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6101 Aluminium Flat Bus Bar

Author:Frank Time:2023-05-05

6101 Aluminium busbar
Alloys and Tempers

    Pure aluminum has a conductivity of about 65 percent of the International Annealed Copper Standard (lACS). Aluminum can be produced 99.99 percent pure; however, this purity is costly to achieve and the mechanical properties are low.
    After World War II, a new conductor alloy, 6101, was developed wbich had considerably higher yield strength and better creep resistance than 1350. The alloy contained magnesium and silicon for high mechanical strength without significant reduction in conductivity. The strength of this alloy (6101) is obtained by suitable heat treaunents, occasionally combined with some cold work.


Parameters Aluminium Copper
Relevant Standards IEC 60105
ISO 209-1,2
IEC 60028
Grade 6101 100% IACS
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

    Other aluminum alloys may be used for bus conductors. However, they should be used with care since conductivity and mechanical properties can be greatly affected by small amounts of alloying elements.

Flatwise Bending Radius
 

Type of Bar Alloy and Temper Thickness  in. Radius  min.
  1350-H11 All 1 * thickness
Extruded 6101-H11 0.250-0.750
0.751-1.000
1 * thickness
2 * thickness
6101-T6 0.125-0.375
0.376-0.500
2 * thickness
21/2 thickness
6101-T61 0.125-0.500
0.501-0.749
0.750-1.000
1.001-1.625
1 * thickness
2 * thickness
3 * thickness
4 * thickness
6101-T63 0.125-0.375
0.376-0.500
0.501-1.000
1 * thickness
11/2 thickness
21/2 thickness
6101-T64 0.125-0.750
0.751-1.000
1 * thickness
2 * thickness
6101-T65 0.125-0.500
0.501-0.749
1 * thickness
2 * thickness
Rolled 1350-H12 All 1 * thickness
Sawed plate 1350-H112 All 1 * thickness

Applicable to widths up through 6 inches in the T6,T61,T63 and T65 temper and to widths up through 12 inches for all other listed tempers. Bend radius for greater widths are subject to inquiry.

                                        Physical and Electrical Properties of Aluminum Wrought Bus Conductor Alloys
                                                               (ASTM B 236,B 317,and The Aluminum Association)

Applying to all alloys and tempers of wrought 
alloys, typical values.
 
Weight, lb/cu in. (rounded) 0.098
Specific heat, cal/gm/℃ or BTU/LB/F 0.214 
at 70℃ for 1350 and 0.220 for 6101(e).
 
Coefficient of thermat expansion (linear)/℃
 0.000023.
Specific gravity - 2.70.
Modulus of Elasticity, Typical, psi 10 * 106, up to 2% higher
 in compression.
 
Note : if two values are shown, the more favorable is “typical”; 
the less favorable is designated “minimum” provided a higher
 value is favorable. Otherwise the term “guaranteed” is 
sometimes used.

 
Properties Alloy and Temper
  1350
Any Temper
6101
 -T6
6101
-T61
6101
-T63
6101
-T64
6101
-T65
6101-T6
Typical
6063
-T6 typical
Thermal conductivity at 20℃,watts/sq.
 In /in /℃
5.9-6.0 5.3-5.4 5.5-5.6 5.4-5.5 5.7-5.8 5.7-5.8 3.9 5.1
Volume electrical conductivity at 20℃ 
percent IACS(a).
61-62 55-56 57-58 56-57 59.5-60.5 56.5-57.5 42.43 63(a)
Electrical resistivity (de) at 20℃ (68F)
 microhms/sq.in./ft(c).
13.35-
13.14
14.81-
14.55
14.29-
14.04
14.55-
14.29
13.69-
13.46
14.42-
14.17
19.39-
18.94
15.37
Temperature coefficient of electrical 
resistance at 20℃ /℃(d).
0.00403-
0.00410
0.00363-
0.00370
0.00377-
0.00383
0.00370-
0.00377
0.00393-
0.00400
0.00373-
0.00380
0.00284-
0.00277
0.00350
 
(a) Typical conductivities of 6101 alloys from Standards of The Aluminum Association. The conductivity of 6063·T6 alloy pipe for outdoor service may be taken as 55.% lACS for current ratings, per NEMA Standard.
(b) To obtain de resistance at 20"'C in microhms multiply table value by length in feet and divide by cross sectional area in sq. in.
(c) Increasing by 0.018 for each 100"C above 70'C (specific heat).
(d) The higher of a pair of coettlclents corresponds to the higher vafue of the pair of conductivity values.


                                          Temperature Coefficients of Resistance (dc) for Bus-conductor Aluminum Alloys 
                                                            And Representative Value for Commercial Copper Bus Bar

 
Aluminum Alloys and Tempers, And Conductivity % (IACS) (a)

  6061-
T6
Typical
6063-T6
Typical
6101-T6
Minimum
6101-T63
Minimum
6101-T6
Minimum
6101-T61
Typical
  6101-T64
Minimum
  1350 
Minimum
1350 
Typical
Representative 
Value
 Commercial 
Copper 
Busbar
% IACS
Temp. C.
40% 53%
(b)
55% 56% 57% 58% 59% 59.5% 60% 61% 62% 98%
0
10
20
25
.00279
.00271
.00264
.00261
.00377
.00363
.00350
.00344
.00392
.00377
.00363
.00357
.00400
.00384
.00370
.00363
.00407
.00391
.00377
.00370
.00415
.00398
.00383
.00376
.00423
.00406
.00390
.00382
.00427
.00409
.00393
.00386
.00431
.00413
.00396
.00388
.00438
.00420
.00403
.00395
.00446
.00427
.00410
.00401
.00417
.00401
.00385
.00378
30
40
50
60
.00257
.00251
.00245
.00239
.00338
.00327
.00317
.00307
.00351
.00339
.00328
.00317
.00357
.00344
.00333
.00322
.00363
.00350
.00338
.00327
.00369
.00356
.00344
.00332
.00375
.00362
.00349
.00337
.00378
.00364
.00352
.00340
.00381
.00367
.00354
.00342
.00387
.00373
.00360
.00347
.00393
.00379
.00365
.00352
.00371
.00358
.00345
.00334
70
80
90
100
.00233
.00228
.00223
.00218
.00298
.00289
.00281
.00274
.00307
.00298
.00290
.00282
.00312
.00303
.00294
.00285
.00316
.00307
.00298
.00289
.00322
.00312
.00302
.00293
.00326
.00316
.00306
.00297
.00329
.00318
.00308
.00299
.00331
.00320
.00310
.00301
.00335
.00325
.00314
.00305
.00340
.00329
.00318
.00309
.00323
.00313
.00303
.00294
 
(a) For alloys not shown. obtain conductivities from Table 13·2, and interpolate from the listed values.
 
(b) Per note on Table 1;3.2, 55% conductivity is much used as design basis for 6063·T6 alloys for tubes, hence coefficients should be taken from the column, headed 55%.


                                            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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