1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16163 FKM/FPM for Crankcase Ventilation Applications Copyright 2012 General Motors All Rights Reserved March 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope This specification covers fluoroelastomers use
2、d in static sealing of Crankcase Ventilation Systems for gas (flex fuel) and diesel engines using B20. 1.1 Material Description. Materials are divided into the following types: 1.1.1 Type A: Fluoroelastomer (FKM/FPM) gasket or o-ring for use as sealings for +150 C permanent and +175 C peak temperatu
3、res. 1.1.2 Type B: All Type 1 or 2 fluorocarbon (FKM/FPM) gasket or o-ring compounds with a functional temperature range of -15 C to 175 C are defined by ASTM D1329 TR10 and SAE J2236 respectively. 1.1.3 Type C. All Type 3 fluorocarbon (FKM/FPM) compound(s) with a functional temperature range of -25
4、 C to 175 C are defined by ASTM D1329 TR10 and SAE J2236 respectively. Type only (no subscript grade) specification descriptions indicate the approved compound met all the requirements in Table 1 Material and Performance Properties. 1.1.4 Grade Description. Compound approvals that require special de
5、signations by engine fluid resistance are designated with a subscript letter. These compounds met the requirements differing only by the select fuel in which they were tested. This permits a gas or diesel only approval. 1.1.4.1 Ag, Bg, Cg. These symbols identify material types with resistance to gas
6、 only. See Table 1. 1.1.4.2 Ad, Bd, Cd. These symbols identify material types with resistance to diesel only. See Table 1. 1.2 Symbols. Identify the elastomer nomenclature using ASTM D1418 or ISO 1629. 1.3 Typical Applications. The ventilation system transfers combustion (blow-by) gases, water and f
7、uel vapor out of the engine crankcase. This standard covers the use of fluorocarbon elastomer whose function is to seal the vent system (plenum, air/oil separator, flow control devices - valves or orifices, quick-connect o-rings, fittings or caps). Hose and tubing is covered by other standards. 1.4
8、Remarks. 1.4.1 Fluorocarbons, when immersed in static (non-aerated) test fluids, often have higher property loss changes than in aerated fluids. These test conditions may not give direct correlation with service performance, but serve as comparative data for decision making. 1.4.2 Some prints/drawin
9、gs identify “D” or racetrack shapes as o-rings. To avoid confusion, testing and table data only apply to the ASTM D1414 definition of an o-ring. 1.4.3 Recent studies by DuPont Polymers recommend no metal oxide peroxide cure FKM/FPM compounds for maximum protection against biodiesel containing water.
10、 1.4.4 Elastomers used in crankcase vent system purchased assemblies are selected by supplier specific criteria and often remain unspecified or unidentified on end user prints and drawings. As the original equipment manufacturer (OEM) end user we reserve the right to define common rather than source
11、 specific requirements. Use this document in the appropriate Statement of Requirements and corporate prints and drawings as designated in Section 8 Coding. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D39
12、5 ISO 48 ASTM D412 ISO 188 ASTM D471 ISO 815 ASTM D1329 ISO 1629 ASTM D1414 ISO 1817 ASTM D1415 ISO 23529 ASTM D1418 SAE AS568 ASTM SF105 SAE J2236 ISO 37 2.2 GM Standards/Specifications. GME 8688 GMW3059 GME L0005 GMW14914 Copyright General Motors Company Provided by IHS under license with General
13、Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16163 Copyright 2012 General Motors All Rights Reserved March 2012 Page 2 of 5 2.3 Additional References. GMPT-5-020 TMC003 Material Safety Data Sheet guidance docum
14、ents (available at ). 3 Requirements 3.1 Resources. 3.1.1 Test Samples. Unless otherwise specified, the shape and size of test pieces shall be in accordance with the relevant test procedure. 3.1.1.1 Samples are finished parts or to be taken from finished parts. Where the dimensions on the finished p
15、arts do not allow preparing of test pieces, tests are to be performed on sheet material of same production batch. The same state of cure between slabs or buttons and finished parts must be assured by appropriate tests, which must be described in the test report. 3.1.1.2 If not otherwise stated, mech
16、anical properties in delivery state and after heat or fluid immersion are to be tested at +23 C 5 C and with the same test methods. Unless otherwise stated, ambient temperature test conditions shall be held to +23 C 5 C. Unless otherwise stated, all other temperatures except +23 C 5 C shall be held
17、to 3 C. 3.1.2 Conditioning. Conditioning shall be as specified in the relevant test procedure. 3.1.3 Equipment. Conforming to the relevant test procedure. 3.1.4 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.5 Alternatives.
