| All data is for information only------(<---links) | |
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| PRODUCT DATA of CDA 170 |
| Material | CDA 170 |
| Chemical Composition | 1.8% Be, 0.3% Co + Ni, Rem. Cu |
| EXPERIENCE IN PRACTICE |
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| Equivalent Designations | ASTM B194; BS 2870; BS 2873; CB101; CDA170; Beryllium-Copper 1.8% |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Specific Gravity | 8.25 |
| ELECTRICAL PROPERTIES |
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| Electrical Conductivity | 18 to 38 %IACS Remark:Solution treated has the lowest conductivity. |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 84 to 150 W/m.K |
| Thermal Expansion Coefficient | 17 μstrain/°C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| Atmospheric Corrosion | Generally good |
| Stress Corrosion Status | High Resistance to SCC: Table 1 Remark:High resistance only when solution treated/work hardened, then precipitation hardened Data Quality: Design Data |
| SPECIAL RECOMMENDATIONS |
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| Special Recommendations | The alloy is age-hardeneable and the heat treatment is as follows: - solution treat 760 - 820°C – Water Quench - age 315 - 350°C – Air Cool · Solution treatment may be from 10 to 30 minutes for light materials (i.e. wire or strip), extending up to several hours for bulky castings. Precipitation hardening normally requires 2 hours at 310°C or 30 minutes at 350°C. · Fabrication methods involving either welding, brazing or high temperature soldering should be performed whilst the alloy is in the soft condition and then followed by the solution and ageing treatments. |
| Lessons Learned | Do use non-spark tooling including chisels, spanners, shovels etc |