1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW3344 Zinc Alloy Ingots for High Pressure Die Casting Copyright 2012 General Motors Company All Rights Reserved February 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope This material specification covers
2、commercial zinc alloys in ingot form for remelting for the manufacturing of high pressure die castings used in automotive applications and other allied industries. Zinc alloy ingots are specified by the chemical composition. 1.1 Material Description. These zinc alloy ingots are produced for use in h
3、igh pressure die casting. Each zinc ingot grade has a composition that aligns with, but is tighter than, the respective die cast grade. The various grades of pressure die cast zinc alloys can be referenced in GMW worldwide specification GMW3341. 1.1.1 Material Identification. This specification cove
4、rs the GMW3344 ingot grades listed below in Table 1 and the commercial alloy that each ingot will ultimately make. Appendix Table A1 provides a relationship between some of the national and international specifications and these GMW3344 alloy grades. Table 1: Ingot Grades and Commercial Alloys Ingot
5、 Grades Commercial Alloy AI4Mg Zamak 3 AI4Cu1Mg Zamak 5 AI4Cu3Mg Zamak 2 AI8Cu1Mg ZA 8 AI11Cu1Mg ZA 12 AI27Cu2Mg ZA 27 Cu6A13Mg ACuZinc 5 Cu10AI4Mg ACuZinc 10 1.2 Symbols. Not applicable. 1.3 Typical Applications. Zinc alloy ingots are used as the base melting stock to cast zinc alloy parts for auto
6、motive usage. Various compositions are needed to meet the strength requirements of the different high pressure die casting grades. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM B240 EN 1774 ASTM B892 ISO 3
7、01 2.2 GM Standards/Specifications. GMW3059 GMW3341 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without
8、 license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3344 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 2 of 5 3 Requirements 3.1 Requirements on Delivery. 3.1.1 Chemical Requirements. Ingots furnished to this specification shall conform to the chemical composit
9、ion limits shown in Table 2. Exceptions to GMW3344 composition requirements require agreement from purchaser (Design Responsible Engineer or delegate), and shall be explicitly documented on the GM engineering drawing and other equivalent part specification documents. Sampling of the zinc alloy ingot
10、s for compliance with the chemical requirements shall be in accordance with ASTM B240. Table 2: Chemical Composition Limits for GMW3344 Zinc Alloy Ingot Element Note 1 Al Cu Mg Fe Pb Cd Sn Al4Mg 3.9 to 4.3 0.10 max. 0.025 to 0.05 0.075 max. 0.004 max. 0.003 max. 0.002 max. Al4Cu1Mg 3.9 to 4.3 0.75 t
11、o 1.25 0.03 to 0.06 0.075 max. 0.004 max. 0.003 max. 0.002 max. Al4Cu3Mg 3.9 to 4.3 2.5 to 3.3 0.025 to 0.05 0.075 max. 0.004 max. 0.003 max. 0.002 max. Al18Cu1Mg 8.2 to 8.8 0.8 to 1.3 0.02 to 0.03 0.065 max. 0.005 max. 0.005 max. 0.002 max. Al11Cu1Mg 10.8 to 11.5 0.5 to 1.2 0.02 to 0.03 0.065 max.
12、0.005 max. 0.005 max. 0.002 max. Al27Cu2Mg 25.5 to 28.0 2.0 to 2.5 0.012 to 0.02 0.072 max. 0.005 max. 0.005 max. 0.002 max. Cu6Al3Mg 2.8 to 3.3 5.2 to 6.0 0.035 to 0.05 0.05 max. 0.004 max. 0.003 max. 0.002 max. Cu10Al4Mg 3.2 to 4.0 10.2 to 11.0 0.035 to 0.05 0.05 max. 0.004 max. 0.003 max. 0.002 m
13、ax. Note 1: Composition limits in percent (%) by weight. Remainder of each alloy is Zn. 3.1.2 Identification Requirements. Each ingot shall be marked with a grade designation by a cast, stamped or color identification. In addition, each bundle or pallet of ingots shall be identified with the manufac
14、turers name, the respective heat or lot identification and the total weight of each bundle or pallet. 3.1.3 Color Coding. The color coding for zinc ingots shall consist of a two color system with the exception of Cu10Al4Mg which use a three color code. The color coding for each ingot grade is listed
15、 in Table 3. Table 3: Color Coding by Ingot Grade Ingot Grade Color Code AI4Mg White/yellow AI4Cu1Mg White/black AI4Cu3Mg White/green AI8Cu1Mg White/blue AI11Cu1Mg White/orange AI27Cu2Mg White/violet Cu6A13Mg White/red Cu10AI4Mg White/red/green 3.1.4 Shape of Ingots. The shape of the ingots shall be
16、 at the discretion of the supplier, unless a specific shape is agreed upon between the purchaser and the supplier. 3.1.5 Condition of Ingot. The material covered by this specification shall be free of dross, adhering foreign matter and surface oxides. Copyright General Motors Company Provided by IHS
17、 under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3344 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 3 of 5 3.2 Processing Requirements. To provide high qua
18、lity ingots, thorough mixing of the molten bath in the furnace pot is recommended to insure homogeneity. Crucibles and furnaces that have been previously used for brass and bronze must be avoided, as lead and tin (which are commonly used in copper-based alloys) are serious contaminates. It is also r
19、ecommended that melting and handling equipment be coated with refractory washes to prevent iron dissolution and subsequent melt contamination. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and rec
20、ommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for confo
21、rmity with the requirements of this material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwi
22、se agreed, all testing and documentation normally required for initial release must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for
23、 a new release. If not otherwise agreed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Ini
24、tial Source Approval. No shipments shall be made by any supplier until representative initial production samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 5.5 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS).
25、 For new product submissions, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requir
26、ements or other country-specific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials supplied to this standard must comply
27、 with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File GM Supply Power under this standard number have been qualified by Engine
28、ering as meeting the requirements of this standard. Note: Not applicable to this standard. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Chemicals MSDS Material Safety Data Sheets SDS Safety Data Sheet
29、s Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3344 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 4 of
30、5 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: GMW3344M-ZN-I-Al4Cu1Mg Alloy code (Table 2) Subcategory (Ingot) Category (Zinc) Material type (Metal) Continuous number GM Worldwide Figure 1: Ingot Alloy Callout Example with All Required Codes 9 Rel
31、ease and Revisions This standard was originated in April 2000. It was first approved in October 2000. It was first published in October 2000. Issue Publication Date Description (Organization) 1 OCT 2000 Initial publication. 2 FEB 2012 Update engineering content. (Non-ferrous Metals and Castings GSSL
32、T) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3344 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 5 of
33、 5 Appendix A Table A1: GMW3344 Alloy Listing Comparable Alloys Alloy USA Europe International GMW3344 ASTM B240 EN 1774 ISO 301 AI4Mg AG40A ZnAI4 ZnAI4 AI4Cu1Mg AC41A ZnAI4Cu1 ZnAI4Cu1 AI4Cu3Mg AC43A ZnAI4Cu3 ZnAI4Cu3 AI8Cu1Mg ZA-8 ZnAI8Cu1 AI11Cu1Mg ZA-12 ZnAI11Cu1 ZnAI11Cu1 AI27Cu2Mg ZA-27 ZnAI12
34、Cu2 Cu6AI3Mg ACuZinc 5 Note 1 Cu10AI4Mg ACuZinc 10 Note 2 Note 1: This grade is covered under ASTM B892 Note 2: This grade is not covered under any ASTM standard Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
