Surface quality requirements for low alloy high strength steel plates
The surface of the steel plate should be free of bubbles, scars, cracks, folds, inclusions, and pressed iron oxide scales that would affect its use and other harmful defects. Steel plates should not have visible delamination.
The surface of the steel plate is allowed to have thin layers of iron oxide scale and rust that do not hinder the inspection of surface defects, as well as inconspicuous roughness, reticulation, pitting, scratches and other local defects caused by pressing into the iron oxide scale and rollers, but their depth should not be It is greater than half the tolerance of the steel plate thickness, and the minimum allowable thickness of the steel plate should be guaranteed.
Defects on the surface of the steel plate are allowed to be removed by grinding and other methods. The cleaned area should be smooth and without edges. The cleaning depth should not be greater than the negative deviation of the steel plate thickness, and the minimum allowable thickness of the steel plate should be ensured.
When there are defects on the surface of the steel plate that cannot be cleaned by grinding and other methods, appropriate welding methods can be used.
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