BG 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 100°C:                   Change in hardness, max. points       ± 5 ± 5 ± 5       Change in tensile strength, max. %       ± 15 ± 15 ± 15       Change in ultimate elongation, max. %       -15 -15 -15     B14 Compression set, ASTM D 395, Method B, max. %, 22 h at 100°C   25 50 50 25 25 25   B34 Compression set, ASTM D 395, Method B, max. %, 22 h at 100°C   25     25 25     C12 Resistance to ozone, ASTM D 1171, quality retention rating, min.. %     † †         EA14 Water resistance, ASTM D 471, 70 h at 100°C                   Change in hardness, points   ± 10         ± 10     Change in volume, %   ± 15         ± 15   EF11 Fluid resistance, ASTM D 471, Reference Fuel A, 70 h at 23°C                   Change in hardness, points   ± 10         ± 10     Change in tensile strength, max. %   -25         -25     Change in ultimate elongation, max. %   -25         -25     Change in volume, max. %   -5 to +10         -5 to +10   EF21 Fluid resistance, ASTM D 471, Reference Fuel B, 70 h at 23°C                   Change in hardness, points   0 to -30         0 to -30     Change in tensile strength, max. %   -60         -60     Change in ultimate elongation, max. %   -60         -60     Change in volume, max. %   0 to +40         0 to +40   EO14 Fluid resistance, ASTM D 471, Oil No. 1, 70 h at 100°C                   Change in tensile strength, max. %   -5 to +10 -7 to +5 -7 to +5 -5 to +15 -5 to +15 -5 to +15     Change in ultimate elongation, max. %   -25 -20 -20 -25 -25 -25     Change in durometer hardness, max. points   -45 -40 -40 -45 -45 -45     Change in volume, max. %   -10 to +5 -5 to +10 -5 to +5 -10 to +5 -10 to +5 -10 to +5   EO34 Fluid resistance, ASTM D 471, Oil No. 3, 70 h at 100°C                   Change in tensile strength, max. %   -10 to +5 -10 to +5 -10 to +5 0 to -15 0 to -20 -10 to +5     Change in ultimate elongation, max. %   -45 -35 -35 -45 -45 -45     Change in durometer hardness, max. points   -45 -40 -40 -45 -45 -45     Change in volume, max. %   0 to +25 16 to +35 0 to +6 0 to +35 0 to +35 0 to +25   F16 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -35°C             pass   F17 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -40°C   pass       pass     F19 Low-temperature brittleness, ASTM D 2137, Method A, 9.3.2, nonbrittle after 3 min at -55°C     pass pass pass       K11 Adhesion, ASTM D 429: Method A, MPa   B B B B B B   P2 Staining resistance, ASTM D 925, Method B, control panel     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. BMaterials are available that can be bonded to metal during vulcanization. Becauase of the wide variety of cojpunts in use, combined with manifold end-use requirements, no values are shown. Test Methods D 429 and requirements should be agreed upon by the supplier and user. † The requirement is applicable, and materials are available having these characteristics, but values have not yet been established