Carbon hot-rolled steel structure with cosmetic requirements

Steel strip surface should be smooth, can not have crack, folding, lamination, porosity and non-metal inclusion, coarse I allowed to have depth or burrs and scale height is not greater than the thickness of allowable deviation of half of the ( Highly correct deviation, depth refers to the negative deviation) Local small pits, scratches, pitting, bump and depth is not greater than bin's minimalist technique of recognize (1) of the spots. Allows removal of the surface of the steel belt and lateral defects, thickness and width is not more than the same cross section removal depth to allow negative deviation. Steel strip profile may not have cracked edges, allowing a slight burrs, the depth is not more than 1/5 of the width to allow negative deviation.