ASTM B26/B26M-12 pdf free download.Standard Specification for Aluminum-Alloy Sand Castings.
1 .1 This specification covers aluminum-alloy sand castings designated as shown in Table I.
1 .2 This specification is for aluminum-alloy sand castings used in general purpose applications. It may not address the mechanical properties, integrity testing. and verification required for highly loaded or safety critical applications.
1.3 Alloy and temper designations are in accordance with ANSI H35.l/H35.IM. Unified Numbering System alloy designations are in accordance with Practice E527.
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex Al and Annex A2.
1.6 The values stated in either SI units or inch-pound units are to he regarded separately as standard. The values stated in each system may not be exact equivalents: therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
4.2.3 Whether test specimens cut from castings are required in addition to, or instead of, separately cast specimens (Seclions 10 and 13);
4.2.4 Whether heat treatment is to he performed in accordance with AMS 2771 (sec Section 15).
4.2.5 Whether repairs are permissible (16.1).
4.2.6 Whether inspection is required at the producer’s works (Section 18);
4.2.7 Whether certification is required (21.1);
4.2.8 Whether surface requirements shall be checked against observational standards where such standards are established (19.1);
4.2.9 Whether liquid penetrant inspection is required (19.2);
4.2.10 Whether radiographic inspection is required and, if so, the radiographic grade of casting required (19.3, Table 3);
4.2.11 Whether foundry control is required (Section 9); and
4.2.12 Whether Practice B66() applies and, if so, the levels of preservation, packaging. and packing required (23.4).
5. Quality Assurance
5.1 Unless otherwise specified in the contract or purchase order, the producer shall be responsible for the performance of all inspections and test requirements specified herein. Unless disapproved by the purchaser. the producer may use his own or any other suitable facilities for the performance of the inspection and test requirements specified herein. The purchaser shall have the right to perform any of the inspections and tests set forth in this specification where such inspections are deemed necessary to confirm that the material conforms to prescribed requirements.
6. Manufacture
6.1 The responsibility of furnishing castings that can he 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.ASTM B26/B26M pdf download.