Ultrasonic metal hardness tester - THU271

Reference: N/A

Choisissez votre modèle :

Duromètre portable UCI, VICKERS-ROCKWELL-BRINELL + sonde 10N, THU271

Sonde 10N pour duromètre UCI THU271

Sonde 50N pour duromètre UCI THU271

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The THU 271 ultrasonic hardness tester is a device designed to measure the hardness of metallic materials using the ultrasonic principle. It can be used to assess the hardness of common materials such as steel, cast steel, copper and aluminium alloys.

The device has three ‘user material’ profiles with a configuration wizard, enabling measurements to be carried out quickly on specific or new materials.

This feature considerably extends the scope of the hardness tester’s applications.

Key features of the THU271

Standard: GB/T 34205-2017
Method: ultrasonic contact impedance for measuring the hardness of metals
High-precision measurement over a wide range of materials
Dual display: Vickers (HV) and selectable secondary hardness scale
Special electronic design with hot plug support for probes, automatic recognition of applied force
Parallel conversion of conventional scales: HV, HB, HRA, HRB, HRC
Three customised material sets for easy testing of special materials
3.5″ IPS colour display, fully digital, responsive, with wide viewing angle
Multilingual display: Chinese / English, ergonomic menu
Adjustable screen brightness to suit the environment
USB interface for rapid data exchange and configuration via PC
Main unit compatible with multiple probes, automatic identification without recalibration
Software calibration function for measured values
Configurable automatic alarms for out-of-limit values, practical for serial testing
Compact, robust metal case, resistant to vibration, shock and electromagnetic interference
Measurement of special materials possible via user profiles
Battery indicator and charging process monitoring on screen
Stores up to 600 measurement series, including all relevant information (date, probe type, material, frequency, max/min/average values, etc.)
Rechargeable 3.7 V lithium-ion battery, autonomy ≥ 20 hours, power-saving functions

Typical THU-271 hardness tester applications by test force

Test force	Typical applications
98 N	Forgings, welds, thermal impact zones
50 N	Induction-hardened and case-hardened layers on machine tool parts (camshafts, turbines, welds, heat-affected zones)
20 N	Flanges, gears, stampings, moulds, crankshafts, turbine rotors
10 N	Ion nitrided layers and forgings for stamping dies
8 N	Precision parts, gearboxes, bearing rings
3 N	Coatings (copper, chrome), hardening of low-pressure cylinders (thickness ≥ 0.02-0.04 mm)
1 N	Thin coatings, polished surfaces

Additional feature

Measuring direction: perpendicular to the surface
Hardness scales: Vickers (HV), Brinell (HB), Rockwell B (HRB), Rockwell C (HRC), Rockwell A (HRA)
Display: Vickers + secondary scale
Materials: steel, cast steel, cast aluminium alloys, pure copper
User profiles: 3 types with configuration wizard
Display: 3.5-inch colour IPS, 480 × 320 resolution
Probe: automatic identification + manual adjustment, hot plug support
Storage: up to 600 measurement groups, 1 to 32 measurements per group
Power supply: 3.7 V lithium-ion battery
Autonomy: ≥ 20 hours
Recharge: 5 V / 1000 mA
Communication: USB 2.0
Dimensions: 159 × 83 × 39 mm (main unit), Ø 22 × 141 mm (probe)
Weight: 370 g (main unit), 210 g (probe)
Accuracy and repeatability: see Tables 2 and 3

Table 1 – Maximum permissible relative error (Erel / %)

Hardness of standard block	HV1	HV2	HV5	HV10	HV0.1	HV0.3	HV0.8
< 250 HV	±4 %	±4 %	±4 %	±4 %	±5 %	±5 %	±4 %
250 HV to 500 HV	±4 %	±4 %	±4 %	±4 %	±6 %	±6 %	±4 %
> 500 HV to 800 HV	±5 %	±4 %	±4 %	±5 %	±7 %	±7 %	±5 %
> 800 HV	±6 %	±4 %	±4 %	±4 %	±8 %	±8 %	±6 %