No heating is carried out in the production process, so there are no defects such as pitting and scale which often occur in hot rolling, and the surface quality is good and the smoothness is high.
Grade | Yield Strengtha ReL/（MPa） | Tensile Strength Rm/（MPa） | Elongationb A50（%） （L0=50mm，b=25mm） |
CR550/980QP | 550～750 | ≥980 | ≥18 |
Note：a. Taking Rp0.2 in case of indistinct yield, otherwise ReL b. Using P7 sample by reference to GB/T 228.1, perpendicular to the direction of rolling. | |||
The standards applied in different countries to set the requirements for cold-rolled steel, such as EN 10130, EN 10268, EN 10209, ASTM A1008 / A1008M, DSTU 2834, GOST 16523, GOST 9045, GOST 17066 and others, specify steel grades and size ranges for cold-rolled coils, their application (profiling, cold forming, enamelling, general use, etc), mechanical properties, surface quality and other parameters.
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