1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15584 Styrene Maleic Anhydride Copolymer Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 1 of 4 1 Scope 1.1 Material Description. This standard describes materials types of Styrene Maleic Anhydride (S/MA) copolymer th
2、at are used in injection components. Code letters, in addition to GMW3013 guidelines that apply to this standard, are listed in 1.2. 1.1.1 Types. The classification into groups is according to the different properties as described in Table 1 and Table 2. 1.2 Symbols. The material abbreviation accord
3、ing to ISO 11469 is S/MAS/MA-GF12S/MA-GF16S/MA-GF20. 1.3 Typical Applications. Typical applications include interior substrates that require high level of dimensional stability - not “A“ surface colorable. 2 References Note: Only the latest approved standards are applicable unless otherwise specifie
4、d. 2.1 External Standards/Specifications. ASTM D955 ISO 294-3/4 ISO 1133 ISO 3167 ISO 75-1/2 ISO 306 ISO 1183-A ISO 3451-1 ISO 179/1eA ISO 527-1/2 ISO 2580-2 ISO 11469 ISO 294 2.2 GM Standards/Specifications. GMW3013 GMW3205 GMW3235 GMW16853 GMW3059 GMW3221 GMW15634 2.3 Additional References. TMC003
5、 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Material Requirements. Materials approved to this standard shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plastics. 3.2 Requirements on Delivery. Important
6、 physical, mechanical and thermal properties that characterize the material are summarized in Table 1. Note: For each product, the requirements to Table 1 shall be documented by Certification Statement according to GMW3013. The color shall be specified on drawings, in material specifications, and ot
7、herwise. 3.3 Requirements on Test Specimens. Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 2580-2. Test methods and specimen dimensions are also to be in accordance with ISO 2580-2 with the followi
8、ng additions: use ISO 3167, Type 1A, thickness 4 mm for tensile and flexural properties. 3.3.1 All tests shall be performed on specimen 40 h minimum after molding and immediately following a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specifie
9、d. All tests shall be performed on unannealed specimens. 3.3.2 The values specified in Table 1 shall be met by test specimens in natural or black. For integrally colored grades where other additive systems (e.g., stabilizer) are used, the impact values shall not decrease more than 10% from the speci
10、fied minimum value. 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 GMW15584 Copyright 2013 General Motors Company All Rights Reserved May 2
11、013 Page 2 of 4 3.3.3 Chemical Requirements. All parts manufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.4 Compound Properties. See Table 1. The following are also required for full specification approval. The minimum number of lots per test re
12、quired is one in natural: Tensile Modulus, Poisson Ratio, and Stress Strain Curve at +23 C, +85 C, -30 C. Test Report according to GMW16853. 3.5 Performance Requirements. Performance requirements, e.g., flammability, fogging or resistance to odor, shall be specified on part drawings or in component
13、specifications. Table 1: Compound Properties (Natural and Black) Property Standard Note 1 Units T1 T2 T3 T4 Tensile Modulus ISO 527-1/2 MPa 1900 to 2500 3300 to 4300 4700 to 5700 4900 to 5900 Tensile Yield/Break ISO 527-1/2 MPa 25 to 35 45 to 65 65 to 85 65 to 85 Charpy Notched Impact Strength +23 C
14、 ISO 179/1eA kJ/m2 6 6 6 6 Charpy Notched Impact Strength -30 C ISO 179/1eA kJ/m2 No specification requirement Density ISO 1183-A g/cm3 1.04 to 1.10 1.12 to 1.18 1.15 to 1.21 1.17 to 1.23 Ash ISO 3451-1 at +950 C % by mass Not applicable 10 to 14 14 to 18 18 to 20 Mold Flow Rate ISO 1133 cm3/10 mini
15、mum No specification requirement Mold Shrink - Flow Direction (information only) ISO 294-3/4 or ASTM D955 % 0.50 0.40 0.35 0.30 Mold Shrink - Cross Flow Direction (information only) ISO 294-3/4 or ASTM D955 % 0.50 0.40 0.35 0.30 Heat Deflection Temperature (HDT) - 0.45 MPa ISO 75-1/2 C No specificat
16、ion requirement HDT - 1.8 MPa ISO 75-1/2 C 95 to 105 115 to 125 115 to 125 118 to 128 Vicat ISO 306 C No specification requirement Emission Testing of Interior Materials (Odor, Fogging, Emissions): GMW16853 Odor GMW3205-B3 Rating 6 Fogging GMW3235-B-Y1-T2 mg Requirements see GMW16853 Emissions GMW15
17、634 Volatile Organic Compound (VOC) value Semi-volatile Organic Compound (SVOC) value g/g g/g Requirements see GMW16853 Requirements see GMW16853 Note 1: Standard test specimen and test setup should follow GMW3013. Copyright General Motors Company Provided by IHS under license with General Motors Co
18、mpanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15584 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 3 of 4 Table 2: Properties Assigned to Type Property Type No Filler Grade T1 12% Glass Filled T2
19、 16% Glass Filled T3 20% Glass Filled T4 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English
20、 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 conformity with the requirements of this material specification and approved by the responsible Engineering
21、 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 otherwise agreed, all testing and documentation normally required for initial release must be completed. It i
22、s 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 a new release. If not otherwise agreed, all release tests shall be repeated and documented by the sup
23、plier 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 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change
24、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) requirements or other country-specific MSDS/SDS requi
25、rements. 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. 5.5 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted a
26、nd Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of materials. If approved material a
27、lready listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact Material Engineering for details on the approval process. The material approval process must
28、be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleN
29、o reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15584 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 4 of 4 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Ch
30、emicals HDT Heat Deflection Temperature MSDS Material Safety Data Sheet PPAP Production Part Approval Process S/MA Styrene Maleic Anhydride SDS Safety Data Sheet SVOC Semi-volatile Organic Compound VOC Volatile Organic Compound 8 Coding System This standard shall be referenced in other documents, dr
31、awings, etc., as follows: Material per GMW15584P-S/MA-T1Z Where: GMW = Validation Area (GM Worldwide) GMW15584 = Material Type (base material specification) P = Material Type Plastics T1 = Type defined in Table 1 Z = Additional Code(s) defined per GMW3013 9 Release and Revisions This standard was or
32、iginated in April 2007. It was first approved by the Global Plastics Team in October 2008. It was first published in December 2008. Issue Publication Date Description (Organization) 1 DEC 2008 Initial publication. 2 MAY 2013 Five year refresh of standard. Removed Type 5 and added emissions requireme
33、nts. (Plastics Global Subsystem Leadership Team) Cross Reference of Replaced Material Coding GMW15584 Material Code Formerly Identified As T1 GMP.S/MA.005 (GMNA) GMP.S/MA.015 (GMNA) T2 GMP.S/MA.012 (GMNA) T3 GMP.S/MA.014 (GMNA) T4 GMP.S/MA.009 (GMNA) GMP.S/MA.011 (GMNA) GMP.S/MA.013 (GMNA) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