18、 Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this specification shall be determined correctly with respect to its physical definition. 3.1.6 Facilities. Conforming to the relevant test procedures. 3.1.7 Deviations. Deviations from the
19、requirements of this standard shall have been agreed upon. Such deviations shall be specified on component drawings, test certificates, reports, etc. 3.2 Material and Performance Requirements. 3.2.1 Design or Product Validation Testing. Material and performance properties are summarized in Table 1.
20、For full approval of a sealing, compliance to the requirements of Table 1 is needed. Six samples of material of at least three production lots shall be tested to each of the requirements for Design or Product Validation Testing. 3.2.2 Audit/Inspection Testing. If not defined otherwise, the following
21、 testing should be done for production audit testing. Three samples of material shall be tested to each of the requirements for Audit/Inspection Testing. All tests per Table 1 except Resistance to Long Term Age Resistance, Fuel Resistances to Diesel and Gas, Crankcase Ventilation Gases. 3.2.3 Table
22、1 properties for Type B and Type C o-rings are based on cross section diameters of 1 to 3.5 mm found in SAE AS568. 3.2.4 These conditions are used to determine the tensile, modulus, and elongation of the Table 1 properties for Type B and C o-rings. 3.2.4.1 For o-rings in the 7 to 100 mm inner diamet
23、er (ID) range, select the test conditions for size and speed. 3.2.5 Test Spool Diameters. O-rings with 25.40 mm ID shall be pulled on 12.7 mm diameter spools. 3.2.6 Test Pull Rate. O-rings with 38.1 mm ID shall be pulled at 508.0 mm per minute. 3.2.7 Biodiesel (B20) Test Fluid. Approved dedicated so
24、urces for GMPT-5-020 are Gage Products Company and Haltermann Products. Shelf life is limited (around 90 days) as defined on the supplier Technical Data Sheet. Expired test solution will cause a significant property data shift. 3.2.8 Hardness. Table 1 has no properties specific to 60, 70 or 80 nomin
25、al or mid-range hardness. Hardness is a compound description or category feature and has no benefit for GMs needs. There is little difference between Table 1 values measured by different fluorocarbon hardness compounds of a given type. The Table 1 limits are amalgam of values found and all hardness
26、category compounds are expected to comply. 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 GMW16163 Copyright 2012 General Motors All Rights
27、 Reserved March 2012 Page 3 of 5 Table 1: Material and Performance Properties Property Test Procedure Unit Value Hardness All Type A ISO 48, Method M, measured on cross section IRHD See part drawing All Types B and C ASTM D1415, micro-hardness measured on part IRHDm See part drawing Elongation at Br
28、eak All Type A ISO 37, on whole ring, 500 20 mm/minute % 150 minimum All Types B and C ASTM D412 on slabs ASTM D1414 on whole ring % % 200 minimum 160 minimum Tensile Stress at 100% Elongation All Types B and C ASTM D412 on slabs, ASTM D1414 on whole ring MPa 1.9 minimum Tensile Strength All Type A
29、ISO 37, on whole ring, 500 20 mm/minute MPa 8 minimum All Types B and C ASTM D412 on slabs ASTM D1414 on whole ring MPa MPa 9.8 minimum 7.8 minimum Age Resistance (Heat Aging) All Type A ISO 188, Method B, 72 - 2 h at +175 C 3 C Change in Hardness Change in Elongation at Break Tensile Strength IRHD
30、% MPa 5 -20 maximum 9 minimum All Type A ISO 188, Method B, 168 - 2 h at +150 C 3 C Change in Hardness Change in Elongation at Break Tensile Strength IRHD % MPa 5 -30 maximum 7 minimum All Types B and C SAE J2236 at 175 C Change in Elongation at Break Change in Tensile Strength % % -50 maximum -50 m
31、aximum Compression Set Test pieces are sections from finished parts, tested at original thickness All Type A ISO 815, +150 C 3 C, 24 - 2 h, 25% compressed % 20 maximum All Types B and C ASTM D395, Method B, Type A specimen, option 2, 22 h at 175 C. Maintain load during cooling for 30 minutes to 2 h.
