SUS443 Stainless Steel Tubing with Mirror Finish and Corrosion Resistant Properties in OD 6-630mm
443 stainless steel is a ferritic alloy composed primarily of chromium and titanium, with extremely low carbon content. This unique composition provides exceptional corrosion resistance, particularly against moisture and salt exposure. While most ferritic alloys typically offer less durability than austenitic varieties, the high chromium content in 443 makes it at least as corrosion-resistant as 304 stainless steel.
Compared to 304 stainless, 443 exhibits lower thermal expansion, resulting in reduced stress and warping during heating processes. The material's magnetic properties, derived from its high chromium content, do not indicate inferior quality—chromium remains one of the most corrosion-resistant metals available.
As a modern ferritic stainless steel, 443 offers excellent rust resistance and good formability through optimized carbon reduction and increased chromium with titanium additions. These properties approximate those of 304 grade stainless steel, making 443 a cost-effective alternative across numerous applications.
| Item | Standard | Finish | Thickness (mm) | Width (mm), Master Coil Sizes | Remark |
|---|---|---|---|---|---|
| 443 Stainless Steel Coil | ASTM JIS GB | No.1 (1D) | 3.0~8.0 | 1000 | 1219 | 1250 | 1500 | 1800 | 2000 | Cut length up to 12 meters |
| 2B, 2D | 0.4~3.0 | 1000 | 1219 | 1250 | 1500 | 1800 | 2000 |
- Magnetic ferritic stainless steel without nickel and molybdenum, featuring high chromium content
- High inter-granular corrosion resistance with excellent formability and weldability
- Superior pitting and crevice corrosion resistance with good thermal stability
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N | Others |
|---|---|---|---|---|---|---|---|---|---|---|
| 443 | 0.025 | 1.0 | 0.04 | 0.03 | 1.0 | 20.0-23.0 | 0.5 | - | 0.025 | (Ti+Cb)83(C+N) min, 0.80 max. Cu: 0.3-0.8 |
| Finish Type | Description | Applications |
|---|---|---|
| NO.2B | Luster > NO.2D | After NO.2D treatment, light cold roll after polishing roller | General material applications |
| BA | Bright | Nonstandard, typically bright annealed surface finish with high reflectivity | Building materials, kitchen utensils |
| NO.4 | Intermediate grinding | Polished surface obtained by grinding with 150~180# abrasive strip | Building materials, kitchen utensils |
- Pipes covered with wooden plates for transportation protection
- All pipes loaded in strong wooden packages
- Cartons secured with proper shoring and strengthening
- Container loading documentation with sealed containers
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