Thermobimetals are a special type of clad materials.

Thermobimetals are composite materials consisting of at least two components with different thermal expansion coefficients. These expand to different degrees when heated, causing the thermobimetal to bend. The greater the difference in thermal expansion between the two components, the greater the bend. Thermobimetals are used when temperature-dependent variables need to be regulated, controlled or limited.

The diverse product range offers grades with the highest thermal sensitivity, individually defined electrical resistance, very good corrosion resistance, and a high thermal application limit. In addition to thermobimetals standardized according to DIN 1715, numerous special thermobimetals are produced. Everything is geared towards your optimal solution. Through years of investment and technological measures at Auerhammer, even minimal dimensions can be manufactured with the highest quality.

During the cladding process, we combine at least two different metallic strips into a composite material. The individually prepared component strips run parallel from their respective coils together into the roll gap of the cladding stand. The rolling pressure creates a mechanical bond. Subsequent heat treatment then produces an inseparable contact surface.

Through subsequent rolling, annealing, and skin-pass steps, we optimally adapt the composite to customer requirements. This results in strips in work-hardened, soft-annealed, and temper-rolled conditions with a defined strength range.

Cleverly combined layers offer the following benefits:

• Improved or new properties depending on the materials used

• Individual composite structure

• Cost-effective tool manufacturing / design iterations

• Realisation of complex designs (channel structures)

Metal strips and metal foils made of special alloys are always used when requirements demand something extraordinary.

Nickel and nickel-based alloys, for example, possess magnetic properties, controlled thermal expansion, are temperature or corrosion resistant, or are used in corrosive media.

We produce a variety of high-performance alloys and can realize solutions for almost every customer requirement. Dimensions from 0.002 mm to 3 mm thickness can be manufactured in our rolling mills with tolerances of ± 0.001 mm. Furthermore, widths from 3 mm to 340 mm can be achieved.

We define precision metal foils as having thicknesses 
< 10 µm (= 0.01 mm).

Our thinnest metal foils are 0.002 mm (2 µm). A human hair is 0.04 mm thick. This means our precision metal foils are up to 20 times thinner than a human hair.

We manufacture precision metal foils for highly specialized applications to customer specifications. Small quantities from 100 g can be produced.

Materials available:

• Pure metals: nickel, copper, tantalum, titanium, niobium, …

• Nickel alloys: FeNi, NiCr, NiCrFe, NiCu, …

• Copper alloys: CuNi44Mn, …

• Soft magnetic alloys: FeNi36 … FeNi80

• Stainless steels: 1.4301, 1.4310, 1.4404, 1.4435, …

Other materials available on request.