ASTM-A105/A105M:18 pdf free download – Standard Specification for Carbon Steel Forgings for Piping Applications.
8.3.3 Tcsting shall be performed as specified in Specificalion A961/A961M. The largest feasible round specimen shall be used except when hollow cylindrically shaped parts are machined from seamless tuhulars. When hollow cylindrically shaped parts are machined from seamless tubular materials. strip tests may be used. The tension test specimen shall be obtained from a production forging, or from an integral prolongation representative of the hub location of a flange. or (he heaviest cross section of a fitting, valve, or other part within the scope of this specification.
8.3.4 Forgings too small to permit obtaining a subsize specimen of 0.250 in. 16.35 rnml diameter or larger parallel to the dimension of maximum working. and produced in equipment unsuitable for the production of a separately forged test bar such as an automatic or semi-automatic press. may be accepted on the basis of hardness only. One percent of the lorgings per lot, where a lot is the product from a heat, or, if heat treated, the product of a heat per furnace charge, or ten forgings, whichever is the lesser number, shall be selected at random, prepared. and tested using the standard Brinell test. The locations of the indentations shall be at the opfion of the manufacturer but shall be selected to be representative of the forging as a whole. One indentation per forging shall be required hut additional indentations may be made to establish the representative hardness. The hardness of all forgings so tested shall be 137 to 197 HBW inclusive.
8.4 Hardness Tesis:
8.4.1 Two hardness tests shall be made for each heat of as-forged components. When more than one forging is produced from each heat, a minimum of two forgings shall be tested with one reading from each forging. When only one forging is produced. it shall be tested in two locations.
8.4.2 Except when only one forging is produced, a minimum of two forgings shall be hardness tested per batch or continuous run as defined in 8.3.2.2 to ensure that forgings are within the hardness limits given in Table 2. When only one forging is produced. it shall be hardness tested in two locations to ensure it is within the hardness limits given in Table 2.
8.4.3 Testing shall be as specified in Specification A961/ A961M. The purchaser may verify that the requirement has been met by testing at any location on the forging. provided such testing does not render the forging useless.
9. Hydrostatic Tests
9.1 Such tests shall be conducted by the forging manufacWrer only when Supplementary Requirement S57 in Specification A961/A96IM is specified.
10. Retreatment
10.1 If the results of the mechanical tests do not conform to the requirement specified, the manufacturer may heat treat or reheat treat the forgings as applicable and repeat the test specified in Section 8.