| |
|
Characteristic |
The largest bearings which RAR® is
able to make, at present, are those having volume up
to 560 liters, height up to 2000 mm and width up to
2000 mm. The longest delivery term is ten days from
the date of finishing and receiving of tools for
casting. At buyer’s request, Certificate of Quality
is issued containing chemical composition, physical,
chemical and mechanical properties. Following the
global trends for application of the alloys from the
ZnAlCuMg system, RAR® is
extending the application of SERBIAN BRONZE in the
sense replacement of steel, grey cast iron, brass,
aluminum alloys and even ZAMAK (AG-40A, AC41A)
alloy, as follow:
– hardware ,
especially for application in aluminum constructions
in order to avoid the electro-chemical corrosion
which is inevitable and strong in case of steel
bolt/aluminum
– armature ,
first of all RAR-12, which belongs to the alloys
with the highest castability as it has high
corrosion resistance and anti-toxicity
– fittings ,
the same reason as armature
– extruded alloy
RAR-27 has hardness up to 150 HB, tensile strength
of about 570 MPa.
|
|
Cooperation |
In cooperation with NISSAL, Niš RAR® produces
SERBIAN BRONZE in the form of various profiles
(round and rectangular tubes, wires, bands etc.) and
it is recommended as the construction material as it
has, apart from other positive properties, the
excellent machinability.
|
Properties
|
Units
|
RAR-12
|
RAR-27
|
Zamak-3
|
Silumin
AlSi-12
|
Bronze
|
Iron
|
Ma Vecible Iron
|
Density
|
kg/m ³
|
6030
|
5000
|
6600
|
2650
|
8880
|
7100
|
7300
|
Melting Range
|
°C
|
377-432
|
375-484
|
381-387
|
577
|
762-928
|
1180
|
1230
|
Coefficient of linear xpansion
|
10-6 m/mК
|
24
|
26
|
27.4
|
21
|
18.5
|
12.1
|
11.9
|
Electrical Conductivity at 24 °C
|
% IACS
|
28
|
30
|
27
|
27
|
10
|
5
|
6
|
Thermal Conductivity at 24 °C
|
W/mK
|
116
|
125
|
113
|
95
|
47
|
50
|
52
|
Solid Contraction
|
%
|
1-1.3
|
=1.3
|
1
|
0.9-1
|
1.5
|
1
|
1.5
|
Tensile Strength
|
MPa
|
300
|
400
|
283
|
147
|
240
|
214
|
345
|
Yield Strength, 0.2% Offset
|
MPa
|
210
|
370
|
221
|
120
|
124
|
124
|
221
|
Elongation
|
%
|
1-2
|
3-6
|
10
|
4
|
20
|
-
|
10
|
Hardness, Brinell 500-10-30
|
HB
|
94
|
115
|
82
|
50
|
60
|
210
|
110
|
|
|
|
