Quality inspection of angle steel includes dimensional inspection, where the length of the legs, thickness, and overall length are measured to ensure they meet the standard requirements. Mechanical property inspection is essential, involving tests for yield strength, tensile strength, and elongation to verify its load - bearing capacity. Surface quality inspection checks for defects such as cracks, folds, and rust. Chemical composition analysis is carried out to ensure that the steel contains the appropriate proportion of elements, which affects its performance. Non - destructive testing methods, like ultrasonic testing, can be used to detect internal defects without damaging the angle steel.