CUPAL Sheets
Copper-aluminium bimetal sheet in 0.5 / 1.0 / 1.5 / 2.0 mm thickness — 500 × 500 mm sheets from HUF 37,500 net; 500 × 2000 mm standard and custom cut with a 24 h quote.
In short
CUPAL sheet is a cold-rolled copper-aluminium bimetal composite — 70% aluminium, 30% copper, diffusion-bonded into one material — that prevents galvanic corrosion where copper and aluminium conductors meet. It is not an alloy, so each side keeps the conductivity and strength of its original metal.
- 0.5–2.0mm
- Thickness range
- 37,500Ft
- From net per 500 × 500 mm sheet
- 70/30
- Al / Cu ratio
- 41.9m/Ω·mm²
- Electrical conductivity
What is CUPAL sheet used for?
When connecting copper and aluminium conductors, direct contact causes galvanic corrosion. CUPAL sheet solves this: one side is copper, the other aluminium — no electrochemical reaction, no corrosion.
CUPAL sheet is a cold-rolled copper-aluminium bimetal composite: 70% aluminium, 30% copper, diffusion-bonded into a single material. It is not an alloy — both sides retain the properties of the original metal. Use it wherever aluminium and copper conductors meet and you want to prevent galvanic corrosion. German manufacturing technology, European standards.
List prices — 500 × 500 mm sheet (HUF, net)
| SKU | Thickness | Size | Weight | Availability | Net list price / sheet | Quantity (pcs) |
|---|---|---|---|---|---|---|
| TCUP05 | 0.5 mm | 500 × 500 mm | ~0.56 kg | In stock | 37,500 Ft~ €103.31 | |
| TCUP10 | 1.0 mm | 500 × 500 mm | ~1.10 kg | In stock | 60,000 Ft~ €165.30 | |
| TCUP15 | 1.5 mm | 500 × 500 mm | ~1.68 kg | Made to order, 5-10 days | 92,500 Ft~ €254.84 | |
| TCUP20 | 2.0 mm | 500 × 500 mm | ~2.25 kg | Made to order, 5-10 days | 125,000 Ft~ €344.38 |
TCUP05 / TCUP10 ship from stock; TCUP15 / TCUP20 are made to order with a 5–10 day lead time. Net prices, VAT not included.
Our list prices are published, net of VAT. An EN 10204 material certificate accompanies every shipment — 2.2 as standard, 3.1 on request — and we cut to size from your drawing.
Prices are net list prices. Gross = net × 1.27 (27 % Hungarian VAT applies to HU-issued invoices).Volume discounts apply (50+ pcs) — request a tailored quote.
Effective: 2025-02-01
Panel builders ask for bimetal sheet or Cu-Al bimetal, buyers coming from earthing and substation work ask for copper-clad aluminium sheet, and price lists label it CUPAL — all one product: a copper layer roll-bonded to aluminium across the whole sheet, so a bolted joint only ever puts like metal to like metal. Cut into transition plates, discs or strips, it does across a busbar joint what a CUPAL washer does under a single bolt.
Other formats — 500 × 2000 mm standard and custom cuts
| Thickness | Size | Weight / sheet | Pricing | Quantity (pcs) |
|---|---|---|---|---|
| 0.5 mm | 500 × 2000 mm | ~2.25 kg | 24 h quote | |
| 1.0 mm | 500 × 2000 mm | ~4.40 kg | 24 h quote | |
| 1.5 mm | 500 × 2000 mm | ~6.70 kg | 24 h quote | |
| 2.0 mm | 500 × 2000 mm | ~9.00 kg | 24 h quote |
500 × 2000 mm standard sheet and any other geometry on quote — we respond within 24 h.
Technical specifications
| Property | Value |
|---|---|
| Density | 4.6 g/cm3 |
| Electrical conductivity | 41.9 m/(Ohm*mm2) |
| Thermal conductivity | 265 W/(m*K) |
| Tensile strength | 130-180 N/mm2 |
| Composition (Al/Cu) | 70% Al (AL 99.5) / 30% Cu (E1-Cu58) |
| Bond strength | 70-110 N/cm |
Surface finishes
CUPAL sheet is available in multiple surface finishes:
- Walzblank (mill finish) — standard
- Blank (bright, mirror finish)
- Gebürstet (brushed, directional finish)
- Satiniert (satin, matt finish)
- EDT (electro-discharge texture, isotropic finish)
Material composition
Aluminium side: AL 99.5 (Werkstoff-Nr. 3.0255, 1050A). Copper side: E1-Cu58, Cu 99.9% (Werkstoff-Nr. 2.0065). Bond strength between the two metals: 70-110 N/cm.
Also available cut to custom size
Any shape — disc, rectangle, strip or a custom contour. Minimum order is one 500 × 500 mm sheet of base material.
Custom cutting from a DXF, PDF or JPG →Frequently asked questions about CUPAL sheet
Custom-cut to any shape — no one else offers this
Circles, strips, rectangles or fully bespoke contours — we cut any shape from CUPAL sheet. Send your drawing or describe the dimensions, and we respond within 1 business day.
Get a Quote Now