Hardness Tests  Manufacturers, Traders, Suppliers

The INNOVATEST IN-MET-U1A hardness tester differs significantly from traditional hardness testers. Instead of measuring a test impression (Vickers / Brinell) by means of an optical measuring system or a depth difference measurement (Rockwell), this method uses a completely different physical principle. A synthetic diamond in the form of a Vickers penetrator is applied to a rod. This test probe is set into resonance (approx. 80,000 Hz). The test force is applied by pressing the probe against the test piece. A high-precision, preloaded spring ensures that the defined test force is precisely maintained. The damping of the probe (measured frequency change) is influenced by the size of the contact area between diamond and sample. Together with the defined test load, the hardness of the material can be determined very precisely. The modulus of elasticity of the test piece influences the change in frequency and leads to different hardness values. In the case of carbon steels or low-alloy steels this influence can be neglected. Here, calibration can be performed with a normal hardness comparison plate. For other materials, the device must be calibrated for the respective material type. The IN-HV450 device is very easy to use. The operation does not require any special knowledge in hardness testing. The hardness value can be displayed in all common scales (HV, HB, HR, Shore). You can switch between these by simply pressing a button. The current measured value and scale is constantly shown on the large display. To perform a hardness test, the test probe is pressed against the test piece and held there for a few seconds. Immediately after completion of the measurement, the hardness value is displayed according to the selected hardness scale. Calibration can be easily performed by the user within a short time. The test procedure is carried out on a hardness comparison plate where the hardness is exactly known. As soon as the device has completed the measurement, the value specified on the hardness comparison plate is entered for this measurement (the calibration value). Individual test situations can be realized by storing several calibrations: From standard hardness testing to special applications such as weld seam testing or even mix-up tests on incoming goods. Due to this degree of freedom in calibration, measured values can also be calibrated which are outside the usual procedures. The device is well suited for testing and quality control within a production control. It is light and portable and can be operated with rechargeable batteries and charger.

Measuring principle according to the UCI method (Ultrasonic Contact Impedance Principle - Resonance Contact Damping Principle) Measuring range Rockwell C scale HRC 20-70 Brinell scale HB 75-650 Vickers scale HV 75-1000 Shorell scale HSD 23-102 Tensile strength Rm MPa 378-1736 Repeatability Rockwell C scale HRC 1.5 Brinell scale HB 10 Vickers scale HV 12 Shorell scale HSD 2 Tensile strength Rm MPa 5% Features: - Processing of the measured values - calculation of the mean value - selection-based deletion of a measured value (incorrect measurements) - PC - data connection to a PC USB interface - own software - display illumination - display characteristics hardness scale - measured hardness value - number of measurements - operating mode - archiving number - battery charge status - auto switch-off after 150 seconds - memory 100 measurements - memory resistant even when the device is switched off Operating time of the battery without illumination: 16 h with illumination 8 h with charger unlimited Charging time up to 100 % 8 hours Surface roughness < 2.5 Ra (for exact measurement values convex / concave shapes > 5 mm R Minimum sample weight > 0.01 kg material thickness sample without support > 2 mm samples with - positioning aids: > 1 mm depth of indentation Average 0.03 mm test probe life + 200,000 measurements Test load 15.7 N Power supply Charger : AC 100 - 240 V / 50 - 60 Hz Battery : 1.2 V Power consumption : < 3rd generation0 VA Application range Temperature - 20 ... + 55 ° C Transport and storage at - 35 ... + 60 ° C max. air humidity max. 30 ... 80 % Instrument dimensions over all Instrument : 180 x 80 x 42.4 Probe : 160 x 25 Weight 0.650 kg

UCI hardness tester Ultrasonic Contact Impedance A Vickers test pyramid 136° made of synthetic diamond is applied to the test probe. The probe is put into resonance. The indenter is pressed into the material to be tested with a defined spring force. Depending on the hardness, this results in a more or less large penetration depth, which in turn determines the size of the contact surface of the pyramid surfaces. The larger this contact area, the stronger the resonance damping. This can be evaluated very accurately and directly converted into Vickers hardness values or other hardness scales / tensile strength Rm. The device is calibrated to the material to be tested and is used for comparative measurement. The measuring accuracy is dependent on the modulus of elasticity. If, for example, an austenitic steel is tested with a calibration for carbon steel that is not associated with it, there will be a deviation that corresponds to the difference in the modulus of elasticity (carbon steel approx. 210,000 MPa / austenitic steel approx. 195,000 MPa) = approx. 7 %. The workpiece must not absorb the resonance (workpiece weight)