Sus304 Sus321 Hollow High Pressure Stainless Steel Rectangular Pipe AISI JIS
How to Remove Scratches from Stainless Steel
Deeper scratches, meet your match: Sandpaper. A piece of wet fine-grit sandpaper can be used to remove deeper scratches. Make sure to always keep it wet, and follow up with a rubbing compound.
Start with the scratch and then blend it in. Determine the direction of the grain and start sanding in one direction only, following the brushed pattern. Don’t sand back and forth and NEVER sand against the grain. If you need to use a courser-grit paper to remove deeper scratches, follow up with a finer grit, and then finally a rubbing compound.
The sanding technique only works on plain (uncoated) stainless steel panels: Don’t try it on simulated stainless steel or stainless panels with a fingerprint-resistant clear coat.
Clean and Polish
After removing scratches and unwanted marks, you can then clean and polish your stainless-steel appliance. With a clean microfiber cloth, wipe down the newly sanded surface. This will remove sanding and metal dust, as well as leftover polishing compound or water. Even when you're cleaning, it’s also important to rub and buff in the direction of the grain.
For best results, spray the surface of the metal with several sprays of vinegar, and then pull out another clean microfiber cloth to wipe the metal. The vinegar will clean the surface and remove all traces of other compounds and cleaners.
Stainless Steel Rectangular Pipe Specification
| Name | Sus304 Sus321 Hollow High Pressure Stainless Steel Rectangular Pipe AISI JIS |
| Items | 304/321L Stainless Steel |
| Standard | ASTM A554 |
| Material Grade | 304: Ni 8%, Cr 18% |
| Width | 18mm |
| Height | 24mm |
| Thickness | 1mm |
| Length | 6m, or as customers' request |
| Tolerance | a) Width,Height: +/- 0.2mm |
| | b) Thickness: +/- 0.03mm |
| | c) Length: +/- 5mm |
| Surface | annealing,pickling |
| | sandblasting |
| Application | industry,exhausting,welding,furniture,window |
| Test | Squash test, extended test, water pressure test,heat treatment, NDT |
Elemental comparison of the different materials
| Chemical Composition of Material | Material | 201 | 316L | 304 |
| C | ≤0.15 | ≤0.035 | ≤0.08 |
| Si | ≤1.00 | ≤1.00 | ≤1.00 |
| Mn | 5.5-7.5 | 2 | ≤2.00 |
| P | ≤0.06 | ≤0.045 | ≤0.045 |
| S | ≤0.03 | ≤0.03 | ≤0.03 |
| Cr | 16-18 | 16-18 | 18-20 |
| Ni | 3.5-5.5 | 10-14 | 8-11 |
| Mechanical Property | Material Item | 201 | 202 | |
| Tensile Strength | ≥535 | ≥520 | |
| Yield Strength | ≥245 | ≥205 | |
| Extension | ≥30% | ≥30% | |
| Hardness (HV) | <253 | <253 | |
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Sus304 Sus321 Hollow High Pressure Stainless Steel Rectangular Pipe AISI JIS Images
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