AA MATERIALS   Suffix Requirements Grade 1A Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Grade 7 Grade 8 A13 Heat Resistance, ASTM D 573, 70 h at 70°C:                   Change in hardness, max. points   ± 15   +10 +10         Change in tensile strength, max. %   ± 30   -25 -25         Change in ultimate elongation, max. %   -50   -25 -25       B13 Compression set, ASTM D 395, Method B, max. %, 22 h at 70°C     25 25 25       B33 Compression set, ASTM D 395, Method B, max. %, 22 h at 70°C     50 50 50       C12 Resistance to ozone, ASTM D 1171, quality retention rating, min.. %   85 † 85 †       C20 Resistance to outdoor aging, ASTM D 1171, quality retention rating, min. %   85 85 85 85       EA14 Water resistance, ASTM D 471, 70 h at 100°C, volume change, max. %   10 10 10 10       F17 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -40°C   pass pass pass pass       K11 Adhesion, ASTM D 429, min: Method A, min, MPa   1.4 2.8 1.4 2.8       P2 Staining resistance, ASTM D 925, Method B, control panel   pass pass pass pass       Z (Special requirements). Any special requirements shall be specified in detail, including test methods.   ABasic properties only - no suffix requirements for Grade No. 1. † The requirement is applicable, and materials are available having these characteristics, but values have not yet been established