Home > Products > Tin-free Steel (Hi-Top) > Characteristics
Tin Free Steel (Hi-Top)
Standards
| Hi-Top is manufactured under strict quality controls based on standards specified in JIS G 3315. |
Tempering (Temper Grade) |
| Tempering Codes | Target Hardness (HR-30T) |
Features | Main Uses | |
|---|---|---|---|---|
| Single press roll | T-1 | 49±3 | Extremely good flexibility | Deep tie cans and caps, etc. |
| T-2 | 53±3 | Middle level flexibility and toughness | General tie cans and lids, etc. | |
| T-2.5 | 55±3 | Equally strong flexibility and toughness | General food cans, etc. | |
| T-3 | 57±3 | Appropriate toughness | General food cans, etc. | |
| T-4 | 61±3 | Comparatively strong toughness | General can shell, drum, bottom, cap, etc. | |
| T-5 | 65±3 | Superb buckling resistance | Large cans and internal pressurized can use, etc. | |
| Double press roll | DR-8 | 73 | Superb rigidity and strength | Carbonated beverages, beer can shell use, etc. |
| DR-9 | 76 | ditto | Carbonated beverages, beer can lid use, etc. | |
| DR-9M | 77 | ditto | ditto | |
| DR-10 | 80 | Special class of rigidity and strength | 18-liter drum lid use, etc. |
Plating amount |
Units: mg/m² (single side) |
| Metallic chrome layer | Chrome hydrate oxidized layer | ||
|---|---|---|---|
| Minimum average adhesion |
Maximum average adhesion |
Minimum average adhesion |
Maximum average adhesion |
| 50 | 150 | 5 | 35 |
Surface finish |
| Surface finishing name | Code | Surface roughness Target value µmRa | Features |
|---|---|---|---|
| Bright | B | 0.25 | General purpose polished finish. |
| Light roughness side | BR | 0.30 | Light grinding stone finish used only for double press rolled products. |
| Silver 1 | R1 | 1.00 | Keeps beautiful surface with dull finish. |
| Matte | M | 1.00 | Non directional dull finish. |
