|
For general use and for quality castings; they are made of the combination
between coppper and tin. They are provided with the best mechanical
and optimal antifriction characteristics, wear resistance, low friction
coefficient at strong creep and sliding pressures, remarkable hardness,
satisfactory thermal conductivity.
Achieved according to the regulations of the table UNI 4855 "Casting
copper alloys as ingots and castings - Generalities and tests"
| Designation |
Composition |
Unitary
ultimate tensile stress
R
[kgf/mm2] |
Elongation
A
[%] |
Brinell
hardness
HB
[kgf/mm2] |
Supply |
CM3
CM3/A
CM10
CM12 |
Cu/Sn
Cu/Sn
Cu/Sn
Cu/Sn |
25÷30
25÷32
20÷28
18÷25 |
8÷15
14÷20
2÷4
1÷2 |
70÷85
70÷85
70÷90
100÷120 |
Sand casting
Chill casting
Continuous casting
Centrifugal casting |
The trademarks of bronzes "CM" "DURAN" "MAC"
assure the unchangingness of mechanical and metallurgical characteristics
in the castings we produce.
CM3 - CM3/A
Parts subject to impact strength; bushes and bearings; magnifications
and nut screws; sliding blocks and gibs; gas rings; parts in general
for machine tools, for die-casting, for plastic materials molding.
CM10
For high-load surfaces without impact strength, bushes and bearings
for quick turning shafts; helical wheels for quick turning gears; nut
screws, gibs and sliding plates.
CM12
For sliding surfaces subject to high loads in the worst lubrification
conditions without impact strength; bushing for press columns.
|
