Appearance requirements of carbon structure hot-rolled steel strip

The surface of the steel strip should be smooth and clean without cracks, folds, delaminations, pores, non-metallic inclusions, coarse burrs and scales. I Allow depth or height not greater than half of the allowable thickness deviation (height refers to positive deviation, depth refers to negative deviation) Locally small pits, scratches, pits, bumps and erythema no greater than the depth of recognition. Surface and side defects of the steel strip are allowed to be removed, and the removal depth of the same section shall not exceed the allowable negative deviation of thickness and width. There shall be no cracked edges on the side of the steel belt, slight burrs are allowed, and the depth shall not be greater than 1/5 of the allowable negative deviation of the width.