When inspecting steel bars, the first thing to do is to check the brand number and quality certificate of the steel bars; secondly, to check the appearance, take 5% of the steel bars from each batch, and check that there must be no cracks, wounds, or laminations on the surface, and the bumps on the surface of the steel bars must not exceed the horizontal limit. The height of the rib, the depth and height of the defect shall not be greater than the allowable deviation of the location, and the curvature of the steel bar per meter shall not be greater than four millimeters; for the next mechanical property test, if each batch is less than 60 tons, 2 pieces will be extracted from each batch. Cut two sections and conduct tensile and cold bending tests respectively. When intercepting the test piece, 100-500mm from both ends of the steel bar should be removed. When the test piece is larger than 60 tons, the corresponding steel bars must be removed. If a test result does not meet the requirements, double the number of samples from the same batch shall be taken for each test. If there is still one unqualified sample, the batch of steel bars is deemed unqualified. If the hot-rolled steel bars suffer from brittle fracture, poor welding performance or significantly abnormal mechanical properties during processing, chemical composition analysis and other special inspections should be carried out.

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