1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16800 Requirements for Liquid Anaerobic Compounds Used for Thread Locking, Retaining and Sealing Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 1 of 15 1 Scope No
2、te: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This document describes tests measuring properties of single component, self-curing liquid anaer
3、obic compounds used for locking, retaining, or sealing of machined flange surfaces, and threaded or cylindrical assemblies. Anaerobics used for sealing casting porosity are not covered by this standard. 1.2 Foreword. 1.2.1 This document identifies which tests (Appendix A, Table A1) are assigned to e
4、ach functional application (e.g., locking, sealing, retaining, etc.) 1.2.2 Test Selection. This document provides test selection content criteria for creating and revising anaerobic specifications. Use Appendix A, Table A1 to select the appropriate tests for the chosen anaerobic use. 1.2.2.1 In Appe
5、ndix A, Table A1, tests marked “M” are mandatory and must be part of the regional standard. 1.2.3 This document is referenced in specific regional standards (e.g., North America 998s) to maintain a focal point for test content, procedures, and eliminates the need to reproduce them in each document.
6、1.2.4 Media. Approving global anaerobic formulations presents test selection challenges for determining media compatibility (see 4.16). Since initial approvals may be by region, media testing may only represent regional and application-specific choices. Regional document authors should consider usin
7、g standard test media with controlled, single source formulations (e.g., ASTM D471, standard test liquids) that are moderately more aggressive to anaerobics than current production fluids. Further, consideration should be given to testing all potential media use as part of the initial approval. Auth
8、ors are encouraged to contact the Global Powertrain Integration and Sealant Specialist Team, release responsible engineer, manufacturing liaison engineer, and the anaerobic supplier to coordinate and identify all appropriate media. 1.3 Applicability. 1.3.1 Classification, Paragraphs 4.2 Through 4.18
9、. Relate to product selection, consistency and short-term compatibility in application use and storage. Also they permit comparison of production compounds. 1.3.2 Performance Tests, Paragraph 4.19. Evaluates the retaining and sealing required in locking, retaining or sealing of machined flange surfa
10、ces, threaded or cylindrical assemblies in contact with the adequate fluids. They permit comparison and measure the performance level of production compounds. 1.3.3 Finish Influence. General tests for breakaway and prevailing torque, static shear strength (pin and collar), and fluid compatibility us
11、e test parts with plain finishes to minimize their effect on anaerobic test results. These standard tests achieve repeatable and reproducible results to compare liquid anaerobic compounds. The tester and end user may test production released finishes to measure their influence on general or performa
12、nce test results in the specified documents. 1.3.3.1 Base Metal Influence. Tests for anaerobic strength and cure are affected by the surface chemistry of base metals. The tester and end user should test no finish or uncoated production released surfaces to measure their influence on general or perfo
13、rmance test results in the specified documents. 1.3.3.2 Applicable Anaerobic Compounds. Global materials referencing this document are listed in Table 5. Table 5 content consists of regionally designated older active standards where the category test protocol may not be clear (Appendix A, Table A1).
14、 New releases following publication will identify the proper test category referencing this document. 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
15、STANDARDS GMW16800 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 2 of 15 1.3.3.2.1 Managing Change. Until the older regional standard content is revised or refreshed, any changes in approved products or suppliers to that standard will follow the mandatory tests in the appr
16、opriate Appendix A, Table A1 category of this standard and not the test content of the unrevised regional standard. 1.3.4 Related Documents. This document does not cover pre-applied thread sealants. Those applications are covered in the following; 9985473, 9985490, GM6124M (limited use no replacemen
17、t), GM6175M/GM6194M (limited use no replacement), and GMW14657 managed by the GM Fasteners Committee. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASA Std. No. B4.1 ASTM D4562 ISO 188 ISO 10123 ASTM A109 ASTM
