ASTM A263:2019 pdf download.Standard Specification for Stainless Chromium Steel-Clad Plate.
9.6 The bend test specimen used for bond strength determination shall be 1 ½ in. (38 mm) wide by not more than 3/4 in. (19 mm) in thickness and shall be machined to the form and dimensions shown in Fig. 2, or may be machined with both edges parallel. In reducing the thickness of the specimen, both the alloy cladding and the base steel shall be machined so as to maintain the same ratio of clad metal to base steel as is maintained in the plate, except that the thickness of the clad metal need not be reduced below ½ in. (3.1 mm). The sides of the bend test specimen used for bond strength determination may have the corners rounded to a radius not over 1/16 in. (1.6 mm) for plates, 2 in. (50 mm) and under in thickness, and not over ½ in. (3.1 mm) for plates over 2 in. (50 mm) in thickness.
10. Product Analysis
10.1 Product analysis may be required for the cladding alloy on the finished product. Chemical analysis may be accomplished by wet chemical or instrumental procedures. If wet chemical procedures are used, millings may be taken only when the composite plate thickness is sufficient to permit obtaining millings without danger of contamination from the adjacent layer. If spectrometric procedures are used, the sample shall be exposed on the center line of the cladding when there is sufficient cladding thickness available so that there is no contamination from the adjacent base metal.
10.2 If product analysis is specified by the purchaser for the cladding alloy, it shall he made from drillings or millings taken from the final piece or a broken test specimen. For wet chemical analysis, in order to avoid contamination by the base plate metal, millings of cladding samples shall be taken from the test coupon by removal and discard of all the base metal plate material, plus 40 % of the cladding thickness from the bonded side, not to exceed 1/16 in. (1.6 mm). The material shall be chemically cleaned and sufficient millings shall be taken to represent the full cross-section of the remainder. If there is insufficient cladding thickness available to spectrographically expose on the center line of the cladding without contamination, 50 % of the cladding shall be removed and the sample exposed on this surface.
10.3 Methods and practices relating to chemical analysis required by this specification shall be in accordance with the Test Methods, Practices, and Terminology of A75 1.
10.4 Results of the product analysis shall conform to the requirements of Section 7 of Specification A480/A480M.
10.5 Results of the product analysis for the hacking steel when required shall conform to the requirements of Section 7 of Specification A20/A2OM.
11. Permissible Variations
11.1 Permissible variations except for thickness shall he in accordance with Specification A20/A2OM.
11.2 Minimum thickness of the alloy cladding metal and of the backing steel, or of the total composite plate shall be as required by purchase order documents when ordered to minimum thicknesses.