32、 Remove load and measure in 10 minutes. ASTM D1414 for o-ring. % % 40 maximum 50 maximum Fuel Resistance (Diesel) If of sufficient size, test pieces are sections from finished parts tested at original dimensions Type A, Ad ISO 1817, Diesel test fuel per GMW14914, GME, 336 - 2 h at 40 C Change in Ten
33、sile Strength Elongation at Break Volume Change % % % -40 maximum 100 minimum 0 to 30% Types B, Bd, C and Cd ASTM D471, GMPT-5-020 per GMW14914, 336 - 2 h at 60 C Change in Tensile Strength Elongation at Break Volume Change % % % -40 maximum 100 minimum 0 to 30% Copyright General Motors Company Prov
34、ided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16163 Copyright 2012 General Motors All Rights Reserved March 2012 Page 4 of 5 Property Test Procedure Unit Value Fuel Resista
35、nce (Gas) If of sufficient size, test pieces are sections from finished parts tested at original dimensions Types A, Ag, B, Bg, C and Cg ISO 1817-Gasoline test fuel per GMW14914, GME, 48 - 2 h at +23 C 5 C Change in Volume (15 minutes after removal) Elongation at Break (15 minutes after removal) Ten
36、sile Strength (15 minutes after removal) Bending Test r = 2.5 mm after storage in air for 48 h at +23 C Elongation at Break after Storage Tensile Strength after Storage % % MPa - % MPa 0 to +30 150 minimum 4 minimum no cracks 150 minimum 4 minimum Oil Resistance All Type A ISO 1817 in GME L0005, 168
37、 - 2 h, at +150 C 3 C Change in Hardness Change in Volume IRHD % 5 5 All Type B ASTM D471 or ISO 1817 in ASTM SF105, 168 - 2 h, at +150 C Change in Elongation at Break Change in Volume % % -80 maximum -5 to +15 All Type C ASTM D471 or ISO 1817 in ASTM SF105, 168 - 2 h, at +150 C Change in Elongation
38、 at Break Change in Volume % % -50 maximum -5 to +10 Cold Resistance All Type A ISO 23529, -30 C 3 C; 5 + 1 h Test on section from finished part Bending Test r = 2.5 mm - No cracks All Type B ASTM D1329 TR10 ASTM D1414 for o-rings C -15 or colder All Type C ASTM D1329 TR10 ASTM D1414 for o-rings C -
39、25 or colder Resistance to Crankcase Ventilation Gases Test pieces are sections from finished parts, tested at original dimensions All Type A After 4 Cycles to GME 8688 Change in Volume Change in Hardness Elongation at Break Tensile Strength % IRHD % MPa 0 to +30 -15 maximum 150 minimum 6 minimum 4
40、Manufacturing Process The surface of the elastomer shall be free of excess soap, talc or other material which could affect serviceability and usage. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country
41、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 shall be tested for conformity with the requirements of thi
42、s 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, etc. If not otherwise agreed, all testing and documen
43、tation 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 processes and to apply for a new release. If not otherwise a
44、greed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-
45、,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16163 Copyright 2012 General Motors All Rights Reserved March 2012 Page 5 of 5 supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Initial Source Approval. No shipments shall be
46、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 Data Sheets (MSDS/SDS). For new product submissions, or when a chan
47、ge 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 re
48、quirements. 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, Restricte
49、d and Reportable 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 GM locations, the responsible Engineering group should be contacted
