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Properties for E-20, E-40 and E60. E Materials are a metal matrix composite of beryllium and the beryllium oxide.
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E-20 |
E-40 |
E-60 |
| Specification Minimums |
| |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
| Young's Modulus |
42,000 |
289 |
44,000 |
303 |
46,000 |
317 |
| Ultimate Tensile Strength |
38 |
401 |
55 |
291 |
50 |
273 |
| Elongation |
0.31% |
0.11% |
0.05% |
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| Room Temperature Values |
| Density |
2.045 g/cm3 |
0.0739 lb/in3 |
2.277 g/cm3 |
0.0823 lb/in3 |
2.513 g/cm3 |
0.0908 lb/in3 |
| Electrical Conductivity (ASTM B193) |
23-25% IACS |
13-15 IACS |
7-8 IACS |
| Thermal Conductivity |
210 W / moC |
220 W / moC |
230 W / moC |
| CTE, Coefficient of Thermal Expansion |
8.7 |
|
7.5 |
|
6.1 |
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| Specific Heat @ 20C J/Kg* K (BTU/lb* F) |
1.584 |
(0.379) |
1.407 |
(0.336) |
1.26 |
(0.310) |
| Melting Point oC(oF) |
2350oF |
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| |
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
| Beryllium Oxide (weight%) |
25.8 |
32.25 |
49.5 |
54.8 |
69.4 |
73.2 |
| Beryllium Oxide (nom. vol%) |
20 |
40 |
60 |
| Beryllium % |
Balance |
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| E Materials are prepared by impact grinding to powder |
| They are then canned, degassed, and HiP'd into a standard stock block, measuring 15" x 20" x21". |
| The stock block is sliced into cards, which are then sawn to specified sizes, lapped and machined to final dimensions |
| The parts can then be plated in accordance with final termination specification |
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