1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16884 Polyamide 6 - 35% Glass Fiber Reinforced, Heat Stabilized, Impact Modified, Oil Resistant Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 1 of 4 1 Scope 1.1 Material Description. This standard covers the pro
2、perties of a 35% by mass glass fiber reinforced, heat stabilized, impact modified, oil resistant polyamide 6 (nylon 6) which is used in injected form for molded components. 1.2 Symbols. The material abbreviation according to ISO 11469 is PA6-GF35-I. 1.3 Typical Applications. Typical applications inc
3、lude the following: Oil Pans. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D6869 ISO 188 ISO 527-1/2 ISO 11359-2 ASTM E831 ISO 294 ISO 1183 ISO 11469 ISO 75 ISO 294-3/4 ISO 1874-2 ISO 15512 ISO 179/1eA IS
4、O 527 ISO 3451 2.2 GM Standards/Specifications. GMW3013 GMW3059 GMW3221 GMW14335 2.3 Additional References. ASTM Service Fluid 105 (SF105) TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.2 Requirements on D
5、elivery. Important physical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 29
6、4 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 with moisture content of 0.2% maximum (ASTM D6869, ISO 15512 Method A or B, or GMW14335). Immediately after molding, specimens shall be sealed in
7、 moisture-proof containers and stored at 22 C 3 C for at least 24 h prior to test as specified in ISO 1874-2. All tests shall be performed on unannealed specimens immediately after their removal from the containers in a controlled atmosphere per GMW3221, Code A unless otherwise specified. In additio
8、n, 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. The minimum values specified in the property tables must be met by test specimens in natural, black, or in a standard s
9、ampled color if natural or black are not available. 3.2.1 Compound Properties (Natural, Black and Integrally Colored). See Table 1. The following are also required for full standard approval. The minimum number of lots per test required is one in natural: Poissons Ratio, Coefficient of Linear Therma
10、l Expansion (CLTE), Mold Shrinkage, Stress Strain Curve at multiple 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 GMW16884 Copyright 2013
11、General Motors Company All Rights Reserved January 2013 Page 2 of 4 temperatures (for example -30 C, 23 C, 140 C), Shear Modulus Curve; Differential Scanning Calorimetry (DSC) Curve; and Infrared Spectroscopy Curve. See GMW3013 for the test procedures. 3.3 Performance Requirements. Performance requi
12、rements shall be specified on part drawings or in component specifications. 3.4 Property Retention after Oil Soak. Prepare 20 samples for tensile strength per ISO 527 and 20 samples for notched Charpy impact per ISO 179/1eA. A temperature controlled pot (typically stainless steel, approximately 30.5
13、 cm x 30.5 cm, 23 L) is filled with ASTM Service Fluid 105 (SF105) to fill line and temperature is set to 150 C. Completely immerse 15 samples of each type in the ASTM SF105 at 150 C. Remove five specimens of each type after each duration, 1000 h, 3000 h, and 5000 h. Allow specimens to cool to room
14、temperature. When cool, the specimens shall be wiped clean with a clean, dry cloth. Place the specimens in moisture-proof bags or desiccators for conditioning per 3.2. Test the control specimens and each set of oil aged specimens immediately after the conditioning period. Record results and report p
15、ercent retention as required in Table 1. Table 1: Compound Properties (Natural and Black) Property Standard Units Value Ash ISO 3451 % 33 to 37 Density ISO 1183 g/cm3 Target Range 1.35 to 1.41 Moisture Content ISO 15512 Method A or B or GMW14335 % 0.2 Tensile Modulus ISO 527-1/2 MPa 8500 to 11 500 T
16、ensile Stress at Break ISO 527-1/2 MPa 150 Tensile Stress at Break after Heat Aging Note 1 ISO 188 ISO 527 % Retention 90 Tensile Stress at Break after Exposure to Oil After 1000 h After 3000 h After 5000 h Test per 3.4 SF105 at 150 C ISO 527 % Retention 100 100 100 Tensile Strain at Break ISO 527-1
17、/2 % 3.0 Tensile Strain at Break after Exposure to Oil After 1000 h After 3000 h After 5000 h Test per 3.4 SF105 at 150 C ISO 527 % Retention 85 80 75 Notched Charpy Impact Strength At +23 C At -30 C ISO 179/1eA kJ/m2 17 12 Notched Charpy Impact after Exposure to Oil After 1000 h After 3000 h After
18、5000 h Test per 3.4 SF105 at 150 C ISO 179/1eA % Retention 80 70 60 Notched Charpy Impact after Heat Aging Note 2 ISO 188 ISO 179/1eA % Retention 75 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without
19、 license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16884 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 3 of 4 Property Standard Units Value Heat Deflection Temperature under Load 1.8 MPa ISO 75 C 195 Coefficient of Linear Thermal Expansion (CLTE) Parallel to Fl
20、ow Perpendicular to Flow ASTM E831 or ISO 11359-2, Thermomechanical Analysis (TMA), Mean secant value over the temperature range -30 C to +160 C 10-6 mm/mm/C 15 120 Mold Shrinkage (for reference only) after 48 h at 23 C Parallel to Flow Perpendicular to Flow ISO 294-3/4 % 0.2 to 0.4 0.5 to 0.7 Note
21、1: Specimens tested for Tensile Stress at Break to ISO 527 after heat aging 1000 h 5 h at +150 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. Note 2: Specimens tested for Notched Charpy Impact per ISO 179
22、/1eA after heat aging 1000 h 5 h at +150 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. 4 Manufacturing Process Not applicable. 5 Rules and Regulati
23、ons 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. Sam
24、ples 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 a
25、ny 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,
26、 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 short
27、er 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 D
28、ata 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 Genera
29、l 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
30、be approved by General Motors. 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 GMW16884 Copyright 2013 General Motors Company All Rights Res
31、erved January 2013 Page 4 of 4 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 Appro
32、val Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact GM Materials Engineering for detail 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
33、. MATSPC: Global repository of GM approved materials for corresponding GM Engineering 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 MSD
34、S Material Safety Data Sheet PPAP Production Part Approval Process SDS Safety Data Sheet TMA Thermomechanical Analysis 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16884P-PA6-GF35 9 Release and Revisions This standard was originate
35、d in November 2012. It was first approved by the Plastics Global Subsystem Leadership Team in January 2013. It was first published in January 2013. Issue Publication Date Description (Organization) 1 JAN 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-,-,-
