications such as home heating systems, automotive thermostats and fuel filters, electrical transformer cases, caskets and heat exchanger tubing.
2: Chemical Composition Of 409
Element |
UNS S40910 |
UNS S40920 |
UNS S40930 |
C |
0.03 Max |
0.03 Max |
0.03 Max |
Mg |
1.0 Max |
1.0 Max |
1.0 Max |
S |
0.02 Max |
0.02 Max |
0.02 Max |
Ph |
0.04 Max |
0.04 Max |
0.04 Max |
Si |
1.0 Max |
1.0 Max |
1.0 Max |
Cr |
10.5-11.7 |
10.5-11.7 |
10.5-11.7 |
Ni |
0.5 Max |
0.5 Max |
0.5 Max |
N |
0.03 Max |
0.03 Max |
0.03 Max |
Ti |
6*(C+N)-0.5 |
8*(C+N)Min/0.15-0.5 |
0.05 Min |
Nb |
0.17 Max |
0.1 Max |
- |
Ti+Nb |
- |
- |
[0.08+8x(C+N)] min. - 0.75 Max |
3: Stainless Steel Plate Process
4: Package & Shipping
5: Company Introduction
6: Contact Us