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Surface of ASTM-A573Gr70 steel plate

It is widely known that A573 Gr70 steel plate has high production requirements, but do you know that the surface of A573 Gr70 steel plate also has quality requirements? Visualization and calipers are commonly used to check whether the surface of A573 Gr70 steel plate meets the requirements of the finished product.

1. The surface of A573 Gr70 steel plate should be free of harmful defects such as bubbles, scabs, cracks, folds, inclusions, and pressed iron scales which affect its use.

2.A573 Gr70 steel plate should not have visible delamination. The surface of A573 Gr70 steel plate is allowed to have a thin layer of oxide scale, rust and other defects such as roughness, mesh, pitting, scratches.

3.The surface defects of A573 Gr70 steel plate can be removed by grinding and other methods. The cleaning area should be smooth without edges and corners, and the cleaning depth should not exceed the negative deviation of thickness for A573 Gr70 steel plate, and the allowable smaller thickness of A573 Gr70 steel plate should be ensured.