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Alloys and their Properties |
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Alloy |
6063 (AlMg0.7Si) (Old designation HE9) |
| General properties |
All purpose alloy combining low to medium strength properties with good finishing properties, readily accepting anodising and powder coating. |
| Uses |
Interior fittings, architectural and glazing sections, heatsinks, etc . |
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| 6063 Mechanical Properties |
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Temper (old designation) |
UTS
Nmm -2 |
0.2% Proof Stress
Nmm -2 |
Coefficient.of Linear Exp.
10 -6 /° C |
T4 (TB) |
130 |
65 |
24 |
T5 (TE) |
160 |
110 |
- |
T6 (TF) |
195 |
160 |
23.5 |
|
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Alloy |
6005A (AlSiMg (A)) |
| General properties |
Higher strength properties than 6063 with good powder coating properties. Suitable for anodising as a protective coating only. |
| Uses |
Light structural applications |
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| 6005A Mechanical Properties |
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Temper (old designation) |
UTS
Nmm -2 |
0.2% Proof Stress
Nmm -2 |
Coefficient.of Linear Exp.
10 -6 /° C |
T4 (TB) |
180 |
90 |
- |
T5 (TE)* |
230 * |
170 * |
- |
T6 (TF) |
250 |
200 |
- |
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*Approximate values only. 6005a T5 does not appear in BS EN 755-2: 1997 |
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Alloy |
6082 (AlSi 1.0MgMn) (Old Designation HE30) |
| General properties |
High strength alloy. Suitable for powder coating and anodising as a protective coating only. |
| Uses |
Structural sections, scaffolding, road signs, lorry trailers. |
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| 6082 Mechanical Properties |
| |
Temper (old designation) |
UTS
Nmm -2 |
0.2% Proof Stress
Nmm -2 |
Coefficient.of Linear Exp.
10 -6 /° C |
T4 (TB) |
205 |
110 |
23 |
T5 (TE) |
270 |
230 |
23 |
T6 (TF) |
310 |
260 |
23 |
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| Weight |
Lightness is the most outstanding and best-known characteristic of aluminium. The metal has an atomic weight of 26.98 and a density that is approximately a third of the corresponding value of steel. The addition of other metals alloying elements increases the strength without affecting the density, most commercial aluminium alloys have densities between 2.65 and 2.75 kg/dm 3 . The value that we use for mass and weight calculations is 2.71 kg/dm 3 (g/cm 3 ). |
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| Strength |
| Aluminium alloys have a tensile strength of between 70 and 700 N/mm, depending on the constituent elements, which can be tailored to requirement. In contrast to most steels, this strength increases at low temperatures, without any embrittlement. The strength is highest at absolute zero, and decreases with the increasing temperature. This increase in strength varies with the alloy designation, as shown below in table 3.3.04. |
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| Linear Expansion |
Aluminium has a relatively large co-efficient of linear expansion (around 25 x 10 -6 /° C), due to its high thermal conductivity. It may be necessary to take this into account in some fabrications. |
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| Electrical/Thermal Conductivity |
| The high electrical conductivity of aluminium makes it an ideal replacement for copper wiring and cable. A copper cable with a comparable conductive capacity will weigh nearly twice as much as an aluminium cable. Hence, aluminium is often used for overhead power cables. |
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| Tensile Strength And Hardness Properties Chart |
|
Tensile Strength
|
"F" Value
|
Vickers Number
|
Webster Number
|
6063
Alloy
|
6082
Alloy
|
|
300
|
30
|
105
|
16
|
|
T6
|
|
290
|
29
|
99
|
|
|
T5
|
|
280
|
28
|
96
|
|
|
270
|
27
|
92
|
15
|
|
T4
|
|
260
|
26
|
88
|
|
|
250
|
25
|
84
|
|
|
14
|
|
240
|
24
|
81
|
| |
|
230
|
23
|
77
|
13
|
|
220
|
22
|
73
|
|
|
12
|
T6
|
|
210
|
21
|
69
|
| |
|
200
|
20
|
65
|
11
|
|
190
|
19
|
62
|
|
T5
|
|
10
|
|
|
180
|
18
|
58
|
|
9
|
|
170
|
17
|
54
|
|
8
|
|
160
|
16
|
50
|
|
6
|
|
150
|
15
|
46
|
|
4
|
T4
|
|
140
|
14
|
42
|
| |
|
130
|
13
|
38
|
3
|
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Copyright 2004 
