ASTM B240–98

Designation: B 240 – 98e1 Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings1 This standard is issued under the fixed designation B 240; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. e1 NOTE—The caveat in section 1.4 and section 3. Terminology were added editorially in December 2000. 1. Scope 1.1 This specification covers commercial zinc and zinc- aluminum (ZA) alloys in ingot form for remelting for the manufacture of pressure die castings and foundry castings as designated and specified in Table 1. Seven alloy compositions are specified, designated as follows: UNSA ASTMA Common Z33521 AG 40A Alloy 3 Z33522 AG 40B Alloy 7 Z35530 AC 41A Alloy 5 Z35540 AC 43A Alloy 2 Z35635 ZA-8 Z35630 ZA-12 Z35840 ZA-27 1.2 Zinc alloys Z33521, Z33522, Z35530, and Z35540 are used primarily for remelting in the manufacture of pressure die castings. Zinc-aluminum alloys Z35635, Z35630, and Z35840 are used for remelting in the manufacture of both foundry and pressure die castings. Castings made from these ingots are specified in ASTM B86, Standard Specification for Zinc and Zinc-Aluminum Alloys for Foundry and Die Castings. 1.3 The values stated in inch-pound units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Data Sheet for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limi- tations prior to use. 2. Referenced Documents 2.1 The following documents of the issue in effect on data of order acceptance form a part of this specification to the extent referenced herein: 2.2 ASTM Standards: B 86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy foundry and Die Castings2 B 275 Practice for Codification of Certain Nonferrous Met- als and Alloys, Cast and Wrought3 B 899 Terminology Relating to Non-ferrous Metals and Alloys2 E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications4 E 47 Test Methods for Chemical Analysis of Zinc Die- Casting Alloys5 E 88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition5 E 527 Practice for Numbering Metals and Alloys (UNS)6 E 536 Test Method for Chemical Analysis of Zinc and Zinc Alloys7 E 634 Practice for Sampling of Zinc and Zinc Alloys for Optical Emission Spectrochemical Analysis7 2.3 Other ASTM Document: Methods for Emission Spectrochemical Analysis8 3. Terminology 3.1 Terms shall be defined in accordance with Terminology B 899. 4. Ordering Information 4.1 Orders for ingot under this specification shall include the following information: 4.1.1 Quantity in pounds, 4.1.2 Alloy (Table 1), 4.1.3 Size, if not manufacturer’s standard, 4.1.4 Specification number and date, 4.1.5 Source inspection (Section 9), 4.1.6 Marking (Section 11), and 4.1.7 Whether certification is required (Section 12). 1 This specification is under the jurisdiction of ASTM Committee B-2 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zinc and Cadmium. Current edition approved Apr. 10, 1998. Published September 1998. Originally published as two separate Standards, B 240-49, last previous edition B 240-94 and B669-80, last previous edition B 669-84. 2 Annual Book of ASTM Standards, Vol 02.04. 3 Annual Book of ASTM Standards, Vol 02.02. 4 Annual Book of ASTM Standards, Vol 14.02. 5 Annual Book of ASTM Standards, Vol 03.05. 6 Annual Book of ASTM Standards, Vol 01.01. 7 Annual Book of ASTM Standards, Vol 03.06. 8 Available from ASTM Headquarters, 1916 Race St., Philadelphia, PA 19103, PCN 03-502071-39. 1 Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. NOTICE: This standard has either been superseded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information. 5. Materials and Manufacturer 5.1 The material covered by this specification shall be of uniform quality and reasonably free from dross, adhering foreign matter, and surface oxide. 6. Chemical Requirements 6.1 The ingots shall conform to the requirements as to chemical composition prescribed in Table 1. Conformance shall be determined by the manufacturer by analyzing samples taken at the time the ingots are poured or samples taken from the ingots. Unless otherwise agreed in the contact or purchase order, sampling procedure will be the manufacturer’s choice. 7. Sampling for Determination of Chemical Composition 7.1 In the event of a dispute, if the ingots are shipped in carload lots of the same alloy, not less than five ingots shall be taken at random from the carload for sampling. If the shipment is less than a carload lot, one sample ingot shall be taken for each 10,000 lb. (4500 kg) or fraction thereof. Either party may request that a sample be taken from each melt of 1000 lb. (450 kg) or more. 7.2 The samples for chemical analysis shall be taken by sawing, milling, or drilling in such a manner as to be representative of the average cross section of the ingot. The weight of a prepared sample shall be not less than 75 g in accordance with Practice E 88. 7.3 The saw drill, or cutter used for taking the sample shall be thoroughly cleaned. No lubricant shall be used in the operation, and the sawings or metal chips shall be carefully treated with a magnet to remove any particles or iron intro- duced in taking the sample by the method prescribed in 7.2. 