Material Tests

We carry out various material tests of vacuum components at VACOM to ensure optimal quality properties. With our know-how and our modern equipment we are able to offer these tests as service at an excellent price-performance ratio.

Our material tests include:

Analysis of the Material Composition

Analysis of the material compositionThe material composition is an essential parameter for processing of metallic materials and a significant criterion for quality and durability in the application. The analysis of metallic materials is part of our range of services.

By means of a metal analyser based on arc and spark excitation it is possible to determine all necessary elements of metallic materials – incl. traces of carbon, phosphor, sulphur and nitrogen. Predefined calibration modules are available for alloys like Fe, Al, Cu, Ni, Co, Ti, Mg, Zn, Sn and Pb. They comprise the relevant range of elements and individually adjustable. Presently, we use calibration moduls for austenitic steel, aluminium, copper and their alloys.

Measurement of Hardness

Measurement of hardnessThe knowledge of the hardness of a material is often of crucial importance. The hardness, strength and the yield strength of high-alloy stainless steels e. g. are especially low in quenched condition. The manufacturing process can also have significant impact on the hardness at other materials what affects e. g. copper. Hence the components fulfil their task in your application it is important to check the hardness of the material.

With our mobile hardness test device we can also measure and immediately analyse the Vickers hardness on-site at your premises. The hardness measurement according to Vickers specifies the ingression of an equilateral diamond pyramid with an aperture angle of 136° with a defined test load into the work piece. The indentation surface is calculated from the diagonal length of the remaining indentation measured by a measuring microscope. The Vickers hardness number (VHN) is the result of the ratio between the test load (unit newton = N) and the indentation surface (d in mm) multiplied with the factor 0,1891.

Determination of the Permeability of Paramagnetic Materials

The magnetic permeability µ characterises the permeability or magnetic conductivity of materials. It is the product of the magnetic field strength µ0 und the relative permeability µr, which we can determine for paramagnetic materials (µr = 1...2).
The relative permeability of vacuum is 1.
Materials can be classified into 3 groups with regard to their relative permeability:

  • Diamagnetic materials     0 ≤ µr < 1
  • Paramagnetic materials     µr > 1
  • Ferromagnetic materials     µr >> 1

The flux-gate magnetometer covers the measuring range from µr = 1.001 to 1.999. The results are displayed with a resolution of 0.001. The measurements can be executed at our place or on-site at your premises.

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