ASTM A673:17 pdf download

ASTM A673:17 pdf download.Standard Specification for Sampling Procedure for lmpact Testing of Structural Steel.
4.3 For shapes with a flange thickness equal to or greater than 1 1/2 in. j38. 1 mm], where alternate core location testing is specified in the purchase order, the longitudinal axis of each specimen shall be located midway between the inner flange surface and the center of the flange thickness at the intersection with the web mid-thickness (see Fig. 3).
4.4 The absorbed energy values obtained for subsize specimens shall not be less than the applicable values given in Table 1, which are proportional to the absorbed energy values required for full-size specimens.
4.5 Except as allowed by 4.6, the test temperature shall be as specified in the purchase order.
4.6 The manufacturer or processor shall have the option of using a lower test temperature than is specified in the purchase order, provided that the absorbed energy values specified in the purchase order are met.
4.7 The actual test temperature used shall he reported with the test results.
5. Frequency of Testing
5. 1 Frequency (H) Heat Testing for Plates, Shapes, (111(1 Bars—One impact test (a set of three specimens) shall be made for each 50 tons [45 Mg] of the same type of product subject to the requirements of this specification produced on the same mill from the same heat of steel. When multiple impact tests are required, the impact test(s) shall he taken from different as-rolled or heat-treated pieces. Impact specimens shall he selected from the thickest material rolled subject to the following modifications: When material rolled up to 2 in. [50 mm] inclusive in thickness differs 3/x in. [10 mm] or more in thickness, one impact test shall be made from both the thickest and thinnest material rolled. When material rolled over 2 in. 150 mmj in thickness differs 1 in. [25 mm] or more in thickness, one impact test shall be made from both the thickest and thinnest material rolled that is more than 2 in. [50 mm] in thickness. If insufficient pieces of the thickest or thinnest material arc produced to permit compliance with the above, then testing may proceed to the next nearest thickness available. When plates are produced from coils, a minimum of three impact tests shall be taken from each qualifying coil (see 4.2). One such coil shall be tested for each 50 tons [45 Mg] of the same product produced on the same mill from the same heat of steel. When material from one heat differs /6 in. [2 mm] ormore in thickness, tests shall be made from both the thickestand thinnest material rolled regardless of the number of coils represented.