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Residual stress, retained austenite, grinding burn and heat treat defect detectionStresstech Group provides equipment and solutions based on Barkhausen effect, X-ray diffraction and hole-drilling for studying - grinding burns,
- heat treat defects,
- hardness changes,
- residual stresses,
- retained austenite contents,
- etc.
or for controlling the quality of - grinding,
- heat treating,
- shot peening or
- machining of
camshafts, crankshafts, ball bearings, gears, valves, etc. 
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stresstech.fi