1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16428 Polyamide 66 - 15% Glass Fiber Reinforced, Heat Stabilized, Flame Retardant for Underhood Applications Copyright 2012 General Motors Company All Rights Reserved May 2012 Originating Department: North American Engineering Standards Page
2、 1 of 5 1 Scope 1.1 Material Description. This standard covers the properties of a 15% by mass glass fiber reinforced, heat stabilized, flame retardant, polyamide 66 (nylon 66), which is used in injected form for molded components. This material can be colorable or paintable to meet underhood requir
3、ements. Types are defined in Table 4. 1.2 Symbols. The material abbreviation according to ISO 11469 is PA66-(GF15+Mxx) . 1.3 Typical Applications. Typical applications include engine covers. 1.4 Remarks. Not applicable. 2 References Note: Only the latest approved standards are applicable unless othe
4、rwise specified. 2.1 External Standards/Specifications. ASTM D3801 ISO 1183 ASTM D6869 ISO 1874-2 ISO 75 ISO 3451 ISO 179/1eA ISO 11469 ISO 188 ISO 15512 ISO 294 UL 94 ISO 527-1/2 2.2 GM Standards/Specifications. GMW3013 GMW14335 GMW3059 GMW16172 GMW3221 2.3 Additional References. TMC003 Material Sa
5、fety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.2 Requirements on Delivery. Important physical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawi
6、ngs, in material specifications and otherwise. Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 1874-2. All values indicated herein are based on material considered to be in the dry-as-molded state wi
7、th moisture content of 0.2% maximum (ASTM D6869, ISO 15512 Method A or B, or GMW14335). Immediately after molding, specimens shall be sealed in moisture-proof containers and stored at 22 C 3 C for at least 24 hours prior to test as specified in ISO 1874-2. All tests shall be performed on unannealed
8、specimens immediately after their removal from the containers in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. In addition, tests specified at temperatures below or above 22 C 3 C shall be conducted at the specified temperature using specimens conditioned at the specified
9、temperature for 4 hours minimum. 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 GMW16428 Copyright 2012 General Motors Company All Rights R
10、eserved May 2012 Page 2 of 5 The minimum values specified in the property tables must be met by test specimens in natural, black, or in a standard sampled color if natural or black are not available. 3.2.1 Compound Properties (Natural, Black and Integrally Colored). See Tables 1, 2 and 3. The follow
11、ing are also required for full standard approval. Poissons Ratio, Coefficient of Linear Thermal Expansion (CLTE). Mold Shrinkage, Stress Strain Curve at multiple temperatures (for example -30 C, 23 C, 85 C. Shear Modulus Curve; Differential Scanning Calorimetry (DSC) Curve. Infrared Spectroscopy Cur
12、ve. See GMW3013 for the test procedures. 3.3 Performance Requirements. Performance requirements shall be specified on part drawings or in component specifications. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules
13、, regulations and recommendations 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 shal
14、l be tested for conformity 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
15、, etc. If not otherwise 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 proce
16、sses and to apply for 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
17、the supplier. 5.4 Initial 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 Da
18、ta Sheets (MSDS/SDS). 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 C
19、hemicals (GHS) requirements 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
20、 standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 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 ENGINEERIN
21、G STANDARDS GMW16428 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 3 of 5 Table 1: Compound Properties (Natural and Black) Must be met by Types 1 and 2 Property Standard Units Value Ash Note 1 ISO 3451 % Target Range 13 to 35 Density Note 2 ISO 1183 g/cm3 Target Range 1.25
22、to 1.55 Moisture Content ISO 15512 Method A or B or GMW14335 % 0.2 Tensile Modulus ISO 527-1/2 MPa 5000 to 7000 Tensile Stress at Break ISO 527-1/2 MPa 90 Tensile Stress at Break after Heat Aging Note 3 ISO 188 ISO 527 % Retention 65 Tensile Strain at Break ISO 527-1/2 % 2.0 Notched Charpy Impact St
23、rength At +23 C At -30 C ISO 179/1eA kJ/m2 3.0 3.0 Notched Charpy Impact after Heat Aging Note 4 ISO 188 ISO 179/1eA % Retention 75 Heat Deflection Temperature under Load 1.8 Mpa ISO 75 C 170 Flammability Rating at 0.8 mm UL 94 ASTM D3801 Rating V0 Flammability Rating at 0.8 mm after Heat Aging A No
24、te 5 Heat Aging B Note 5 UL 94 ASTM D3801 Rating V0 V0 Note 1: Wide ash content range due to differences in flame retardant additives. Material is to be 15% glass fiber with the remainder of ash being flame retardant additive remnants. Note 2: Wide density range and wide ash range due to differences
25、 in flame retardant additives. Note 3: Specimens tested for Tensile Stress at Break to ISO 527 after heat aging 1000 5 h at +140 C 5 C according to ISO 188 Method A (air oven method) shall have a minimum of 65% retention relative to unaged specimens tested concurrently. Note 4: Specimens tested for
26、Notched Charpy Impact per ISO 179/1eA after heat aging 1000 5 h at +140 C 5 C according to ISO 188 Method A (air oven method) shall have a minimum of 75% retention relative to unaged specimens tested concurrently. Charpy impact specimens shall be notched prior to aging. Note 5: Specimens tested for
27、flammability to UL 94 after heat aging (A-1000 5 h at +140 C 5 C, B-3000 5 h at +140 5 C) according to ISO 188/A shall have a V0 rating. Table 2: Compound Properties (Integrally Colored) Must be Met by Type 1 Property Standard Units Value Heat Resistance 168 h at 120 C ISO 188 - No appearance change
28、, E 3.0 Notched Charpy Impact Strength At + 23 C ISO 179/1eA kJ/m2 3.0 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 GMW16428 Copyright 20
29、12 General Motors Company All Rights Reserved May 2012 Page 4 of 5 Property Standard Units Value At - 30 C 3.0 Flammability Rating at 0.8 mm UL 94 ASTM D3801 Rating V0 Flammability Rating at 0.8 mm after Heat Aging A Note 1 Heat Aging B Note 1 UL 94 ASTM D3801 Rating V0 V0 Note 1: Specimens tested f
30、or flammability to UL 94 after heat aging (A-1000 5 h at +140 C 5 C, B-3000 5 h at +140 C 5 C) according to ISO 188/A shall have a V0 rating. Table 3: Compound Properties (Paintable) Must be Met by Type 2 Property Standard Units Value Paintability GMW16172 - Table 1 for Underhood Plastics per GMW161
31、72 Table 4: Definition of Types Property Type Generic Black or Color Matched to Specific Color 1 Paintable 2 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File MATSPC under this standard number have been qu
32、alified by Engineering as meeting the requirements of this standard. For other GM locations, the responsible Engineering group should be contacted to obtain the approved source in that individual country. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM E
33、ngineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion DSC Differential Scanning Calorimetry GHS Globally Harmonized System of Classification and Labeling of Chemicals MSDS Material Safety Data Sheet SDS Safety Data Sheet UL Underwriters Laborato
34、ry V0 Vertical Flammability Rating 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16428-PA66-GF15-TX Where: TX = Type as defined in Table 4 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot
35、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16428 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 5 of 5 9 Release and Revisions This standard was originated in October 2010. It was first approved by th
36、e Global Plastics Team in November 2011. It was first published in November 2011. Issue Publication Date Description (Organization) 1 NOV 2011 Initial publication. 2 MAY 2012 Revised ash content. Corrected clerical errors. (Plastics Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
