ASME SB-26-2019 pdf download.Aluminum-Alloy Sand Castings.
6. Manufacture 6.1 The responsibility of furmishing castings that can be laid out and machined to the finished dimensions within the permissible variations specified, as shown on the blueprints or drawings, shall rest with the producer, except where pattern equipment is furnished by the purchaser.
7. Chemical Composition 7.1 The Product shall conform to the chemical composition limits prescribed in Table l. Conformance shall be determined by the producer by taking samples at the time castings are poured in accordance with Practice E716 and analyzed in accordance with Test Methods E607， E1251， or E34， or EN 14242. If the producer has determined the composition of the material during casting, they shall not be required to sample and analyze the finished product. 7.2 If it becomes necessary to analyze castings for confor- mance to chemical composition limits, the method used to sample castings for the determination of chemical composition shall be by agreement between the producer and the purchaser. Analysis shall be performed in accordance with Practice E716, Test Methods E607， E1251， or E34， or EN 14242 (ICP method). 7.3 Other methods of analysis or in the case of a dispute the method of analysis shall be agreed upon by the producer and the purchaser. 7.4 A sample for determining of chemical composition shall be taken to represent the following: 7.4.1 Not more than 4000 lb [2000 kg] of clean castings (gates and risers removed) or a single casting poured from one furnace. 7.4.2 The maximum elapsed time between determinations shall be established for each alloy, but in any case the maximum elapsed time shall not exceed 8 h.
8. Material Requirements- Castings Produced for Governmental and Military Agencies 8.1 Unless otherwise specified, only aluminum alloy con- forming to the requirements of Specification B 179 or produc- er's foundry scrap (identified as being made from alloy conforming to Specification B 179) shall be used in the remelt- ing furnace from which molten metal is taken for pouring directly into castings. Additions of small amounts of modifiers and grain refining elements or alloys are permitted. 8.1.1 Pure materials, recycled materials, and master alloys may be used to make alloys conforming to this specification, provided chemical analysis can be taken and adjusted to conform to Table 1 prior to pouring any castings.
9. Foundry Control- Castings Produced for Governmental or Military Agencies, or Both 9.1 When specified, castings shall be produced under foundry control approved by the purchaser. Foundry control shall consist of examination of castings by radiographic or other approved methods for determining internal discontinui- ties until the gating, pouring, and other foundry practices have been established to produce castings meeting the quality standards furnished by the purchaser or agreed upon between the purchaser and the producer. When foundry practices have been so established, the production method shall not be significantly changed without demonstrating to the satisfaction of the purchaser that the change does not adversely affect the quality of the castings. Minor changes in pouring temperature of +50°F [+28°C] from the established nominal temperature are permissible.ASME SB-26 pdf download.