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Aluminum Bus Conductor

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Bending and Forming
 
    Aluminum bus conductors can be formed by the same procedures and practices that are used for other metals. The most important factors governing the bending of bus conductors are: (I) the ductility of the conductor, (2) the size and shape of the conductor, (3) the method of bending, and (4) the bending equipment used.

 
    A metal must be ductile enough to permit both stretching and compression to take place. However, elongation alone is not a complete criterion for ductility. The ratio of yield strength to tensile strength must also be taken into account. A combination of a high elongation value and a low ratio of yield strength to tensile strength provides the most satisfactory ductility.

    Another factor that governs bending is the size and shape of the bus conductor. For example, in the case of a tube, the sharpness of a bend depeods not only on the diameter of the tube, but also on the ratio of wall thickness to diameter. In the case of edgewise bends of rectangular angle of 90 degrees to minimum inside radli.

Properties
Aluminium and Copper Specifications

Parameters Aluminium Copper
Relevant Standards IEC 60105
ISO 209-1,2
IEC 60028
Physical Properties
Chemical Composition
Specific Heat     gm.cal/℃
Density         gm/cm2
Melting Point    ℃  
 
 
0.092
2.91
660
 
99% pure
0.220
8.89
1083
Mechanical Properties
Ultimate Tensile Strength      kgf/mm2
Ultimate Shearing Strength    kgf/mm2
Elastic Modulus             kgf/mm2
0.2% Tensile-proof Strength   kgf/mm2
 
20.5/25
15
6,700
16.5/22
 
22-26
16-19
12000
60-80% of tensile strength
Electrical Properties
Specific Resistance         ʋʊcm
Volume Conductivity       ʋʊmm2
Conductivity              % IACS
Co-efficient of expansion    mm/m/℃
 
3.133
31.9
57
2.3*10-5
 
1.7241
58
100
1.73*10-5

                                           Mechanical Properties of Aluminum Bus Conductor and Related Alloys
                            (The Aluminum Association ; ASTM B 236, B 241, and B 429; and Manufacturer’s Listings)

 

Product Alloy and Temper Thickness in
Ultimates
Tensile Strength (ksi)
At 20 (68。F)
Typical 
Ultimate
Typical Yield Typical(a) 
Elongation
(Percent - in 2 in. 
Or 4 Dia)
Minimum 
Ultimate
Minimum 
Yield
Extruded rod, bar tube,
pipe and shapes
1350-H111 All 8.5 3.5     35.0
6101-T6 0.125-0.500 29.0 25.0 32.0 28.0 15.0
6101-T61 0.125-0.749
0.750-1.499
1.500-2.000
20.0
18.0
15.0
15.0
11.0
8.0
     
6101-T63
6101-H111
6101-T64
6101-T65
0.125-0.500
0.250-2.000
0.125-1.000
0.125-0.749
27.0
12.0
15.0
25.0
22.0
8.0
8.0
20.0
14.0 11.0  
Extruded pipe(c) 6061-T6
6063-T6
Pipe size 1.0 & 
over Pipe sizes,all
38.0
30.0
 
35.0
25.0
45.0
35.0
40.0
31.0
10.0 min
8.0 min
Rolled bar 1350-H12 0.125-1.000 12.0 8.0 14.0 12.0  
Sawed-plate bar or sheet 1350-H112 0.125-0.499
0.500-1.000
1.001-3.000
11.0
10.0
9.0
6.0
4.0
3.5
    10.0min
16.0min
22.0min
Rolled sheet
(for shearing or forming)
1350
1350-H12
1350-H14
0.020-0.249 8.0
12.0
14.0
  12.0
14.0
16.0
4.0
12.0
14.0
20-30 min
4-9 min
3-6 min
1350-H16
1350-H18
0.020-0.125 16.0
18.0
  18.0 16.0 2-4 min
2-4 min
Cast Alloy for Bus 1350-F 
1050
1 in. And up     8.5 3.5 35.0
Cast Alloy for Fittings A356.0-T61   37.0       5.0






 

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