BC MATERIALS BASIC REQUIREMENTS   Tensile Strength, min           Durometer Hardness, ± 5 Points Mpa psi Ultimate Elognation, min. % Heat Aged, ASTM D 573, 70 h at 70 ° C Oil Immersion, ASTM D 471, No. 3 Oil, 70 h at 70 ° C Compression Set, ASTM D 395, Solid, max. %; 22 h at 70 ° C Available Suffixes Grade Numbers 30 3 435 300 2, 5 30 7 1015 400 2, 5 30 10 1450 500 2, 5 30 14 2031 500 2           40 3 435 300 2 40 7 1015 400 2, 5 40 10 1450 500 2, 5 40 14 2031 500 2, 5 40 17 2466 500 2           50 3 435 300 2, 5 50 7 1015 300 2, 5 50 10 1450 350 2, 5, 6 50 14 2031 400 2, 5, 6 50 17 2466 450 2, 6 50 21 3046 500 2, 6 50 24 3481 500 2, 6           60 3 435 300 3, 5 60 7 1015 300 3, 5 60 10 1450 350 3, 5, 6 60 14 2031 350 3, 6 60 17 2466 400 3, 6 60 21 3046 400 3, 6 60 24 3481 400 3, 6           70 3 435 200 3, 5 70 7 1015 200 3, 5 70 10 1450 250 3, 5, 6 70 14 2031 300 3, 5, 6 70 17 2466 300 3, 6 70 21 3046 300 3, 6           80 3 435 100 4 80 7 1015 100 4 80 10 1450 100 4 80 14 2031 150 4           90 3 435 50 4 90 7 1015 100 4 90 10 1450 150 4 90 14 2031 150 4