1. No category

Wieland-L49
Rolled Products
CuNi9Sn2
C72500
Material Designation
Chemical Composition (Reference)
Typical Applications
EN
CuNi9Sn2
Ni
9%
UNS*
C72500
· Relay springs
·Connectors
Sn
2%
* Unified Numbering System (USA)
Cu
balance
Physical Properties*
Fabrication Properties
Corrosion Resistance
Wieland-L49 has good corrosion
resistance in industrial atmosphere
and resists very well to tarnishing
even at prolonged storage. It also
exhibits good resistance to different
waters, humidity, non oxidizing acids,
alkaline and saline solutions, organic
acids, and dry gases. It is insensitive
to stress corrosion cracking.
Electrical
Conductivity
MS/m
%IACS
6.4
11
Capacity for Being
Cold Worked
excellent
Thermal Conductivity W/(m·K)
48
Machinability
less suitable
Capacity for Being
Electroplated
excellent
Capacity for Being
Hot-Dip Tinned
excellent
Soft Soldering
excellent
Resistance
Welding
good
Gas Shielded
Arc Welding
excellent
Laser Welding
good
Coefficient
of Electrical
Resistance**
10-3/K
0.6
Coefficient of
Thermal Expansion** 10-6/K
17.6
Density
8.89
g/cm3
Modulus of Elasticity GPa
Specific Heat
140
0.370
J/(g·K)
Poisson’s Ratio
0.34
* Reference values at room temperature
** Between 0 and 300 °C
Mechanical Properties
L49
R340
R380
Tensile Strength Rm
MPa
340–410
380–470
8 R450
Yield Strength Rp0.2
MPa
≤ 250
≥ 200
Elongation A50mm
%
≥ 30
≥ 10
El. Conductivity (MS/m)
Temper
450–530
7 ≥ 370
≥6
R500
R560
R610
500–580
560–650
≥ 610
≥ 450
≥ 520
≥ 580
≥3
≥2
–
H180
H190
Intermediate tempers are feasible. Higher elongation values can be obtained6by additional heat treatments.
Temper
H075
H110
Hardness HV
75–110
110–150
El. Conductivity (MS/m)
8
7
6
5
R340
H075
R380
H110
R450
H140
R500
H160
Temper
0°
L49
12
R500 R560
180–210
H160
Temper
R610
≥ 190 H190
H180
Bendability (Strip Thickness t ≤L49
0.5 mm)
L49
R560
H180
R610
H190
Rel. Bending Radius r/t 90°
Electrical Conductivity
H160
5 H140
R340 R380 R450
140–170
H075 H110160–190
H140
12
10
8
6
bending edge –I rolling direction
bending edge II rolling direction
4
2
0
R340
H075
R380
H110
R450
H140
R500
H160
Temper
R560
H180
R610
H190
Wieland-L49
CuNi9Sn2
C72500
190
180
170
160
150
140
130
120
110
100
90
80
L49
Vickers Hardness HV
Vickers Hardness HV
Resistance
L49 to Softening
Temper R450
400 °C
500 °C
600 °C
0
10
20
30
40
Time (min)
50
Vickers hardness
after heat treatment
(typical values)
190
180
170
160
150
140
130
120
110
100
90
80
60
Temper R500
400 °C
500 °C
600 °C
0
10
20
30
40
Time (min)
50
60
L49
Thermal Stress Relaxation
Stress remaining after thermal relaxation as a function of Larson-Miller
parameter (F. R. Larson, J. Miller, Trans
ASME74 (1952) 765–775) given by:
P = (20 + log(t))*(T + 273)*0.001.
Time t in hours, temperature T in °C.
Example: P = 9 is equivalent to
1.000 h/118 °C.
Measured on stress relief annealed
specimens parallel to rolling direction.
Total stress relaxation depends on
the applied stress level. Furthermore,
it is increased to some extent by cold
deformation.
100
Residual Stress (%)
90
80
70
60
50
40
Temper
R380, R450, R500,
R560, R610
7.0
8.0
9.0
10.0
Larson-Miller parameter P
11.0
Fatigue Strength
The fatigue strength is defined as the maximum bending stress amplitude which a material withstands for 107 load cycles
under symmetrical alternate load without breaking. It is dependent on the temper tested and is about 1/3 of the tensile
strength Rm.
· Standard coils with outside
diameters up to 1400 mm
· Traverse-wound coils with drum weights up to 1.5 t
Wieland-Werke AG
Dimensions Available
· Multicoil up to 5 t
· Hot-dip tinned strip
· Contour-milled strip
· Sheet
www.wieland.com
Graf-Arco-Str. 36, 89079 Ulm, Germany, Phone +49 731 944 2030, Fax +49 731 944 4257, info@wieland.de
This printed matter is not subject to revision. No claims can be derived from it unless there is evidence of intent or gross negligence.
The product characteristics are not guaranteed and do not replace our experts’ advice.
· Strip thickness from 0.10 mm,
thinner gauges on request
· Strip width from 3 mm,
however min. 10 x strip thickness
10/14 Bm (R+G)
Types and Formats Available