Cold-rolled requirement coils is mainly used for special extra deep drawing quality,non-aging , such as auto parts and electrical parts which demand has higher ductility.
| Quality | Testing direction | Material-No. | Yield point Rp0,2 (MPa) | Tensile strength Rm (MPA) | Elongation A80 (in %) min. | r-Value 90° min. | n-Value 90° min. | Old Description |
|---|---|---|---|---|---|---|---|---|
| DC01 | Q | 1.0330 | ≤280 | 270 - 410 | 28 | St 12-03 | ||
| DC03 | Q | 1.0347 | ≤240 | 270 - 370 | 34 | 1,30 | St 13-03 | |
| DC04 | Q | 1.0338 | ≤210 | 270 - 350 | 38 | 1,60 | 0,18 | St 14-03 |
Cold-rolled requirement coils are a steel product produced by applying plastic deformation to hot-rolled steel on cold-rolling mills. The requirement of r90 and n90 values apply only to products with the thickness not less than 0.50mm. When the the thickness is more than 2.00mm, the value of r90 is allowed to lower 0.2.
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