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Thanks to a particular casting process which allows to get the electric
conductivity levels higher than 80% IACS, 99.9% electrolytic copper
is used whenever very high thermal or electric conductivity is required
in parts which, owing to their geometry, have necessarily to be obtained
from casting. Very small quantities of added inoculants (beryllium,
cobalt, chromium, nickel, silicon) allow - though with a very small
conductivity loss - to remarkably increase mechanical characteristics
and thus to widen application fields; in this case, a complete sequence
of thermal treatments is compulsory.
Achieved according to the regulations of the table UNI 4855 "Casting
copper alloys as ingots and castings - Generalities and tests"
VALUES REFERRED TO FORGES PIECES
| Designazione |
Composizione |
Carico unitario
rottura a trazione
R
[kgf/mm2] |
Allungamento
A
[%] |
Durezza Brinell
HB
[kgf/mm2] |
Stato
di fornitura |
CM1
MAC 1
MAC 2
MAC 3
MAC 4
MAC 4/Zr |
Cu
Cu/Be/Co
Cu/Be/Co
Cu/Ni/Si/Cr
Cu/Cr
Cu/Cr/Zr |
20÷25
70÷85
100÷120
50÷65
35÷45
40÷55 |
40÷50
10÷18
0,5÷5
5÷15
15÷28
15÷30 |
45÷80
180÷220
340÷390
150÷190
105÷135
105÷140 |
Fuso in sabbia fucinato
Fucinato e trattato
Trafilato e trattato
Fuso in sabbia e trattato |
The trademarks of bronzes "CM" "DURAN" "MAC"
assure the unchangingness of mechanical and metallurgical characteristics
in the castings we produce.
CM1
Mechanical parts requiring high thermal and electrical conductivity;
electrode holders - tuyères - air lance - electric contacts -
elements for manifolds.
MAC 1
Pistons for die-casting.
MAC 2
Mold and injectors for plastics.
MAC 3Pistons for die-castings.
MAC 4 - MAC 4/ZR
Electrodes for spark erosion. Elements for welding lines.
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