18、D4800 ISO 898/1 ISO 10964 ASTM B36 ASTM D5363 ISO 898/2 ISO 17025 ASTM B209 ASTM D5423 ISO 965 JIS B 0209 ASTM D445 ASTM D5649 ISO 3104 JIS B 1051 ASTM D471 ASTM D5657 ISO 3679 JIS B 1180 ASTM D573 ASTM D6396 ISO 3680 JIS B 1181 ASTM D1084 ASTM E100 ISO 4587 SAE J429 ASTM D1141 FF-N-836 ISO 4759/1 S
19、AE J1681 ASTM D3828 IEC 811 ISO 9000 2.2 GM Standards/Specifications. 9985148 9985345 9985473 GMW3155 9985226 9985352 9985490 GMW14657 9985253 9985361 9985536 GMW14729 9985261 9985399 9985552 GMW14735 9985266 9985408 9985729 GMW15357 9985283 9985409 9985768 GMW15359 9985299 9985427 GM123M GMW15735 9
20、985300 9985436 GM6277M GMW16676 9985306 9985460 2.3 Additional References. 2.3.1 Documentation. ASQC/AIAG PPAP Manual 2.3.2 Part Numbers. P/N 9253505 P/N 9273426 P/N 9274188 P/N 9274203 P/N 94545177 P/N 94545204 P/N 94545699 P/N 94575747 P/N 96227352 P/N HN1256 PN HN1823 P/N HN22250 Copyright Genera
21、l 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 GMW16800 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 3 of 15 P/N L000 0153 P/N
22、L000 0189 P/N L000 0416 P/N L000 0582 P/N L000 0800 2.3.3 Web Sites. ACT Laboratories web site www.q- Q Panel web site 3 Resources 3.1 Facilities. A suitable area or room for conducting testing with a stable and known environment. See 4.2.1. 3.1.1 Calibration. The test facilities and equipment shal
23、l be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables, as specified in this standard, shall be determined correctly with respect to their physical definition. 3.2 Equipment
24、. This section lists items not described in the referenced test standards. 3.2.1 Required Basic. All test labs must have this equipment unless otherwise specified. Minor variations between test labs are permitted provided it doesnt alter test results as verified in a common part test with a GM quali
25、fied lab(s). 3.2.1.1 Torque Measuring Device. Capable of measuring the specified test joint fastening specifications. A digital unit capable of torque/angle measurement, e.g., Sensor I from Ingersol Rand meets the requirements. 3.2.1.2 Oven. Capable of meeting ISO 188, IEC 811 or ASTM D5423, type 1
26、requirements. Unit chamber interior must be of sufficient size to hold test specimens or fixture(s). 3.2.1.3 Scraper (see Figure 1) made of stainless steel, or 1008/1010 steel with nickel chrome finish. 3.2.2 Optional Equipment. 3.2.2.1 Timer (stopwatch) measuring in tenths of seconds. 3.2.2.2 Reflu
27、x condensor (fluid compatibility). 3.2.2.3 Heater (fluid compatibility). 3.2.2.4 Thermostat (fluid compatibility). 3.3 Test Vehicle/Test Piece. 3.3.1 Torque Test Specimens (Nut and Bolt). Use the test specimens described in each specified test document. 3.3.2 All released GM North America 998 specif
28、ications before 2000, for breakaway and prevailing torque used un-oxidized finish hex head bolts 3/8 inch size, 16 threads per inch, Unified National Coarse (UNC) thread series, Class 2 fit (3/8-16 UNC, undamaged) Grade 5 in accordance with SAE J429. The minimum length is 1 inch (25.4 mm). The hex n
29、uts same thread and grade were Type II, Style 4, nominally 21/64 inch (8.3 mm) thick in accordance with Federal Specification FF-N-836. All new or revised 998 standards after year 2000 use Table 1. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for Resa
30、leNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16800 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 4 of 15 Table 1: Specimen Requirements and International Standards Material Steel Bolt Nut Thread Tolerance 6g 6
31、H International Standards ISO 965 JIS B 0209 ISO 965 JIS B 0209 Mechanical Properties Class Note 1 d 39 mm 4.8 9-12 International Standards ISO 898/1 JIS B 1051 ISO 898/2 Tolerances Product Grade A A for d M16 International Standards ISO 4759/1 ISO 4759/1 Finish Normal Plain Plain Optional JIS B 118
32、0 (finished) Associated Bolts JIS B 1180 M10 P1.5 x 20 mm Associated Nuts JIS B 1181 M10 P1.5 Note 1: Property class designations follow ISO 898/1. 3.3.3 Gauging. Follow the requirements described in the referenced test document for all test specimens used in one series of tests. 3.3.4 Criteria for
33、Test Standards without Gauging Requirements. For referee purposes, gauge threaded test specimens using variable thread gauging. Remove test specimens for the following reasons: 3.3.4.1 Damaged thread forms, tight or excessively loose fits, sticking or galling. 3.3.4.2 Rust or visible corrosion. 3.3.
