When there requirement DC05 Cold steel coil is no significant yield, RP0.2 should be used; otherwise ReL should be used. When the thickness is more than 0.50mm and not more than 0.70mm, the specified value of the yield strength is allowed to increase 20MPa; when the thickness is not more than 0.50mm, the specified value of the yield strength is allowed to increase 40MPa.
The sample is the P6 sample in GB/T 228 and the sample direction is transverse.
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.
requirement DC05 Cold steel coilChemical Component
| Chemical elements | C | Mn | P | S | Al |
| Percentage | ≤0.08 | ≤0.40 | ≤0.025 | ≤0.020 | ≥0.015 |
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