Product Information
CUPAL is a cold roll plated composite material between aluminium as a carrier material and copper as the super imposed material. This Composite material is used in the electronic industry as a contact or rather as a transition material between conductors of copper and aluminium.
Because of this contact of CUPAL the contact resistance is dislocated between those different metals right into the plated connection. Consequently the contact is protected of atmospheric influences.
- High Quality
- Corrosion Resistance
- Good Thermal Conductivity
- Easy Deformability
CUPAL can be manufactured by the following dealings, because of ist microscopally thinness urged by cold moulding e.g.:
Folding, capsizing, stamping, drawing profiles, distortion.
In case of too strong increase of mechanical property because of a cold transformation, it is possible to adjust the first ability of recast by taking up a heat treatment. This heat treatment should not overstep 260 C/4h.
Manufacturing Proceeding
- The composite material CUPAL is produced by cold roll plating.
- After making a primary treatment of surface, harmonized with the respective materials which are used, aluminium an copper are close connected by high pressure in a roll plating scaffold.
- That evokes a consolidation of the material, which must be reducted by an appropriate heating treatment to reach the wished quality of the product.
- Herby the adhesive strength is improved between aluminium and copper by making use of a diffusion welding.
- An uncontrollable formation of an alloy layer can be avoided if the glow time and the red heat is limited.
Techniques of Application:
- Switch gears and apparatus construction: Utilization as addition and loop-tip terminal.
- Overhead construction: Wrap or hullformed inlay in clamp contacts.
- Advantages of CUPAL: Because of the low specific gravity it follows the advantages of accelerated masses e.g. for switchkeys. To reach a conductivity adequate to the copper only thin with copper super imposed layers are necessary, because of the skin effect, produced by high frequent current. So CUPAL is applied in condensers and construction parts in transmitter and receiver constructions.
Delivery Program of CUPAL
Elektro-Cupal-sheet 70/30 (70% AL, 30% CU), soft
Mechanical Characteristics, Bearing Surface Thickness:
Surface hardness:
- AL 30-40 HV 0,2 bzw. 30-40 HB 2,5/62,5
- CU 50-70 HV 0,2 bzw. 50-70 HB 2,5/62,5
Mechanical and Physical Properties
AL-CU
Density
g/cm3
4,6
Specific Electrical Conductivity
m/(Ohm*mm2)
41,9
Specific Electrical Resistance
Ohm*mm2/m
0,0239
Required cross section towards Cu
1,41
Required cross section towards Al
0,906
Thermal Conductivity
W/(m+K)
265
Lin. Thermal Expansion Coefficient
21,8
Modulus of Elasticity
kN/mm2
81
Tensile Strenght
N/mm2
130-180
Chemical composition of the elements of CUPAL:
Aluminium
AL 99,5
Material Number. 3.0255 according to DIN 17007
Alloy 1050A according to Int.Reg.Record
Copper
E1-Cu58
Material Number. 2.0065 after DIN 1787
CU / a1 according to NFA 53-100
CU 99.9%
Types:
Oberflächenhärte:
- Product Forms: Sheets
- Edge Forms: Cutted edge (GK)
- Surface type: Millfinish, bright, brushed, satined, isotropic (EDT)
