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  CuZn23Al3Co   ( CW703R )

    Grade :     CuZn23Al3Co
    Number:     CW703R
    Standard: EN 1654 : 1998   Copper and copper alloys. Strip for springs and connectors
    Classification:     Cupper alloy
    Density     8.2 g/cm ³
    Equivalent grades:     No information



Chemical composition %   of grade   CuZn23Al3Co   ( CW703R )
Fe Ni CoAl Cu PbSn Others -
max   0.05max   0.30.25 - 0.553 - 3.872 - 75max   0.05max   0.1 total 0.1 Zn - remainder


Mechanical properties of grade   CuZn23Al3Co   ( CW703R )

Rm - Tensile strength (MPa) (R660)660-750
Rm - Tensile strength (MPa) (R740)740-830


Rp0.2 0.2% proof strength (MPa) (R660)580
Rp0.2 0.2% proof strength (MPa) (R740)660


A - Min. elongation Lo = 50mm (%) (R660) 8-10
A - Min. elongation Lo = 50mm (%) (R740) 3


  Vickers hardness  ( HV):   (H190) (R660)190 - 220
  Vickers hardness  ( HV):   (H210) (R740)210 - 240


Properties CuZn23Al3Co
Modulus of elasticity = 115 kN/mm ²
Electrical conductivity = 10 MS/m;
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Casting process
GS Sand casting
GM Permanent mould casting
GZ Centrifugal casting
GC Continuous casting
GP Pressure die casting


Material conditions
R Material condition designated by the minimum value of tensile strength requirement for the product with mandatory tensile strength and elongation requirements
H Material condition designated by the minimum value of hardness requirement for the product with mandatory hardness requirements


Mechanical properties
Mechanische Eigenschaften
Caracteristiques mecaniques
ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d�elasticite minimale
Rm Tensile strength / Zugfestigkeit / Resistance a la traction
A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc

Chemical composition of   CuZn23Al3Co   ( CW703R ). Equivalent grades of   CuZn23Al3Co   ( CW703R ).
Standards of   CuZn23Al3Co   ( CW703R ). Properties of   CuZn23Al3Co   ( CW703R ). Hardness of   CuZn23Al3Co   ( CW703R ).

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