larcore® aluminium honeycomb panels – lightweight, extremely rigid and versatile
larcore® aluminium honeycomb panels from W. Hartmann & Co. combine exceptional rigidity with extremely low weight. The innovative sandwich construction with an aluminium honeycomb core provides maximum stability with minimal material usage. As a result, the panels are not only extremely strong, but also corrosion-resistant, non-combustible (A2) and fully recyclable. Whether for high-quality interior fit-outs, vehicle and ship interiors or architectural applications – larcore® aluminium honeycomb panels from W. Hartmann & Co. offer the ideal combination of technical performance, large-format panels and sustainability.
Stock range
Choose from the various options to see which combinations are available. The selection options automatically adjust to the available combinations.
Key: BS* = both sides coated
larcore® – your benefits at a glance
Lightweight & rigid
Maximum stability with minimum weight thanks to the innovative aluminium honeycomb core – ideal for lightweight construction applications.
Versatile processing
Sawing, milling, drilling or bonding – larcore® can be processed easily and precisely using standard metalworking tools.
Corrosion & weather resistant
High-quality aluminium alloys provide protection against corrosion and ensure long-lasting durability, both indoors and outdoors.
Fire safety compliant
Non-combustible (A2), making larcore® suitable for safe applications in vehicle construction, ship interiors and interior fit-outs.
Sustainable & recyclable
Made entirely from aluminium, fully recyclable and environmentally friendly – combining performance with sustainability.
Large panels & high precision
Available in large panel formats with excellent dimensional stability – perfect for architectural and industrial projects.
Product details
The visible aluminium skin is available in different alloys, thicknesses and surface finishes – mill finish, primed or coil-coated. On request, the surfaces can also be finished with decorative coatings, laminates or veneers to meet specific design requirements in interior applications.
larcore® consists of two aluminium skins and a high-strength, hexagonal aluminium honeycomb core. The core provides exceptional rigidity while keeping the weight to a minimum. The layers are bonded together in a continuous production process and pressed into a homogeneous, dimensionally stable panel. All components of the composite are made from aluminium, thereby meeting the highest requirements for:
- recyclability
- easy processing
- fire safety regulations
The standard alloy for the aluminium skins is high-quality, strong and seawater-resistant EN AW 5754 (AlMg3). Lower-alloyed EN AW 5005 (AlMg1) is available on request. The honeycomb core is manufactured from corrosion-resistant EN AW 3003 (AlMn1Cu) alloy.
larcore® aluminium honeycomb panels can be sawn, milled, drilled or bent using standard metalworking tools. They are also suitable for bonded and mechanical fastening. Thanks to their dimensional stability and precision, they are ideal for industrial lightweight construction and demanding architectural applications. Users who are not yet familiar with processing larcore® are welcome to contact us for advice and support.
larcore® aluminium sandwich panels offer an exceptional combination of strength, low weight and processing versatility – ideal for applications where energy efficiency, robustness, large formats and durability are essential. Typical areas of application include shipbuilding and rail transport, vehicle construction and high-quality interior fit-outs. Thanks to their resistance to changing climatic conditions and their full recyclability, larcore® panels are also an excellent choice for demanding architectural projects – both indoors and outdoors. The full potential of larcore® becomes particularly apparent as part of a complete system: combined with suitable substructures, fastening elements and other Hartmann products such as sheets and profiles, lightweight, stable and cost-effective solutions can be created for a wide range of applications.
| Total thickness b mm |
5,5 | 6 |
10 |
15 |
20 |
25 |
30 |
40 |
|---|---|---|---|---|---|---|---|---|
| Cell size c |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
3/8'' / 9,52 mm |
| Cover sheet thickness e1 mm |
0,5 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| Reverse sheet thickness e2 mm |
0,5 |
0,5 |
0,5 |
1 |
1 |
1 |
1 |
1 |
| Alloy (temper H48) |
5754 |
5754 |
5754 |
5754 |
5754 |
5754 |
5754 |
5754 |
| Weight kg/m² |
3,62 |
4,97 |
5,19 |
6,78 |
7,05 |
7,32 |
7,59 |
8,13 |
| Moment of inertia* l cm4 |
0,63 |
0,79 |
3,16 |
9,99 |
18,06 |
28,81 |
49,6 |
83,51 |
| Rigidity* El kNcm² |
4390 |
5519 |
22169 |
69964 |
126466 |
201716 |
347169 |
584560 |
| Section modulus* w cm³ |
2,28 | 2,63 |
4,92 |
13,32 |
18,06 |
23,05 |
33,06 |
41,75 |
| Noise reduction Rw dB |
18,75 |
19 |
20 |
21,25 |
22,5 |
23,75 |
25 |
27,5 |
| Acoustic insulation Ra dBA |
19,5 |
19,6 |
20,3 |
21,18 |
22,16 |
23,21 |
24,3 |
26,15 |
| Thermal resistance R m²K/W |
0,006 |
0,0063 |
0,0074 |
0,0084 |
0,0089 |
0,0093 |
0,0099 |
0,011 |
* average value in the transverse axis
| Alloy |
3005 |
|---|---|
| Core metal thickness |
70 µm, deviating on request |
| Compressive strength |
2,00 MPa |
| Density |
54 kg / m² |
| Protective primer |
Yes |
| Coating top side e1 |
Primer 5+/-2 µm, PVC protective film 80 µm |
|---|