Wieland-B44. Leaded phosphor bronze Extruded/drawn products. Chemical
composition*. Material designation. Sn. 4%. EN. CuSn4Pb4Zn4. Zn. 4%.
CW456K.
Wieland-B44 Leaded phosphor bronze Extruded/drawn products Wieland-B44 is a multi-alloy phosphor Wielandbronze containing 4 % tin, 4 % zinc and 4% lead. This makes it possible to achieve high mechanical strength and good spring properties. Wieland-B44 exhibits excellent wear and corrosion resistance. It has good cold working and excellent machining properties. Special applications are spring contacts for the electronic industry as well as slide bearings and valve components. In the size range between 2 and 4 mm very high mechanical strength can be achieved.
Chemical composition*
Physical properties*
Fabrication properties
Sn Zn Pb
W/(m*K)
86.5
Thermal expansion -6 coefficient (0-300°C) 10 /K
17.3
Modulus of elasticity
GPa
* Reference values at room temperature 1 GPa = 1 kN/mm² 1 MS/m = 1 m/Ω • mm²
CuSn4Pb4Zn4 CW456K C54400 not standardized not standardized not standardized
UNS DIN* BS* NF*
* Former national standards
12 21
g/cm³
EN
* Reference values in % by weight
MS/m % IACS
Density
4% 4% 4% 0.2% balance
P Cu
Electrical conductivity
Thermal conductivity
Material designation
8.9
103
Corrosion resistance*
Forming Machinability (CuZn39Pb3 = 100 %) Capacity for being cold worked Capacity for being hot worked Joining Resistance welding Inert gas shielded arc welding Hard soldering Soft soldering
80%
good poor fair fair fait excellent
Surface treatment Polishing
Product standards
mechanical electrolytic
good good good
Electroplating Heat treatment Melting range Soft annealing Thermal stress-relieving
In general excellent resistance to XXX corrosion in seawater, industrial atmosphere and to stress corrosion cracking.
Rod
EN 12164
930 - 1000 °C 500 - 650°C, 1-3 h 200 - 250°C, 1-3 h
Mechanical properties (values can be achieved and are a function of size and form) Reference values Rm [MPa]
from (soft/extruded) 300
to (hard) 850
Rp0.2
[MPa]
190
760
A5 HB
[%]
30 100
6 150
Forms and sizes available
EN designation Brief designation Number Wieland CuSn4Pb4Zn4 B44 CW456K Round tubes
Outside diameter from to
Drawn sections Extruded sections Sectional tubes Round and polygonal rods Round wires Polygonal wires
Wall thickness from to
Circumscribing diameter from to
Diameter / width across flats
from
to
2 2 2
20
All values in mm
Wieland-Werke AG 89070 Ulm Germany Telephone: Telefax:
[email protected] www.wieland.de
+49 (0) 731 944 - 0 +49 (0) 731 944 - 28 79
This leaflet is for your general information only and is not subject to revision. No claims can be derived from it unless there is evidence of intent or gross negligence. The data given are no warranty that the product is of a specified quality and they cannot replace expert advice or the customer's own tests.
0605 ZMT/Wi
Wieland - B44
Material
