439 Stainless steel coil
439 stainless steel reduces the content of C on the basis of ordinary ferritic material (430) and adds stabilizing elements such as Ti to improve the intergranular corrosion resistance, formability and weldability of the steel. Compared with 304 steel, although the elongation is low (about 30%), the strength and corrosion resistance are equivalent, and the corrosion resistance is better than 200 series materials. Chromium content is 12% ~ 30%. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its chloride stress corrosion resistance is better than that of stainless steel.
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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 |