August 2002 (extrait)
Tolerances on wires.
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NOMINAL Ø (Dd) d (mm)
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Tolerances ( d) |
d ≤ 0,080
0,080 < d ≤ 0,250
0,250 < d ≤ 0,400
0,400 < d |
± 2 µm (*)
± 3 µm
± 4 µm
± 1 % of nominal diameter rounded to 1 µm |
Ovalisation on wires.
Ø
Nominal
d (mm) |
MAXIMUM VALUE FOR
d max - d min (mm) |
| d > 0,050 |
twice the absolute value of the tolerance
for the same single wire diameter |
Note : There is no value for diameter under 0.050 mm , because they
are not subject to a direct mesure.
Electrical charactéristics.
Maximum values for resistances are calculated as shown under:
n = number of wire of the lock
d = diameter nominal value, (en mm).
Δd = tolerance maximum value as shown in table 1 (en mm).
ρ20 = annealed copper resistivity at 20°C (en W.mm².m-1)
kr = coefficient
for metallurgical state of copper :
- kr = 1 for annealed copper
wires
- kr = 1,02 for hard drawn copper
wires Ø > 6 mm
- kr = for hard drawn copper
wires 1mm < Ø < 6mm
- kr = for hard drawn copper
wires Ø < 1 mm
- ke =coefficient for surface
influence on annealed tin plated copper wires :
(e = minimum tin thickness (free tin) in µm, value shown by table
6. This value cant be less than 0,3µm)
Tensil stress, elongation after break.
Hard drown copper
Nominal Ø
d (mm) |
Minimal stensile stress
MPa |
0,160 < d
≤ 1,120
1,120 < d ≤ 1,500
1,500 < d ≤ 2,000
2,000 < d ≤ 2,400
2,400 < d ≤ 3,000
3,000 < d ≤ 3,550
3,550 < d ≤ 4,000
4,000 < d ≤ 4,500
4,500 < d ≤ 5,000 |
460
440
430
420
400
390
380
370
360 |
Annealed wires
Nominal Ø
d (mm) |
Minimal elongation after tensil
break (%)
Bare wires
Tin plated wires
Single wire multi wires
Single wire multi wires |
0,040 < d
≤ 0,080
0,080 < d ≤
0,160
0,160 < d ≤ 0,320
0,320 < d ≤ 0,500
0,500 < d ≤
1,000
1,000 < d ≤
1,500
1,500 < d ≤
3,000
3,000 < d ≤
5,000 |
10
8
7
5
15
13
13
11
21
19
19
17
22
20
20
18
24
22
22
20
26
24
24
22
28
26
26
33
31 |
Coating thickness
The minimal thickness of pure tin depend on grade :
- grade A : e = 0,3 µm (valeur
indicative)
- grade B : e = 0,6 µm
- grade C : e = non spécifié
Annealed copper caractéristiques
Résistivity : 1,7241 10-2 Ohms mm² m-1 (equivalent
to
1/58 Ohms mm² m-1).
Variation temperature coefficient for ohmique resistance with temperature
is
: 0,00393
Volumique mass : 8,89
g/cm³ with a tolérance of ± 0,5% for any calculation.
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