7.4 An optional method of sampling for analysis may be by melting together representative portions of each ingot selected and then sampling the liquid composite by casting suitable specimens for either spectrographic or chemical analysis. 7.5 Samples for Spectrochemical and Other Methods of Analysis—Samples for spectrochemical and other methods of analysis shall be suitable for the form of material being analyzed and the type of analytical method used. 8. Methods for Chemical Analysis 8.1 The determination of chemical composition shall be made in accordance with suitable chemical (Test Methods E 536 or E 47 for tin) or other methods. In case of dispute, the results secured by Test Methods E 536 and Test Method E 47 for tin, or by a method agreed upon by both parties, shall be the basis of acceptance. 8.2 For purposes of determining compliance with specified composition limits as given in Table 1, an observed or calculated value shall be rounded to the nearest unit in the last right-hand place of figures shown in Table 1, in accordance with the rounding method of Practice E 29. 9. Source Inspection 9.1 If the purchaser desires that his representative inspect or witness the inspections and testing of the product prior to shipment, such agreement shall be made by the purchaser and producer or supplier as part of the contract or purchase order. 9.2 When such inspection or witness of inspection and testing is agreed upon, the producer or supplier shall afford the purchaser’s representative all reasonable facilities to satisfy him that the product meets the requirements of this specifica- tion. Inspection and tests shall be conducted so there is no unnecessary interference with the producer’s operations. 10. Rejection and Rehearing 10.1 Material that fails to conform to the requirements of this specification may be rejected. Rejection should be reported to the producer or supplier promptly and in writing. In case of dissatisfaction with the results of the test, the producer or supplier may make claim for a rehearing. If the rehearing establishes that the material does not conform to the require- ments of this specification, as much of the rejected original material as possible shall be returned to the producer or supplier. TABLE 1 Chemical Requirements Element Z33521 Z33522 Z35530 Z35540 Z35635 Z35630 Z35840 (AG40A)A,B,C,D (AG40B)A,B,C,D (AC41A)A,B,C,D (AC43A)A,B,C,D B,C,E B,C,E B,C,E ALLOY 3 ALLOY 7 ALLOY 5 ALLOY 2 ZA-8 ZA-12 ZA-27 Aluminum 3.9-4.3 3.9-4.3 3.9-4.3 3.9-4.3 8.2-8.8 10.8-11.5 25.5-28.0 Magnesium 0.025-0.05 0.010-0.020 0.03-0.06 0.025-0.05 0.020-0.030 0.020-0.030 0.012-0.020 Copper 0.10 max 0.10 max 0.75-1.25 2.6-2.9 0.8-1.3 0.5-1.2 2.0-2.5 Iron, Max 0.075 0.075 0.075 0.075 0.065 0.065 0.072 Lead, Max 0.004 0.0020 0.004 0.004 0.005 0.005 0.005 Cadmium, Max 0.003 0.0020 0.003 0.003 0.005 0.005 0.005 Tin, Max 0.002 0.0010 0.002 0.002 0.002 0.002 0.002 Nickel - - - 0.005-0.020 - - - - - - - - - - - - - - - ZincF Remainder Remainder Remainder Remainder Remainder Remainder Remainder AZinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in amounts of up to 0.02, 0.02, 0.035 and 0.05 %, respectively. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements, except that nickel analysis is required for Z33522. BASTM alloy designations were established in accordance with Practice B 275. UNS assignations were established in accordance with Practice E 527. The last digit of a UNS number differentiates between alloys of similar composition. UNS designations for ingot and casting versions of an alloy were not assigned in the same sequence for all alloys. CFor purposes of acceptance and rejection, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures, used in expressing the specified limit, in accordance with the rounding procedure prescribed in Practice E 29. DWhen this material is required to conform to ISO Standard 301, the chemical limits for thallium and indium each shall not exceed 0.001 %. EZinc-aluminum ingot for foundry and pressure die casting may contain nickel, chromium, and manganese in amounts of up to 0.01 % each or 0.03 % total. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements. FDetermined arithmetically by difference. B 240 2 11. Identification Marking 11.1 All ingots shall be properly marked for identification with the producer’s name or brand. 11.2 Each bundle or skid shall be identified with the producer’s heat, lot, or other identification mark. 12. Certification 12.1 When specified in the purchase order or contract, a producer’s or supplier’s certification shall be furnished to the purchaser that the material was manufactured, sampled tested and inspected in accordance with this specification and has been found to meet the requirements. When specified in the purchase order or contract, a report of the test result shall be furnished. 13. Preparation for Delivery 13.1 Packaging—Unless otherwise specified, the ingot shall be packaged to provide adequate protection during normal handling and transportation. Each package shall contain only one alloy unless otherwise agreed upon. 14. Keywords 14.1 casting alloys; die casting alloys; foundry alloys; zinc; zinc alloy ingots; zinc alloys; zinc aluminum alloys; ZA The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. 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