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Steel forgings
  • BS ISO 15461:2018 pdf free.Steel forgings一Testing frequency, sampling conditions and test methods for mechanical tests. 5.1 For the testing frequency of room temperature tensile tests and of impact tests, the requirements given in JJ1 to apply. 5.1.1 The product standard or order shall specify, by reference to the appropriate symbol(s) in Table 1. column 1, the following: a) the composition of the test unit as defined in Table 1. columns 2 to 8; b) whether uniformity checks by hardness tests in accordance with Table 1. column 9 are required and, if so, the percentage of products to be subjected to the hardness tests; c) the number of sample products to be taken from the test unit. (See the explanations in Table 1. footnote a, for replacing the letter “n of the symbol by the mass of the test unit up to which the taking of one sample product is sufficient.) NOTE Less stringent requirements for the composition of the test unit can be compensated by more stringent requirements for the number of sample products to be tested. Therefore, for example, a test unit characterized by the symbol CH5 can be regarded as equivalent to a test unit characterized by the…