BE MATERIALS   Suffix Requirements Grade 1A Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Grade 7 Grade 8 A14 Heat Resistance, ASTM D 573, 70 h at 70°C:                   Change in hardness, max. points   +15 +15             Change in tensile strength, max. %   -15 -15             Change in ultimate elongation, max. %   -40 -40           B14 Compression set, ASTM D 395, Method B, max. %, 22 h at 100°C   25 25           C12 Resistance to ozone, ASTM D 1171, quality retention rating, min. %   100 100           C20 Resistance to outdoor aging, ASTM D 1171   † †           EO14 Fluid resistance, ASTM D 471, Oil No. 1, 70 h at 100°C                   Change in hardness, max. points   ± 10 ± 10 ± 10 ± 10 ± 10       Change in tensile strength, max. %   -30 -30 -30 -30 -30       Change in ultimate elongation, max. %   -30 -30 -30 -30 -30       Change in volume, max. %   -10 to +15 -10 to +15 -10 to +15 -10 to +15 -10 to +15     EO34 Fluid resistance, ASTM D 471, Oil No. 3, 70 h at 100°C                   Change in tensile strength, max. %   -50 -50             Change in ultimate elongation, max. %   -40 -40           F17 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -40°C   pass             F19 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -55°C     pass           G21 Tear resistance, ASTM D 624, Die C: 10 MPa tensile load and over, min. kN/m     26           K11 Adhesion, ASTM D 429, min: Method A, min, MPa     2.4           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