Chromium-coated steel sheet,commercially known as Tin Free Steel (TFS),is a cold-rolled steel substrate electrolytically coated with a dual layer of metallic chromium and chromium oxide.
It exhibits exceptional adhesion for organic coatings,high corrosion resistance,and tunable hardness.While unsuitable for soldering,it is widely used in metal packaging (e.g.,can ends,food containers),industrial components, and decorative hardware due to its cost efficiency and surface durability.
| Product Name | Chrome-Coated Steel (Tin Free Steel - TFS) |
| Thickness | 0.15-0.5 |
| Width | 400-1050 |
| Hardness Grade (HR30Tm) | T-1: 49±4 |
| T-2: 53±4 | |
| T-3: 57±4 | |
| T-4: 61±4 | |
| T-5: 65±4 | |
| DR7：71±4 | |
| DR8：73±4 | |
| DR9：76±4 | |
| Chromium Content | Metallic Chromium Layer: 50 - 150 mg/m² (Min. Avg. - Max. Avg.) |
| Chromium Oxide Layer: 3 - 35 mg/m² (Min. Avg. - Max. Avg.) | |
| Surface Treatment | Oiling: DOS oil coating |
| Surface Finish: Bright (0.2μm-0.35μm),Stone (0.3μm-0.45μm),Silver (1.8μm-2.0μm) | |
| Primary Application | Metal Packaging |
| food can ends,crown caps,oil cans,paint cans, | |
| chemical cans,aerosol cans,gift tins,printed cans. | |
| Industrial Parts and Structural Components | |
| Automotive parts, mechanical structural components,battery casings,certain electrical components | |
| Decoration and Daily Hardware | |
| Furniture accessories (table and chair legs, brackets),architectural trim,door handles,lighting fixtures,daily hardware items |
