409 Stainless steel coil
Grade 409 is a titanium-stabilised ferritic stainless steel. Although regarded as a general-purpose chromium stainless steel the almost exclusive application for Grade 409 is automotive exhaust systems. Its applications are those where appearance is a secondary consideration to mechanical properties and corrosion resistance, particularly at high temperatures, and where some weldability is required.
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| Finish | Description | Thickness (mm) | Width (mm) |
| 2B | Smooth finish, reflective grey sheen.Most widely used surface finish. | 0.55 | 914 & 1219 |
| Bright Annealed (BA) | Cold rolled, annealed in a controlled atmosphere to retain a highly reflective finish. | 0.70 | 914 & 1219 |
| Dull Polish (DP) | Selected for ease of cleaning, brushed look, non-reflective, used extensively in the catering industry, also push plates and kickplates. | 0.90 | 750, 914 & 1219 |
| Hot Rolled (HR) | Scaled finish, ideal if surface finish is not a key concern. | 1.20 | 750, 914, 1050, 1219 & 1500 |
| No.1 | Finished by hot-rolling,annealing and pickling, characterized by white pickled surface | 1.50 | 914, 1219 & 1500 |
| HL | finished by continuous liner polishing | 1.60 | 914, 1219 & 1500 |
| No.4 | polishing with No.150 to No.180 mesh | 2.00 | 914, 1219 & 1500 |
| No.8 | a mirror-like reflective surface by polishing | 2.50 | 914, 1219 & 1500 |
| Grade | W.nr | DIN | C | Cr | Ni | Mo | N | Mn | Other |
| 201/201L | – | – | 0.15 | 16.0-18.0 | 3.50/5.50 | – | 0.25 | 5.5-7.5 | 0.25N |
| 301 | 1.4310 | X12CrNi177 | 0.15 | 16.0-18.0 | 6.00/8.00 | – | 0.1 | 2 | – |
| 303 | 1.4305 | X12CrNi188 | 0.15 | 17.0-19.0 | 8.00/10.00 | 0.60* | 0.1 | 2 | – |
| 304 | 1.4350 | X5CrNi189 | 0.08 | 18.0-20.0 | 8.00/10.50 | – | 0.1 | 2 | – |
| 304L | 1.4306 | X2CrNi1911 | 0.03 | 18.0 – 20.0 | 8.0-12.0 | – | 0.1 | 2 | – |
| 321 | 1.4541 | X10CrNiTi189 | 0.08 | 17.0-19.0 | 9.0-12.0 | – | 0.1 | 2 | Ti 5x(C+N) |
| 316 | 1.4435 | X2CrNiMo1812 | 0.08 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.1 | 2 | – |
| 316L | 1.4436 | X2CrNiMo1812 | 0.03 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | 0.1 | 2 | – |
| 309 | 1.4828 | X15CrNiSi2012 | 0.08 | 22.0-24.0 | 12.0-15.0 | – | – | 2 | – |