2,315
edits
Changes
→Other Precipitation Hardening Copper Alloys
|Be 1.6 - 1.8<br />Co 0.3<br />Ni 0.3<br />Cu Rest
|8.4
|8 - 9[[#text-reference1|<sup>a</sup>]]<br />12 - 13[[#text-reference2|<sup>b</sup>]]<br />11[[#text-reference3|<sup>c</sup>]]
|14 - 16<br />21 - 22<br />19
|11 - 12.5[[#text-reference1|<sup>a</sup>]]<br />7.7 - 8.3[[#text-reference2|<sup>b</sup><br />]]9.1[[#text-reference3|<sup>c</sup>]]
|110
|17
|125[[#text-reference1|<sup>a</sup>]]<br />135[[#text-reference2|<sup>b</sup>]]
|ca. 380
|890 - 1000
|Be 1.8 - 2.1<br />Co 0.3<br />Ni 0.3<br />Cu Rest
|8.3
|8 - 9[[#text-reference1|<sup>a</sup>]]<br />12 - 13[[#text-reference2|<sup>b</sup>]]<br />11[[#text-reference3|<sup>c</sup>]]
|14 - 16<br />21 - 22<br />19
|11 - 12.5[[#text-reference1|<sup>a</sup>]]<br />7.7 - 8.3[[#text-reference2|<sup>b</sup>]]<br />9.1[[#text-reference3|<sup>c</sup>]]
|110
|17
|125[[#text-reference1|<sup>a</sup>]]<br />135[[#text-reference2|<sup>b</sup>]]
|ca. 380
|870 - 980
|Co 2.0 - 2.8<br />Be 0.4 - 0.7<br />Ni 0.3<br />Cu Rest
|8.8
|11 - 14[[#text-reference1|<sup>a</sup>]]<br />25 - 27[[#text-reference2|<sup>b</sup>]]<br />27 - 34[[#text-reference3|<sup>c</sup>]]
|19 - 24<br />43 - 47<br />47 - 59
|7.1 - 9.1[[#text-reference1|<sup>a</sup>]]<br />3.7 - 4.0[[#text-reference2|<sup>b</sup>]]<br />2.9[[#text-reference3|<sup>c</sup>]]
|210
|18
|131[[#text-reference1|<sup>a</sup>]]<br />138[[#text-reference2|<sup>b</sup>]]
|ca. 450
|1030 - 1070
|Ni 1.4 - 2.2<br />Be 0.2 - 0.6<br />Co 0.3<br />Cu Rest
|8.8
|11 - 14[[#text-reference1|<sup>a</sup>]]<br />25 - 27[[#text-reference2|<sup>b</sup>]]<br />27 - 34[[#text-reference3|<sup>c</sup>]]
|19 - 24<br />43 - 47<br />47 - 59
|7.1 - 9.1[[#text-reference1|<sup>a</sup>]]<br />3.7 - 4.0[[#text-reference2|<sup>b</sup>]]<br />2.9[[#text-reference3|<sup>c</sup>]]
|230
|18
|131[[#text-reference1|<sup>a</sup>]]<br />138[[#text-reference2|<sup>b</sup>]]
|ca. 480
|1060 - 1100
|}
<div id="text-reference1"><sub>a</sub> solution annealed, and cold rolled</div>
<div id="text-reference2"><sub>b</sub> solution annealed, cold rolled, and precipitation hardened</div>
<div id="text-reference3"><sub>c</sub> solution annealed, cold rolled, and precipitation hardened at mill (mill hardened)</div>
</figtable>
<figtable id="tab:Mechanical Properties of Selected Copper-Beryllium Alloys">
!Elongation<br />A<sub>50</sub><br />[%]
!Vickers<br />Hardness<br />HV
!Bend Radius[[#text-reference4|<sup>1)</sup>]]<br />perpendicular to<br />rolling direction!Bend Radius[[#text-reference4|<sup>1)</sup>]]<br />parallel to<br />rolling direction
!Spring Bending<br />Limit σ<sub>FB</sub><br />[MPa]
!Spring Fatigue<br />Limit σ<sub>BW</sub><br />[MPa]
|-
|CuBe1,7
|R 390[[#text-reference5|<sup>a</sup>]]<br />R 680[[#text-reference5|<sup>a</sup>]]<br />R 1030[[#text-reference6|<sup>b</sup>]]<br />R 1240[[#text-reference6|<sup>b</sup>]]<br />R 680[[#text-reference7|<sup>c</sup>]]<br />R 1100[[#text-reference7|<sup>c</sup>]]
|380 -520<br />680 - 820<br />1030 - 1240<br />1240 - 1380<br />680 - 750<br />1100 - 1200
|≥ 180<br />≥ 600<br />≥ 900<br />≥ 1070<br />≥ 480<br />≥ 930
|-
|CuBe2
|R 410[[#text-reference5|<sup>a</sup>]]<br />R 690[[#text-reference5|<sup>a</sup>]]<br />R 1140[[#text-reference6|<sup>b</sup>]]<br />R 1310[[#text-reference6|<sup>b</sup>]]<br />R 690[[#text-reference7|<sup>c</sup>]]<br />R 1200[[#text-reference7|<sup>c</sup>]]
|410 -540<br />690 - 820<br />1140 - 1310<br />1310 - 1480<br />690 - 760<br />1200 - 1320
