1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW3035 Magnesium Alloy Ingots for High Pressure Die Casting Copyright 2012 General Motors Company All Rights Reserved March 2012 Originating Department: North American Engineering Standards Page 1 of 8 1 Scope This material specification cover
2、s the basic requirements for magnesium alloy ingots and is to be used for initial source validation of the ingot manufacturing process. It is implicit in this specification that the magnesium alloy ingots shall be of acceptable quality such that they can be cast into parts that will meet all relevan
3、t GM mechanical, chemical, and performance requirements. Magnesium alloy ingots are specified by chemical composition. Reference GMW16744 defines the process and requirements a magnesium producer must satisfy to qualify their ingot production process. 1.1 Material Description. The systems of magnesi
4、um alloys commonly used for automotive high pressure die casting are: magnesium-aluminum-zinc (AZ), magnesium-aluminum-manganese (AM), and magnesium-aluminum-silicon (AS). The various grades of pressure die cast magnesium alloys can be referenced in GM Worldwide specification GMW3028. 1.1.1 Material
5、 Identification. Material shall be identified either by ASTM International or International Organization for Standardization (ISO) designations. A list of commonly used alloys in ASTM (USA) and ISO designations are shown in Table C1, Appendix C. 1.2 Symbols. Not applicable. 1.3 Typical Applications.
6、 Magnesium alloy ingots are used to as base melting stock to cast magnesium alloy parts for automotive usage. Various compositions are needed to meet performance requirements of the different high pressure die cast grades. 2 References Note: Only the latest approved standards are applicable unless o
7、therwise specified. 2.1 External Standards/Specifications. ASTM B93/B93M ASTM E385 ISO 16220 ASTM B117 ASTM G1 2.2 GM Standards/Specifications. GMW3028 GMW3286 GMW16744 GMW3059 GMW14729 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ).3 Requirements 3.1
8、 Requirements on Test Specimens. 3.1.1 Chemical Requirements. The ingot alloys shall meet the chemical composition requirements per ASTM B93/B93M and ISO 16220. Chemical composition limits are shown in Table 1. Copyright General Motors Company Provided by IHS under license with General Motors Compan
9、yNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3035 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 2 of 8 Table 1: Chemical Composition for GMW3035 Magnesium Alloy Ingots Note 1, Note 2 Material GMW
10、3035M-MG-I Material ASTM ISO Al Mn Zn Si Fe (Max.) Cu (Max.) Al9Zn1 AZ91D 8.5 to 9.5 0.17 to 0.40 0.45 to 0.9 0.08 max. 0.004 0.025 MgAl9Zn1 (A) 8.5 to 9.5 0.17 to 0.40 0.45. to 0.9 0.08 max. 0.004 0.025 Al5Mn AM50A 4.5 to 5.3 0.28 to 0.50 0.20 max. 0.08 max. 0.004 0.008 MgAl5Mn 4.5 to 5.3 0.28 to 0
11、50 0.30 max. 0.08 max. 0.004 0.008 Al6Mn AM60B 5.6 to 6.4 0.26 to 0.50 0.20 max. 0.08 max. 0.004 0.008 MgAl6Mn 5.6 to 6.4 0.26 to 0.50 0.30 max. 0.08 max. 0.004 0.008 Al4Si AS41B 3.7 to 4.8 0.35 to 0.6 0.10 max. 0.60 to 1.4 0.0035 0.015 MgAl4Si 3.7 to 4.8 0.2 to 0.6 0.20 max. 0.7 to 1.2 0.004 0.008
12、 Al4RE2 AE42 Note 3 3.6 to 4.4 0.18 to 0.50 0.20 max. 0.05 max. 0.004 0.008 MgAl4RE2 Note 4 3.4 to 4.6 0.18 to 0.50 0.20 max. 0.05 max. 0.004 0.008 Al4RE4 AE44 Note 3 3.6 to 4.4 0.18 to 0.50 0.20 max. 0.05 max. 0.004 0.008 MgAl4RE4 Note 5 3.6 to 4.4 0.18 to 0.50 0.20 max. 0.05 max. 0.004 0.008 Mater
13、ial GMW3035M-MG-I Material ASTM ISO Ni (Max.) Rare Earth (RE) Other Metallic Impurities (Max. each) Note 6 RE/Al (Ratio Min.) Note 7 Mg Al9Zn1 AZ91D 0.001 - 0.01 - Balance MgAl9Zn1 (A) 0.001 - 0.01 - Balance Al5Mn AM50A 0.001 - 0.01 - Balance MgAl5Mn 0.001 - 0.01 - Balance Al6Mn AM60B 0.001 - 0.01 -
