1、 June 2009 Page 1 of 2 This document is restricted and may not be sent outside Navistar Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar Inc. NAVISTAR INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICAT
2、ION) NUMBER: CEMS GT-31 TITLE: Accelerated Weathering of Non-Metallic Materials CURRENT ISSUE DATE: June 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: February 2007 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This sp
3、ecification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits
4、prior to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive; added CEMS B-50 requirement; changed parameters for interior and exterior Xenon Arc test methods; updated reference specifications; editorial changes. 1.0 APPLICATION Thi
5、s method outlines conditions required for the accelerated weathering of non-metallic materials for the purpose of acceptance testing. 2.0 SCOPE Non-metallic materials submitted for approval to Materials Engineering that are subject to ultraviolet weatherability requirements are to be tested as state
6、d in the following methods. The specific method required, test duration, and pass/fail criteria are described in the applicable Truck Material Specifications (TMS) and Corporate Engineering Material Specifications (CEMS). Refer to the General Information section on page 2. 2.1 Restricted Chemical Su
7、bstances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the CEMS B-50 specification. 3.0 PREFERRED TEST METHODS New materials submitted for approval should be qualified using one of the following two methods, depending u
8、pon application. 3.1 Method A Interior Exposure Xenon Arc exposure per SAE J2412 with the following modifications: The filter shall provide a spectral power distribution similar to that of a Window-Q filter. The irradiance control point shall be 0.74W/m2 at 420 nm. 3.2 Method B Exterior Exposure Xen
9、on Arc exposure per SAE J2527 with the following modifications: The filter shall provide a spectral power distribution similar to that of a Daylight-Q filter. 4.0 ALTERNATE TEST METHODS Existing materials may have previously been qualified using one of the following methods, and some material specif
10、ications may continue to reference these methods. If so, the test data remains valid, and there is no need to requalify the material. The method used for material qualification shall be stated in all relevant documentation. Copyright Navistar International Corporation Provided by IHS under license w
11、ith INTERNNot for Resale-,-,-NUMBER: CEMS GT-31 TITLE: Accelerated Weathering of Non-Metallic Materials CURRENT ISSUE DATE: June 2009 June 2009 Page 2 of 2 This document is restricted and may not be sent outside Navistar Inc. or reproduced without permission from Corporate Technical Standards. Suppl
12、iers are required to assume all patent liability. 2009 by Navistar Inc. 4.1 Method C Exterior Exposure QUV exposure per ASTM G154 using UVA-340 lamps at an irradiance of 0.77 W/m2. Test cycle will alternate 8 hours of ultraviolet light exposure at 60 C, followed by 4 hours of condensing humidity at
13、50 C, and then repeat. 4.2 Method D Exterior Exposure QUV exposure per ASTM G154 using UVB-313 QFS-40 lamps at an irradiance of 0.43 W/m2. Test cycle will alternate 8 hours of light exposure at 60C, followed by 4 hours of condensing humidity at 50 C, and then repeat. 4.3 Method E Interior Exposure Q
14、UV exposure per ASTM G154 using UVA-351 lamps. Test cycle will alternate 8 hours of ultraviolet light exposure at 50 C, followed by 4 hours of condensing humidity at 40 C, and then repeat. 4.4 Method F Interior Exposure QUV exposure per ASTM G154 using UVA-351 lamps. Test cycle is continuous ultravi
15、olet light at 50 C only, with no condensing humidity. 5.0 REPORT Requirements for reporting test results are stated in the applicable TMS and CEMS documents. 6.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase cont
16、rolled copies of this specification by contacting: Materials Engineering and Technology Dept. Truck Development and Technology Center 2911 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: Automot
17、iveIHS.com Website: http:/ A.0 GENERAL INFORMATION (NOT A REQUIREMENT) Wavelength sizes Type of UV Light Wavelength, nanometer (nm) UV-A 320-380 nm UV-B 280-320 nm UV-C 180-280 nm Natural Sunlight 280-800 nm The Navistar Materials Engineering Group has determined that the following are equivalent: X
18、enon testing: 1200 kJ = 1000 hrs = one year South Florida exposure UV testing: 500 hrs UV-B 313 exposure = one year South Florida exposure UV testing: 1000 hrs UV-A 340 exposure = one year South Florida exposure UV testing: 1000 hrs UV-A 351 exposure = one year South Florida exposure Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for Resale-,-,-
