NDT Crack testing

non-destructively with ultrasound, magnetic particle testing, dye penetrant testing or eddy current testing. We will find the optimal testing method for your inspection task.
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Inspection methods for the nondestructive crack testing

The crack testing refers to various methods for the detection and assessment of cracks in materials and safety or consequential costs relevant components, e.g. pressure vessels, pipes and components of the automotive or aerospace industry.

We offer various procedures for testing your components:

For the detection of cracks close to the surface or open to the surface, the magnetic particle inspection , the dye penetration test / liquid penetrant test and the eddy current test are suitable.

For the detection of internal and external defects as well as discontinuities in sound-conducting materials (metals, plastics), ultrasonic testing is recommended. Generally ultrasonic testing is suitable for flat or rotationally symmetrical components (for example in pipes, bars, metal sheets, semi-finished products) as well as in welded seams (e.g. laser, electron beam, submerged, butt-welding). With the support of scanner systems, ultrasonic testing offers high-sensitivity detection and imaging representation of results.

The detection of cracks by means of radiographic examination / digital computed tomography is mainly used for volume inspection of geometrically more complex components with different wall thicknesses or for very thin components.

Depending on the thickness of the material, even fine cracks can be found.

We provide the ideal ndt crack testing solution for your specific application. Please contact us for more details


Eddy Current Testing (ET)

Eddy current testing is used to detect surface defects and near-surface defects in electrically conductive metals. For this purpose, electromagnetic currents are generated in the component. Since these currents swirl in a circle, the method is called eddy current testing. Defects in the material change the course of these eddy current lines, whereby defects are detected.

Ultrasonic testing (UT)

Ultrasound is the method of choice when it comes to 100% inspection for internal material defects, surface cracks and wall thickness measurement. Ultrasonic testing is based on the amplitude and time-of-flight measurement of sound waves. These are emitted by an ultrasonic probe and their reflections are received back. Defects in the material cause a change in the sound waves, allowing them to be detected and located by the inspector. Transit times determine the location of the defect, amplitudes the backscatter magnitude and thus a measure of the size of the defect. Requirement: Your material is sound-conductive, e.g. metals and plastics.

Magnetic particle testing (MT)

Magnetic particle inspection is used to detect surface defects and near-surface defects in ferromagnetic metals. This inspection method makes use of the laws of magnetization. Defects in the material cause changes in the magnetic flux and these are made visible by iron powder with contrasting color or fluorescent magnetic powder.

Dye penetrant testing (PT)

Dye penetrant testing is used to detect material defects open towards the surface in almost all materials. For this purpose, a penetrant is applied to the cleaned component surface. After a penetration time and subsequent intermediate cleaning, a developer is then applied. This draws the color still contained in the defects, such as cracks and pores, out again, making them visible.

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