countershaft boxYongxing foundry is a collection of casting, machining large-scale foundry enterprises...
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Cylinders bodyYongxing foundry is a collection of casting, machining large-scale foundry enterprises...Gray iron castings retest condition is if the first test results can not meet the requirements of the mechanical properties of the material, allowed to repeat the test, how to test whether it is effective.
The test can be tested by the following ways: if it is not due to the quality of the casting itself, but the results do not meet the requirements of the following reasons, the test results are invalid:
1. The test specimen in the test machine is not properly installed on the test machine or improper operation
2. The surface of the sample has the defects of casting defects or sample processing (such as transition fillet, surface roughness and the size of the different requirements, etc.)
3. There is obvious casting defects on the end of the tensile specimen in the tensile test specimen.
In the above case, re sampling from the same test block or re sampling from the same batch of cast samples shall be re tested.
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