14、 Balance MgAl6Mn 0.001 - 0.01 - Balance Al4Si AS41B 0.001 - 0.01 - Balance MgAl4Si 0.001 - 0.01 - Balance Al4RE2 AE42 Note 3 0.001 2.0 to 3.0 0.01 - Balance MgAl4RE2 Note 4 0.001 2.0 to 3.0 0.01 - Balance Al4RE4 AE44 Note 3 0.001 3.6 to 4.6 Note 6 0.01 0.9 Balance MgAl4RE4 Note 5 0.001 3.6 to 4.6 No
15、te 6 0.01 0.9 Balance Note 1: Composition limits in percent (%) by weight. Remainder is magnesium (Mg). Note 2: All alloys shall have a beryllium content of 5 to15 ppm per ASTM B93/B93M. Note 3: Hydro Magnesium composition (not listed by ASTM B93/B93M). Note 4: Opel composition (not listed by ISO 16
16、220). Note 5: Hydro Magnesium composition (not listed by ISO 16220). Note 6: Typical Composition: Ce: 45 to 60%, La: 20 to 30%, Nd: 10 to 20%, Pr: 4 to 10%. Note 7: Includes listed elements for which no specific limit is shown. Max. = maximum; Min. = minimum; Mg = magnesium Copyright General Motors
17、Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3035 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 3 of 8 3.1.2 Mechanical Requirement
18、s. Not applicable. 3.1.3 Physical Requirements. Not applicable. 3.1.4 Additional Requirements. 3.1.4.1 Cleanliness of Ingots. 3.1.4.1.1 Ingot regions to be sampled and evaluated are provided in Appendix A. The ingots shall be selected from the start, middle, and the end of a lot or run. The type of
19、ingot, sample location within the ingot, and number of lots or runs to be tested shall be approved by the supplier and purchaser (Nonferrous and Casting Materials Global Subsystem Leadership Team (GSSLT) designated representative). If the ingot size or geometry does not permit excising specimens for
20、 Fast Neutron Activation Analysis (FNAA), cleanliness and corrosion testing in the locations identified in Appendix A, an alternative sampling pattern has to be approved by the Nonferrous milligram per square centimeter per day mg milligram Mg Magnesium MSDS Material Safety Data Sheet ppm Parts Per
21、Million RE Rare Earth SDS Safety Data Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW3035 9 Release and Revisions This standard was originated in March 1998. It was first approved in December 1998. It was first published in May
22、 1999. Issue Publication Date Description (Organization) 1 MAY 1999 Initial publication. 2 MAR 2005 General Update, AE44 Alloy and Appendix B Added; Extensive revisions made to Appendices and format. (Materials Engineering-Chassis/HVAC) 3 MAR 2012 Updated template and references. (Other technical ch
23、anges.) (Non-ferrous Metals GSSLT) 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 GMW3035 Copyright 2012 General Motors Company All Rights
24、Reserved March 2012 Page 6 of 8 Appendix A A1 Example of a Sampling Method A1.1 FNAA: Samples. Typical FNAA Mg alloy sample size for Texas A effectiveness of cleaning and extent of base metal removal shall be assessed per ASTM G1. Weigh the samples, and determine each samples weight loss. Using this
25、 weight loss, the samples total surface area, and the test exposure duration, calculate and record each samples corrosion rate in milligram per square centimeter per day (mg/cm2/day). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduct
26、ion or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3035 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 8 of 8 Appendix C Table C1: GMW Preferred Alloy Listing GMW Preferred Alloys GMW3035M-MG-I USA ASTM B93/93M International ISO
27、16220 Al9Zn1 AZ91D ISO-MgAl9Zn1 (A) - - - Al5Mn AM50A ISO-MgAl5Mn Al6Mn AM60B ISO-MgAl6Mn - - - Al4Si AS41B ISO-MgAl4Si - - - Al4RE2 AE42 MgAl4RE2 Al4RE4 AE44 MgAl4RE4 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
