This datasheet contains the complete technical specification of the CUPAL Elektro-Cupal-Blech 70/30 (soft) copper-aluminum bimetal composite material.
| Property | Value |
|---|
| Material type | Cold-roll-bonded composite (Verbundwerkstoff) |
| Composition | 70% Aluminum / 30% Copper |
| Supplier / distributor | WMH Westdeutscher Metall-Handel GmbH, Germany (Hungarian distributor: HIDRA-MIX Kft., Budapest) |
| Manufacturing process | Cold-roll-bonding (Kaltwalzplattieren) + diffusion welding |
| Property | Value | Unit |
|---|
| Density | 4.6 | g/cm³ |
| Electrical conductivity | 41.9 | m/(Ohm·mm²) |
| Specific electrical resistance | 0.0239 | Ohm·mm²/m |
| Thermal conductivity | 265 | W/(m·K) |
| Linear thermal expansion | 21.8 | 10⁻⁶/K |
| Property | Value | Unit |
|---|
| Modulus of elasticity (Young's modulus) | 81 | kN/mm² |
| Tensile strength | 130–180 | N/mm² |
| Bond strength (Haftfestigkeit) | 70–110 | N/cm band-width |
| Max. heat-treatment temperature | 260 | °C |
| Max. heat-treatment duration | 4 | hours |
| Side | Vickers hardness | Brinell hardness |
|---|
| Aluminum side | 30–40 HV 0.2 | 30–40 HB 2.5/62.5 |
| Copper side | 50–70 HV 0.2 | 50–70 HB 2.5/62.5 |
| Property | Value |
|---|
| Grade | AL 99.5 |
| Material number | 3.0255 (DIN 17007) |
| International designation | Alloy 1050A |
| Purity | min. 99.5% Al |
| Property | Value |
|---|
| Grade | E1-Cu58 |
| Material number | 2.0065 (DIN 1787) |
| French standard | CU/a1 (NFA 53-100) |
| Purity | Cu 99.9% |
| Material | Conductivity | Relative (vs Cu) | Density |
|---|
| Pure copper | ~58 m/(Ohm·mm²) | 1.00 | 8.96 g/cm³ |
| CUPAL 70/30 | 41.9 m/(Ohm·mm²) | 0.72 | 4.60 g/cm³ |
| Pure aluminum | ~36 m/(Ohm·mm²) | 0.62 | 2.70 g/cm³ |
Cross-section factors:
- Required cross-section vs. copper: 1.41×
- Required cross-section vs. aluminum: 0.906×
| Thickness | Dimensions | Approx. sheet weight |
|---|
| 0.5 mm | 500 × 2000 mm | ~2.25 kg |
| 1.0 mm | 500 × 2000 mm | ~4.40 kg |
| 1.5 mm | 500 × 2000 mm | ~6.70 kg |
| 2.0 mm | 500 × 2000 mm | ~9.00 kg |
| Type | Description |
|---|
| Walzblank | Mill-rolled finish (standard) |
| Blank | Polished, bright finish |
| Gebürstet | Directional brushed |
| Satiniert | Fine satin texture |
| EDT (isotropic) | Electrical-discharge textured, uniform, directionless |
- Standard: cut edges (Geschnittene Kanten, GK)
Full range of cold forming possible: bending, deep drawing, embossing, stretch forming, edge bending, profiling, beading, riveting, hemming.
- Soft-soldering: on the copper side with standard processes
- Plating: on the copper side with standard galvanic processes
- Bolted joints: primarily for electrical applications
- Maximum 260 °C temperature
- Maximum 4 hours duration
- Purpose: relieving work-hardening
- Exceeding the limit: uncontrolled intermetallic-layer growth
The material's own standards (not application-area standards):
| Component / aspect | Standard |
|---|
| Aluminum component (AL 99.5) | DIN 17007 / Werkstoff-Nr. 3.0255 |
| Copper component (E1-Cu58) | DIN 1787 / Werkstoff-Nr. 2.0065 |
| Supplier quality management | ISO 9001:2015 |
CUPAL transition elements are typically used in equipment built to DIN 43671, IEC 61439, IEC 61238 or IEC 62305 — but these are equipment standards, not CUPAL material standards. For details, see CUPAL material and application-area standards (DIN, IEC, MSZ EN).
- Worldwide delivery
- Small quantities orderable (Kleinstmengen)
- Custom cutting on request
- Store in a dry, well-ventilated environment
Questions about technical parameters? Request expert advice.
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