When there is suspicion of potential embrittlement of a product, it may be necessary to test a small group of the products to measure the ductility according to the protocol in the specification ASTM A143/A143M. These tests are usually destructive to the zinc coating and possibly to the product as well. Depending on the service conditions the product will be exposed to, one of three embrittlement tests - similar bend radius test, sharp blow test, and steel angle test - may need to be performed. The embrittlement test uses a known force to provide a stress that should be lower than the yield stress of the part. If there is a fracture or permanent damage created during the testing process, the parts must be rejected.