The permissible range of angle geometry deviation is also specified in the standard, generally including curvature, side width, side thickness, top angle, theoretical weight and other items, and provides that the angle shall not have a significant twist.
1) Test methods.
① Tensile test method. Commonly used standard test methods are GB/T228-87, JISZ2201, JISZ2241, ASTMA370, ГОСТ1497, BS18, DIN50145, etc..
② Bending test method. Commonly used standard test methods are GB/T232-88, JISZ2204, JISZ2248, ASTME290, ГОСТ14019, DIN50111, etc.
(2) performance indicators: the test items to assess the performance of angle steel are mainly tensile test and bending test. Indicators include yield point, tensile strength, elongation and bending qualified items.
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