A-A-52518
TABLE II. Type of vehicle service.
|
Materials |
Passenger cars 1/ |
Trucks |
Off-road (1) |
|
|
Commercial |
Military |
|||
|
RHC by volume (minimum) |
50% 45% |
55 |
50 |
55 |
|
RHC by type & distribution NR, IR, SBR, BR |
100% 75% max --- 25% min |
100% --- |
75% max 25% min |
--- --- |
|
Carbon Black parts by weight /100 parts by weight RHC |
50-90 50-95 |
50-70 |
50-85 |
--- |
|
Specific gravity (maximum) |
1.17 1.18 |
1.16 |
1.16 |
1.18 |
|
Durometer, Shore A |
60 + 5 60 + 5 |
62 + 5 |
62 + 5 |
60-75 |
|
Tensile stress at 300% elongation (minimum MPa) |
5.9 5.9 |
6.9 |
6.9 |
6.9 |
|
Tensile at Break (minimum MPa) |
17.2 15.2 |
19.3 |
17.2 |
--- |
|
Ultimate elongation (minimum %) |
475 475 |
475 |
475 |
450 |
|
Acetone Extract (maximum %) |
27.5 30 |
25 |
27.5 |
18 |
(1) See Tire and Rim Yearbook for identification.
1/ The data in the two columns are based on the amount of RHC, either 50% or 45% by volume.
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