NF A 51-050
  Assembly type definitions
  NF EN 13.602







NF EN 13.602

August 2002 (extrait)

Tolerances on wires.

NOMINAL ě (Dd) d (mm)

Tolerances (d)
              d 0,080
0,080 < d 0,250
0,250 < d 0,400
0,400 < d
             
▒ 2 Ám (*)
▒ 3 Ám
▒ 4 Ám
▒ 1 % of nominal diameter rounded to 1 Ám
 

 

 

Ovalisation on wires.

ě 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.mm▓.m-1)
 kr = coefficient for metallurgical state of copper :

  • kr = 1 for annealed copper wires
  • kr = 1,02 for hard drawn copper wires ě > 6 mm
  • kr = for hard drawn copper wires 1mm < ě < 6mm
  • kr = for hard drawn copper wires ě < 1 mm
  • ke =coefficient for surface influence on annealed tin plated copper wires :

(e = minimum tin thickness (free tin) in Ám, value shown by table 6. This value cant be less than 0,3Ám)
 


Tensil stress, elongation after break.

 

Hard drown copper

Nominal ě
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 ě
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 Ám (valeur indicative)
  • grade B : e = 0,6 Ám
  • grade C : e = non spÚcifiÚ

 

 

Annealed copper caractÚristiques

RÚsistivity : 1,7241 10-2 Ohms mm▓ m-1 (equivalent to  1/58 Ohms mm▓ m-1).
Variation temperature coefficient  for ohmique resistance with temperature is  : 0,00393

Volumique mass : 8,89 g/cm│ with a tolÚrance of  ▒ 0,5% for any calculation.

 

 

 

 

 

 

 

Top of Page
Home