The flattening test can evaluate the extrusion performance of metal tubes in a static state to determine their strength and pressure resistance.
Place the sample between the two pressure plates of the testing machine. Note that the edges of the sample can be rounded or chamfered by filing or other methods; the width of the pressure plate should exceed the width of the sample after flattening.
Move the pressure plate perpendicular to the longitudinal axis of the tube for flattening. The movement rate of the pressure plate should not exceed 25mm/min.
After the test, observe the sample. If there is no visible crack without a magnifying glass, it should be evaluated as qualified; if there is only a slight crack at the corner of the sample, it should not be used as a basis for scrapping.
