ASTM A370:17 pdf download

ASTM A370:17 pdf download.Standard Test Methods and Definitions for Mechanical Testing of Steel Products.
18.3 Test Blocks—Machines should be checked to make certain they are in good order by means of standardized Rockwell test blocks.
18.4 Detailed Procedure—For detailed requirements of this test, reference shall be made to the latest revision of Test Methods E 18.
19. Portable Hardness Test
19.1 Although this standard generally prefers the use of fixed-location Brinell or Rockwell hardness test methods, it is not always possible to perform the hardness test using such equipment due to the part size, location, or other logistical reasons. In this event, hardness testing using portable equipment as described in Test Methods A956, A1038, and EllO shall be used with strict compliance for reporting the test results in accordance with the selected standard (see examples below). Standard Practice A833 may be used, although it might not always be suitable as a criterion for acceptance or rejection since Practice A833 does not contain a precision and bias statement.
19.1.1 Practice A833—The measured hardness number shall be reported in accordance with the standard methods and given the HBC designation followed by the comparative test bar hardness to indicate that it was determined by a portable comparative hardness tester, as in the following example:
19.1.1.1 232 HBC’/240 where 232 is the hardness test result using the portable comparative test method (HBC) and 240 is the Brinell hardness of the comparative test bar.
19.1.2 Test Method A956.
19.1.2.1 The measured hardness number shall be reported in accordance with the standard methods and appended with a Leeb impact device in parenthesis to indicate that it was determined by a portable hardness tester, as in the following example:
(1) 350 HLD where 350 is the hardness test result using the portable Leeb hardness test method with the HLD impact device.
19.1.2.2 When hardness values converted from the Leeb number are reported, the portable instrument used shall be reported in parentheses, for example:
(1) 350 HB (HLD) where the original hardness test was performed using the portable Leeb hardness test method with the HLD impact device and converted to the Brinell hardness value (HB)
19. 1 .3 Test Method A 1038—The measured hardness number shall be reported in accordance with the standard methods and appended with UCI in parenthesis to indicate that it was determined by a portable hardness tester, as in the following example:
19.1.3.1 446 HV (UCI) 10 where 446 is the hardness test result using the portable UCI test method under a force of 10 kgf.
19.1.4 Test Method EllO—The measured hardness number shall be reported in accordance with the standard methods and appended with a IP to indicate that it was determined by a portable hardness tester, as follows:
19.1.4.1 Rockwell Hardness Examples.