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No | Item | Demmand | |
1 | Longterm hydrostactic Pressure strength(20℃,50years,95%),Mpa | ≥8.0 | |
2 | Shortterm hydrostactic Pressure strength Mpa | 20℃ | 9.0 Toughness failure time(h)>100 |
80℃ | 4.6 Brittleness failure time(h)>165 |
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4.0 Failure time (h)>1000 |
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3 | Heat stability ,min(200℃) | >20 | |
4 | Stress crack resistance(80℃,4.0Mpa),h | ≥1000 | |
≥170 | |||
5 | Compression Recorvery ,h(80℃,4.0Mpa) | >170 | |
6 | Longitudinal reversion ,%(110℃) | ≤3 | |
7 | Elongation at break,% | >350 | |
8 | Weathering resistance (After receiving no less than 3.5kMJ/m2weathing energy accumulatively) | can still meet the demmands of item 2、3、7 and be good for welding |
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