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Home > Elastomers > Material Specifications 2
Material Specifications
Part 2
Japanese Industrial Standard (JIS) B 2401 O-rings
Another general material specification standard is the Japanese Industrial Standard (JIS) B 2401 “O-rings.” The classification system recommended by this standard is twofold, by material and by size and use. The material classification is as follows:
|
Class |
Remarks |
Duro |
Tensile Strength |
Elongation |
Compression
Set |
Marking |
| 1 A | Non-mineral oil use | 70 | > 8.0 | 200% | 40% (70hr@120°C) | 1 Blue Dot |
| 1 B | Non-mineral oil use | 90 | > 12.0 | 80% | 40% (70hr@120°C) | 2 Blue Dots |
| 2 | Non-gasoline use | 70 | > 8.0 | 160% | 25% (70hr@100°C) | 1 Red Dot |
| 3 | Non-animal or -vegetable oil use | 70 | > 8.0 | 120% | 25% (70hr@100°C) | 1 Yellow Dot |
| 4 C | Heat resistant | 70 | > 3.5 | 50% | 30% (22hr@175°C) | None |
| 4 D | Heat resistant | 70 | > 8.0 | 160% | 40% (22hr@175°C) | 1 Green Dot |
Next Topic Material Specifications Part 3, Other Specifications
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