34、4.3 Poor or irregular finish, drips or sags. 3.3.5. Static Shear Test Specimens (Pin and Collar). Unless otherwise specified by the regional test document, use test specimens described in ASTM D4562 or ISO 10123. See Table 3 category references. 3.3.6 Sealing Test Specimens (Pipe Tee or GM Sealing F
35、lange Test Fixture). Unless otherwise specified by the regional test document, use test specimens described in ASTM D5657 or ASTM D6396. See Table 3 category references. 3.3.6.1 For each test, use a minimum of 5 parts or assemblies per material batch for Production Part Approval Process (PPAP) submi
36、ssions. 3.3.6.2 All test specimens are taken from one production lot or batch. 3.4 Test Time. Not applicable. 3.5 Test Required Information. 3.5.1 Appendix A, Table A1 identifies the test and frequency after initial approval. 3.5.2 Initial Qualification. New or reformulated anaerobic shall be tested
37、 to all of its category (paragraph 7.1.8) relevant tests. See Appendix A, Table A1. 3.6 Personnel/Skills. Technicians (operators) must be experienced in these fixture and test procedures. It is an acquired skill learned through application. We recommend dedicated personnel for this procedure. 4 Proc
38、edure 4.1 Preparation. Follow the test specimen preparation procedures listed in Table 2 for the specified tests. 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
39、ENGINEERING STANDARDS GMW16800 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 5 of 15 Table 2: Documents Describing Anaerobic Preparation of Test Specimens Test ASTM ISO Static Shear Strength. Pin and Collar (P Aluminum alloy (ASTM B209, Alloy 2024, T3 temper); and brass (A
40、STM B36, alloy 8). Buff each in a circular manner with 400 emery cloth. Placing each test panel on a flat surface, cover half the panel (to the width permitted by the scraper) with test compound using a scraper (see Figure 1) capable of applying a 0.127 mm to 0.177 mm wet film thickness (0.254 mm to
41、 0.354 mm gap). A 0.127 mm coat is the maximum thickness for the lowest viscosity anaerobic in Table 1. Test the coated panel lying flat to GMW14729 for 72 h at 100% relative humidity and 38 C. A buffed blank panel may be used for comparative test conditions on the panel. Remove the coated portion c
42、arefully with a razor blade, non-abrasive cloth wet with water or suitable solvent. Examine (corrective vision) the previously coated area for red rust or white corrosion that cant be removed by scraping, wiping and buffing with the non-abrasive cloth (3M pad is suitable). Look at test panel materia
43、l results on each anaerobic independently. Avoid collective specimens on multiple panel materials influencing decisions. Test results shall be a GMW15357 (red) and GMW15359 (white), 9 or 10 scale rating. Note: Test panels are globally available from ACT Laboratories, 273 Industrial Drive, Hillsdale,
44、 MI 49242; or Q-Panel, 800 Canterbury Road, Westlake, OH 44145 www.q-. ASTM A109 grade 2 is Q-Panel stock number RS-14. ASTM B209 is Q-Panel stock number AR-14. Various metal supply companies sell ASTM B36 in sheets. Test panels can be made in house. Figure 1: Scraper Fixture 4.7 Stability. Each co
45、mpound is conditioned using actual or projected storage conditions must be capable of passing all the requirements using GMW14735. This includes stability at elevated temperature, low temperature and storage. See specific compound specification. 4.8 Appearance. Examine (corrective vision) the compou
46、nd spread on a flat surface under natural light. It shall be smooth, homogenous, free of undissolved particles, lumps, caked material, and particles of foreign matter. 4.9 Fluorescence. If specified, the purchased product must fluoresce when examined (corrective vision) after illumination with a 365
47、 nm black light. Use a black light intensity of 400 W/cm2 to 800 W/cm2. 4.10 Basic Cure Breakaway/Prevailing Off-Torque. Use ISO 10964. Assemble adhesive coated bolts and nuts per ISO 10964. Apply adhesive to bolt-nut assembly and cure at 23 C 2 C for conditions specified in each regional standard.
48、The fastener shall then be rotated in the off direction at a rate at 10 RPM, with a torque measuring device of suitable capacity and sensitivity. Torque readings shall be measured at initial breakaway, and at 90, 180, 270 and 360 degrees of rotation per ASTM D5649 method from the unseated position.
49、Breakaway and maximum prevailing-off torque shall be determined from these readings. 4.11 Torque Tension. This document does not specify torque tension. Part finishes and application methods (quantity and location) significantly influence torque tension results. The part and process responsible engineer(s) shall specify production part torque tens
