1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16948 Polyamide 6 - Heat Stabilized, Impact Modified, UV Stabilized Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 1 of 5 1 Scope 1.1 Material Description. This standard covers properties of various types of heat sta
2、bilized, impact modified, ultraviolet (UV) stabilized polyamide 6 (nylon 6) which are used in injected form for molded components. 1.2 Symbols. The material abbreviation according to ISO 11469 is PA6-I. 1.3 Typical Applications. Typical applications include the following: interior components. 1.4 Re
3、marks. The specification is classified by level of impact modifiers; additional types may be added as necessary: T1: High Impact modified. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3763 ISO 188 ISO 18
4、74-2 ISO 11359-2 ASTM D6869 ISO 294 ISO 3146 ISO 11469 ASTM E831 ISO 294-3/4 ISO 3795 ISO 15512 ISO 75 ISO 527 ISO 6603-1/2 SAE J1545 ISO 179/1eA ISO 1183 ISO 11357-3 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW3417 GMW14334 GMW3059 GMW3232 GMW14162 GMW14335 GMW3205 GMW3235 2.3 Additional Re
5、ferences. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements Materials approved to this specification shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plastics. 3.1 Requirements on Delivery. Important physi
6、cal, mechanical and thermal properties that characterize the material are summarized in Table 1 and Table 2. The color shall be specified on drawings, in material specifications and otherwise. 3.2 Requirements on Test Specimens. Unless otherwise specified, injection molding of test specimens shall b
7、e accomplished per ISO 294 with the conditions for injection molding from ISO 1874-2. Test methods and specimen dimensions are also to be in accordance with ISO 1874-2. All values indicated herein are based on material considered to be in the dry-as-molded state with moisture content of 0.2% maximum
8、 (ASTM D6869, ISO 15512, Method A or B, or GMW14335). Immediately after molding, per ISO 1874-2, specimens shall be sealed in moisture-proof containers and stored at 22 C 3 C for at least 24 h. All tests shall be performed on unannealed specimens immediately after their removal from the containers i
9、n 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 temperature for 4 h minimum. Copyright General Motors Company P
10、rovided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16948 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 2 of 5 The values specified in Table 1 shall
11、be met by test specimens in natural, black or in a standard sampled color if natural or black are not available. The values specified in Table 2 shall be met by four typical interior colors for approval to the specification and by test specimens in specific colors as required during color developmen
12、t. 3.3 Compound Properties. See Tables 1 and 2. The following are also required for full standard approval. The minimum number of lots per test required for the following properties is one in natural: Poissons Ratio, Coefficient of Linear Thermal Expansion (CLTE), Mold Shrinkage, Stress Strain Curve
13、 at multiple temperatures (for example -30 C, 23 C, 100 C). See GMW3013 for all test procedures and parameters. 3.4 Performance Requirements. Performance requirements shall be specified on part drawings or in component specifications. All parts manufactured from molding compounds shall be resistant
14、to the media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. Table 1: Compound Properties (Natural and Black) High Impact Grade, T1 Property Note 1 Standard Units Value Density ISO 1183 g/cm3 Target Range 1.05 to 1.09
15、Moisture Content GMW14335 or ISO 15512, Method A or B % 0.2 Tensile Modulus ISO 527 MPa 1200 to 2450 Stress at Yield ISO 527 MPa 39 to 55 Stress at Yield after Heat Aging ISO 188 ISO 527 1000 h at 110 C % Retention 75 Notched Charpy Impact Strength ISO 179/1eA kJ/m2 at +23 C 45 at -30 C 7 Notched Ch
16、arpy Impact Strength after Heat Aging ISO 188 ISO 179/1eA 1000 h at 90 C % Retention 75 Multiaxial Impact Interior ASTM D3763 6.6 m/s J at Maximum Load at +23 C 30/30 Ductile at RT 22 at Low Temperature 30/30 Ductile at LT 25 (0 C) Multiaxial Impact Interior or Exterior ISO 6603-1/2 4.4 m/s J at Max
17、imum Load at +23 C 30/30 Ductile at RT Report at Low Temperature 24/30 Ductile at LT Report Melting Temperature ISO 3146 or ISO 11357-3 C Target Range 215 to 225 Heat Deflection Temperature under Load 1.8 MPa ISO 75 C 50 Fogging Gravimetric GMW3235-B-Y2-T2 mg 2 Copyright General Motors Company Provi
