1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16751 Grease, Fluorinated Copyright 2012 General Motors Company All Rights Reserved August 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope 1.1 Material Description. This specification defines grease comp
2、osed of perfluoropolyether oil and polytetrafluoroethylene or polyurea thickener. 1.2 Symbols. Not applicable. 1.3 Typical Applications. Grease defined by this specification is intended for applications requiring resistance to water, fuel, oil, and aggressive chemicals. Fluorinated grease with polyt
3、etrafluoroethylene (PTFE) thickener is often used in vehicle interiors, pin calipers, and clutch forks (spheric pin articulation). Fluorinated grease with polyurea or PTFE thickener is used to provide insertion force reduction and long term protection of electrical contacts. 1.4 Remarks. Fluorinated
4、 grease with PTFE thickener is compatible with most elastomers and plastics. Fluorinated grease with polyurea thickener should not be used to eliminate vehicle interior noise. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Spec
5、ifications. ASTM D217 ASTM D2596 DIN 51350 DIN ISO 2137 ASTM D566 ASTM D6138 DIN 51802 DIN ISO 2176 ASTM D2265 ASTM D6184 DIN 51805 2.2 GM Standards/Specifications. GMW3059 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Performance
6、 Requirements. 3.1.1 Base Oil. Perfluoropolyether (PFPE) oil shall be used as the base oil. 3.1.2 Thickener. Fluorinated grease shall contain either PTFE particles or polyurea as the thickening agent. 3.1.2.1 Polyurea thickeners are produced from the reaction of isocyanates and amines and are someti
7、mes referred to as diurea or tetraurea, depending on the size of the urea structure. 3.1.2.2 Thickener Designations. The designation for fluorinated grease containing PTFE thickener is PT. The designation for fluorinated grease containing polyurea thickener is UT. 3.1.3 Specific Requirements. The gr
8、ease shall meet the requirements listed in Appendix A, Table A1 and Table A2. 3.2 Nomenclature. Grease type, thickener type, and consistency are defined using the following nomenclature: 4XY# where: 4 means PFPE oil-based grease XY are letters designating thickener type shown in 3.1.2.1 # is a numbe
9、r from one to three (1 to 3) indicating National Lubricating Grease Institute (NLGI) consistency. (Example: 4PT2 is PFPE oil-based grease, PTFE thickener, NLGI consistency 2). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or n
10、etworking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16751 Copyright 2012 General Motor Company All Rights Reserved August 2012 Page 2 of 4 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable l
11、aws, 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. All shipments of material or parts under contract or purchase order m
12、anufactured to this specification shall be equivalent in every respect to the initial samples approved by Engineering. There shall be no changes in either formulation or manufacturing processes permitted without prior notification and approval by Engineering. Lack of notification by the supplier con
13、stitutes grounds for rejection of any shipment. While samples may be taken from incoming shipments and checked for conformance to this specification, the supplier shall accept the responsibility for incoming shipments meeting this specification without dependence upon purchasers inspection. The seri
14、es of tests used to approve each batch of product along with acceptance limits will be agreed upon by the purchaser and seller. The laboratory providing the certificate of analysis must also participate in a proficiency testing program (round robin) that is approved by the Fuels, Fluids, and Lubrica
15、nts Global Subsystem Leadership Team (GSSLT) or designate. The Fuels, Fluids, and Lubricants GSSLT or designate must receive copies of the proficiency testing reports directly from the test program administrator. 5.4 Initial Source Approval. No shipment shall be made by any supplier until representa
16、tive initial production samples have been approved by the Fuels, Fluids, and Lubricants Global Subsystem Leadership Team or designees meeting the requirements of this specification. 5.5 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in chemic
17、al 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 requirements.
18、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 standard must comply with the requirements of GMW3059, Restricted and Report
19、able Substances for Parts. 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 qualified by Engineering as meeting the requirements of this standard. For other G
20、M 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 Engineering Standards. PT: Designation for fluorinated grease containing PTFE thi
21、ckener. UT: Designation for fluorinated grease containing polyurea thickener. 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Chemicals GSSLT Global Subsystem Leadership Team MSDS Material Safety Data Sheet Copyright General Motors Company P
22、rovided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16751 Copyright 2012 General Motor Company All Rights Reserved August 2012 Page 3 of 4 NLGI National Lubricating Grease Ins
23、titute PFPE Polyfluoropolyether PTFE Polytetrafluoroethylene SDS Safety Data Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16751 9 Release and Revisions This standard was originated in January 2012. It was first approved by th
24、e Fuels, Fluids, and Lubricants Global Subsystem Leadership Team (GSSLT) in February 2012. It was first published in February 2012. Issue Publication Date Description (Organization) 1 FEB 2012 Initial publication. 2 AUG 2012 Added Regional Cross Reference Table. (Fuels, Fluids, and Lubricants Global
25、 Subsystem Leadership Team) Cross Reference of Regional Specifications Specification Region GMW Category Equivalent Specification Comments 9985880 GMNA 4PT2 Service range -35 C to 225 C 9986173 GMNA 4PT2 Service range -50 C to 225 C 24578831 GMB 4PT2 Service range -30 C to 260 C Extreme pressure 800
26、0 N 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 GMW16751 Copyright 2012 General Motor Company All Rights Reserved August 2012 Page 4 of
27、4 Appendix A A1 Consistency and Properties A1.1 Consistency for Performance Levels 4PT1, 4UT1, 4PT2, 4UT2, 4PT3, 4UT3. Table A1: Consistency for Performance Levels Property Test Method Units 4PT1, 4UT1 4PT2, 4UT2 4PT3, 4UT3 Consistency, Worked Penetration ASTM D217 DIN ISO 2137 mm/10 310 to 340 265
28、to 295 220 to 250 A2 Properties for Performance Levels Table A2: Properties for Performance Levels Note 1, Note 2 Property Test Method Units 4PT1, 4PT2, 4PT3 4UT1, 4UT2, 4UT3 Corrosion resistance ASTM D6138 DIN 51802 Rating, Maximum 1 Not applicable Dropping Point ASTM D566 ASTM D2265 DIN ISO 2176 C
29、 260 (non-melting) 120 Extreme Pressure, Weld Point ASTM D2596 DIN 51350 N (kgf), Minimum 7000 (714) Not applicable Low Temperature Performance DIN 51805 Pressure, mbar, Maximum 1400 at -40 C Not applicable Oil Separation ASTM D6184 % Maximum 5 5 Note 1: Corrosion resistance, extreme pressure weld p
30、oint, and low temperature performance are not required for grease used for interior applications. Note 2: Service temperature range for 4PT grease shall be -30 to 260 C. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
