Surface
| bright finish1) | - roughness Ra = max. 0.35 µm; |
| light finish1) | - roughness Ra = 0.25 - 0.45 µm; |
| stone finish | - roughness Ra = 0.35 - 0.60 µm; |
| silver finish2) | - roughness Ra = 0.90 - 1.50 µm; |
| 1) only single reduced 2) in process of development |
|
Surface treatment
| non-oiled 1) | – by agreement, without flatness guarantee; |
| oiled | – DOS (Dioctyl Sebacate) 3,0 – 15,0 mg.m-2/side |
| passivation 2) | – 311 (CDC – Cathodic Sodium Bichromate) 4.0 - 9.0 mg.m-2/side, |
| – 300 (SCDC) 1.3 mg.m-2/side | |
| 1) only black sheets 2) only tinned sheets |
|
Weight of tin surface
| Tin layer | Weight of tin layer (g.m-2) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
normal E |
1.0 | 1.4 | 2.0 | 2.8 | 4.0 | 5.6 | 8.4 | 11.2 | ||||||
differential D |
1.0 / 2.0 | 5.6 / 2.8 | 8.4 / 2.8 | 8.4 / 5.6 | 11.2 / 5.6 | 11.2 / 8.4 | ||||||||
Tolerances of tin coat (g.m-2)
| EN 10203/91 | EN 10202/01 | |||
|---|---|---|---|---|
| Extent of tin coat | Tolerances | Nominal value of tin coat |
minimum | maximum 1) |
| 1.0 - 1.4 | -0.25 | 1.0 | 0.75 | 1.80 |
| 1.5 - 2.7 | -0.30 | 1.4 | 1.10 | 2.30 |
| 2.8 - 4.0 | -0.35 | 2.0 | 1.60 | 3.00 |
| 4.1 - 7.5 | -0.50 | 2.8 | 2.30 | 3.90 |
| 7.6 - 10.0 | -0.65 | 4.0 | 3.35 | 5.30 |
| 10.1 and more | -0.90 | 5.6 | 4.70 | 7.20 |
| 8.4 | 7.15 | |||
| 11.2 | 9.55 | |||
| 1) Required only for high-speed welded products. | ||||
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