18、ded by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16948 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 3 of 5 High Impact Grade, T1 Property Note 1 Stan
19、dard Units Value Odor GMW3205 Dry Condition - Rating 6 Flammability GMW3232 or ISO 3795 All reporting must be in accordance with GMW3232 mm/minute SE or 100 Coefficient of Linear Thermal Expansion (CLTE) Parallel to Flow Perpendicular to Flow ASTM E831 or ISO 11359-2, Thermo Mechanical Analysis (TMA
20、), Mean secant value over the temperature range -30 C to +160 C 10-6 mm/mm/C 150 160 Mold Shrinkage (for reference only) after 48 h at 23 C Parallel to Flow Perpendicular to Flow ISO 294-3/4 % 1.4 to 1.6 1.4 to 1.6 Note 1: These values shall be determined in dry-as-molded condition. The mechanical p
21、roperties of types conditioned to equilibrium at room temperature and 50% relative humidity have significantly altered values. LT = Low Temperature RT = Room Temperature Table 2: Compound Properties (Integrally Colored) High Impact Grade, T1 Property Note 1 Standard Units Value Colorfastness to Ligh
22、t Color Change GMW14162, Cycle D, 601.6 kJ/m2 or GMW14162, Cycle B 100 C, 44 MJ/m2 SAE J1545 Note 2 - No objectionable defects allowed. E 3.0, Visual evaluation overrides numerical scale approval. Natural Weathering Color Change GMW3417, L1-F2-G1 55 k Langleys, 95 C SAE J1545 Note 2 - No objectionab
23、le defects allowed. E 3.0, Visual evaluation overrides numerical scale approval. Notched Charpy Impact Strength at +23 C ISO 179/1eA kJ/m2 45 Resistance to Cleaning Agents GMW14334 - A - Rating 1 Note 1: These values shall be determined in dry-as-molded condition. The mechanical properties of types
24、conditioned to equilibrium at room temperature and 50% relative humidity have significantly altered values. Note 2: CIELAB color space, 10 degree observer, illuminant D65, specular component included, sphere geometry, before and after exposure. 4 Manufacturing Process Not applicable. Copyright Gener
25、al 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 GMW16948 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 4 of 5 5 Rules and Regulat
26、ions 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 and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Sa
27、mples 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 department prior to commencement of delivery of bulk supplies. A new approval must be received for
28、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 is the responsibility of the supplier to inform the customer in a timely manner, without solicitation
29、, 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 supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shor
30、ter 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 in chemical composition of an existing product has occurred, a complete copy of the Material Safety
31、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 requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country Gener
32、al 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 and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must
33、 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 already listed is used, the part supplier can use GM Material File reference for Production Part Appr
34、oval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact the Plastics GSSLT for details on the approval process. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MA
35、TSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion GHS Globally Harmonized System of Classification and Labeling of Chemicals LT Low Temperature MSDS Material Safety Data
36、Sheet PPAP Production Part Approval Process RT Room Temperature SDS Safety Data Sheet TMA Thermo Mechanical Analysis UV Ultraviolet Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS
37、-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16948 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 5 of 5 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Heat Stabilized, Impact Modified, UV stabilized Polyamide 6 per GMW16948P-
38、PA6-TZ Where: GMW16948 = Document Identification P = Material Type, P=Plastic PA66 = Material Category TZ = Impact Level defined in Section 1.4 For example, GMWXXXXXP-PA6-T1 specifies a high impact modified, heat stabilized, UV stabilized polyamide 6. 9 Release and Revisions This standard was origin
39、ated in April 2013. It was first approved by the Plastics Global Subsystem Leadership Team in May 2013. It was first published in May 2013. Issue Publication Date Description (Organization) 1 MAY 2013 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
