Luma Gold Plated Tungsten
Wire
Luma Gold Plated
Tungsten Wire
For some applications tungsten wire has to be plated to meet
special requirements. This may be for instance to protect the wire from
corrosion, to solder it to other metals or to reduce
the secondary emission of electrons.
Example of
Applications:
Printing
Medical
Connectors
Technical research
Antennas
Fuses
Properties of bare
Tungsten wire
Purity
99.95% W
Melting point 3410 °C
Density 19.17 g/cm3
Wire qualities:
Description
0.055 Ohm x mm2/m
821/60
Specific electrical resistance at 20 °C Type of strike: Gold
Modulus of elasticity
at 20 °C
410 kN/mm2 Treatment before plating: Etched
821/65 Treatment before plating: Etched
Type of strike: Gold
This quality is processed to meet demands for medical
use.
821/66
Treatment before plating: Ultra polished
Type of strike: Gold
821/67
Treatment before plating: Ultra polished
Type of strike: Nickel
Wire dimensions: 5 – 500 microns
Diameter tolerances: +/- 4% by weight as standard
Minimum +/- 1.5% available on request
Gold coat thickness: For wire dimensions below 50 microns, the coat thickness corresponds to 3 – 5% by weight as standard. For wire dimensions from 50 microns the coat thickness is 0.5 micron as standard. The coat thickness can be adjusted to meet your requirements
Examples of wire dimensions
with coat thickness as per Luma standard
2009.11
Wire dimension
(microns)
Wire dimension
(mils)
25
50
75
100
150
0.984
1.97
2.95
3.94
5.91
Au coat thickness
(microns)
0.25 +/- 0.07 0.5 +/- 0.1
0.5 +/- 0.1
0.5 +/- 0.1
0.5 +/- 0.1
Au coat by weight
(%)
3.0 - 5.0
3.0 - 5.0
2.2 - 3.2
1.6 - 2.4
1.0 - 1.6
LUMA-METALL AB, Kalmar, Sweden
Telephone +46-480 42 90 45
e-mail: sales@luma-metall.se
www.luma-metall.se
Certified in accordance
to ISO 9001:2008
Ovality (out of roundness): ø Microns Standard Available on request
< 15
≥ 15
Max 6%
Max 5%
Max 3%
Max 2%
Elongation: 95
/1
00
90
/1
00
80
/1
00
Straightness:
85
/1
00
1 – 3%
0
Straightness grade
4
3
2
1
ø Microns < 15
ø Microns ≥ 15
standard
on request
on request
not available
standard
on request
on request
(80/100)
(85/100)
(90/100)
(95/100) 50
100 (cm)
Tensile strength of Gold Plated Tungsten
Tensile strength: Tensile strength Gold Plated Tungsten
3900
Max
3700
Average
3500
Min
3300
N/mm2
3100
2900
2700
2500
2300
2100
1900
Micron
300 280 260 240 220200 180 160 140 120
100 190 170 150 130 110 90 70 50
30
80 70 60 50 40
30
80 70 60 50 40
30
60 50 40
0.30
0.68
1.20
1.88
2.71
3.69
4.82
1.20
2.71
4.82
7.53
10.84
2.71
4.90
7.60
10.84
14.76
19.28
2.71
4.82
7.53
10.84
14.76
19.28
2.71
7.53
14.76
24.40
36.45
50.90
67.77
87.05
108.73
30
43
59
77
98
120
146
173
204
236
1500
mg/200mm
271
1700
LUMA-METALL AB, Kalmar, Sweden
Telephone +46-480 42 90 45
30
20
40 35 30 25 20 15 10
e-mail: sales@luma-metall.se
www.luma-metall.se
Certified in accordance
to ISO 9001:2000