|≥ 190<br />≥ 650<br />≥ 1000<br />≥ 1150<br />≥ 480<br />≥ 1030
|-
|CuCo2Be<br />CuNi2Be
|R 250[[#text-reference5|<sup>a</sup>]]<br />R 550[[#text-reference5|<sup>a</sup>]]<br />R 650[[#text-reference6|<sup>b</sup>]]<br />R 850[[#text-reference6|<sup>b</sup>]]<br />R 520[[#text-reference7|<sup>c</sup>]]
|250 - 380<br />550 - 700<br />650 - 820<br />850 - 1000<br />520 - 620
|≥ 140<br />≥ 450<br />≥ 520<br />≥ 750<br />≥ 340
| <br /> <br />220<br />250<br />210
|}
</figtablediv id="text-reference4"><supsub>1)</supsub> t: Strip thickness max. 0.5 mm<br /div><supdiv id="text-reference5"><sub>a</supsub>solution annealed, and cold rolled<br /div> <supdiv id="text-reference6"><sub>b</supsub>solution annealed, cold rolled, and precipitation hardened<br /div> <supdiv id="text-reference7"><sub>c</supsub>solution annealed, cold rolled, and precipitation hardened at mill (mill hardened)</div></figtable> <br/><br/>
====<!--5.1.6.2-->Other Precipitation Hardening Copper Alloys====
=====<!--5.1.6.2.1-->Copper-Chromium Alloys=====
As the phase diagram shows, copper-chromium has a similar hardening profile compared to CuBe (<xr id="fig:Copper corner of the copper-chromium phase diagram for up to 0.8 wt% chromium"/><!--(Fig. 5.32)-->). In the hardened stage CuCr has limitations to work hardening. Compared to copper it has a better temperature stability with good electrical conductivity. Hardness and electrical conductivity as a function of cold working and precipitation hardening conditions are illustrated in [[#figures8|(Figs. 6 – 9)]]<!--Figs. 5.33-5.35--> (and <xr id="tab:Physical Properties of Other Precipitation Hardening Copper Alloys"/><!--(Tables 5.19)--> and <xr id="tab:Mechanical Properties of Other Precipitation Hardening Copper Alloys"/><!--(Tab. 5.20)-->).
Copper-chromium materials are especially suitable for use as electrodes for resistance welding. During brazing the loss in hardness is limited, if low melting brazing alloys and reasonably short heating times are used.
|Cr 0.3 - 1.2<br />Cu Rest
|8.89
|26[[#text-reference8|<sup>a</sup>]]<br />48[[#text-reference9|<sup>b</sup>]]|45[[#text-reference8|<sup>a</sup>]]<br />83[[#text-reference9|<sup>b</sup>]]|3.8[[#text-reference8|<sup>a</sup>]]<br />2.1[[#text-reference9|<sup>b</sup>]]|170[[#text-reference8|<sup>a</sup>]]<br />315[[#text-reference9|<sup>b</sup>]]
|17
|112
|Zr 0.1 - 0.3<br />Cu Rest
|8.9
|35[[#text-reference8|<sup>a</sup>]]<br />52[[#text-reference9|<sup>b</sup>]]|60[[#text-reference8|<sup>a</sup>]]<br />90[[#text-reference9|<sup>b</sup>]]|2.9[[#text-reference8|<sup>a</sup>]]<br />1.9[[#text-reference9|<sup>b</sup>]]|340[[#text-reference8|<sup>a</sup>]]
|16
|135
|Cr 0.5 - 1.2<br />Zr 0.03 - 0.3<br />Cu Rest
|8.92
|20[[#text-reference8|<sup>a</sup>]]<br />43[[#text-reference9|<sup>b</sup>]]|34[[#text-reference8|<sup>a</sup>]]<br />74[[#text-reference9|<sup>b</sup>]]|5.0[[#text-reference8|<sup>a</sup>]]<br />2.3[[#text-reference9|<sup>b</sup>]]|170[[#text-reference8|<sup>a</sup>]]<br />310 - 330[[#text-reference9|<sup>b</sup>]]
|16
|110[[#text-reference8|<sup>a</sup>]]<br />130[[#text-reference9|<sup>b</sup>]]
|ca. 500
|1070 - 1080
|}
<div id="text-reference8"><sub>a</sub> solution annealed, and cold rolled</div>
<div id="text-reference9"><sub>b</sub> solution annealed, cold rolled, and precipitation hardened</div>
</figtable>
<figtable id="tab:Mechanical Properties of Other Precipitation Hardening Copper Alloys">
