1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 07 23 Revised Para 3.0 inserted; para 3.2.3, 3.3 but once painted, the coating shall not be removed. 3.2.2 Paintability Painted substrate must comply with all requirements of ESB-M2P105-B; Paint Performance, Elastomeric, Exterior. 3.2.4 S
2、pecial Requirements for Unpainted Surfaces Exposed to Exterior Weathering These requirements may be waived if all areas of the finished parts exposed to exterior weathering are painted and any unpainted substrate is nonvisible when in vehicle position. 3.2.4.1 Color Stability Rating 3 minimum per AA
3、TCC Gray Scale for evaluating change in color after 1,600 h weatherometer exposure per FLTM BO 101-01 and also after 1 year Florida exposure, 5 south, direct weathering inland. No color tone change or surface crazing and no cracks when bent 90. Slight chalking and slight loss of gloss will be allowe
4、d provided an acceptable appearance can be achieved with conventional car finish cleaning materials. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. A1 A2 A3 5.1 SPECIFIC GRAVITY 1.0 1.0 0.9 (ASTM D 792) 5.2 COMPRESSION SET, % 90 95 90 (ASTM D 395, Method “B“, 22 h at 70 C) 5.3 FLEXURAL MODULUS, psi (MPa) (ASTM D 790, tangent, Method “T“, Procedure “B“) . At -30 +/- 1 C 90,000 120,000 200,000 (620) (826) (1379) . At 70 +/- 1 C 5,000 10,000 25,000 (34.4) (69) (172)
