MT200 Ultrasonic Thickness GaugePrecision gauges use single-element transducers to provide the thinnest range and highest degree of accuracy possible.
Portable Hardness Testing Impact Devices
Portable Hardness Testing Impact Devices
There are 7 Types of portable hardness testing impact devices that are available for all mitech portable hardness testers and their special applications.
| Impact Device D | |
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Universal standard unit, for majority of hardness testing |
| Imapct Device DC | |
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Extrmely short impact device,spring loaded with a special stick. Used in very confined spaces, e.g. in holes,cylinders or for internal measurements on assembled machines. |
| Impact Devices C | |
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Reduced impact energe, appoximately 1/4 of D type. Applications: surface hardened components, coatings, thin walled or impact sensitive components (small measuring identation). |
| Impact Device D+15 | |
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Particularly slim front section and with measuring coil moved back; Hardness measurements on grooves and on recessed surfaces |
| Impact Device DL | |
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Needle front section, diameter 4.2 mm, length 50 mm, measurements on extremly confined spaces. |
| Imapct Device E | |
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Synthetic diamond test tip (approximately 5000 HV), For measurements on extremly high hardness range (always in excess of 50 HRC/ 650 HV), tool steels with high carbide content inclusions. For measurements up to 1200 HV. |
| Impact Device G | |
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Enlarged test tip, increased impact energy (approximately 9 times that of type D), low demands for measuring surface, for measurements in Brinell only (Max. 650 HB). Applications: solid components, e.g. heavy castings and forgings. |
Measuring range of impact devices
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Material
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Method
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Impact device
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D/DC
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D+15
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C
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G
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E
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DL
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Steel and Cast Steel
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HRC
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20～68.5
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19.3～67.9
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20.0～69.5
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22.4～70.7
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20.6～68.2
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HRB
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38.4～99.6
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47.7～99.9
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37.0～99.9
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HRA
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59.1～85.8
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61.7～88.0
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HB
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127～651
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80～638
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80～683
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90～646
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83～663
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81～646
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HV
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83～976
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80～937
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80～996
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84～1042
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80～950
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HS
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32.2～99.5
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33.3～99.3
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31.8～102.1
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35.8～102.6
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30.6～96.8
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Cold work
tool steel
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HRC
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20.4～67.1
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19.8～68.2
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20.7～68.2
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22.6～70.2
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HV
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80～898
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80～935
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100～941
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82～1009
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Stainless steel
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HRB
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46.5～101.7
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HB
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85～655
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HV
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85～802
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Grey Gast Iron
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HRC
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HB
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93～334
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92～326
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HV
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Nodular Cast Iron
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HRC
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HB
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131～387
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127～364
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HV
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Cast Aluminium alloys
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HB
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19～164
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23～210
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32～168
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HRB
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23.8～84.6
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22.7～85.0
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23.8～85.5
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BRASS
(copper-zinc alloys) |
HB
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40～173
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HRB
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13.5～95.3
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BRONZE
(Copper-Aluminium/Tin alloys) |
HB
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60～290
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Wrought copper alloys
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HB
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45～315
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Available type of impact device
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DC:
Test hole or hollow cylindrical |
D+15:
Test groove or reentrant surface
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C:
Test small, light, thin parts and surface of hardened layer |
G:
Test large, thick, heavy and rough surface steel |
E:
Test super high hardness material |
DL:
Test slender narrow groove or hole |
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Type of impact device
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DC(D)/DL
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D+15
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C
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G
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E
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Impacting energy
Mass of impact body
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11mJ
5.5g/7.2g
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11mJ
7.8g
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2.7mJ
3.0g
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90mJ
20.0g
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11mJ
5.5g
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Test tip hardness:
Dia. Test tip:
Material of test tip:
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1600HV
3mm
Tungsten carbide
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1600HV
3mm
Tungsten carbide
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1600HV
3mm
Tungsten carbide
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1600HV
5mm
Tungsten carbide
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5000HV
3mm
synthetic diamond
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Impact device diameter:
Impact device length:
Impact device weight:
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20mm
86(147)/ 75mm
50g |
20mm
162mm
80g
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20mm
141mm
75g
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30mm
254mm
250g
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20mm
155mm
80g
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Max. hardness of sample
|
940HV
|
940HV
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1000HV
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650HB
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1200HV
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Mean roughness value of sample surface Ra:
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1.6μm
|
1.6μm
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0.4μm
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6.3μm
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1.6μm
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Min. weight of sample:
Measure directly
Need support firmly
Need coupling tightly
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>5kg
2～5kg
0.05～2kg
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>5kg
2～5kg
0.05～2kg
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>1.5kg
0.5～1.5kg
0.02～0.5kg
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>15kg
5～15kg
0.5～5kg
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>5kg
2～5kg
0.05～2kg
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Min. thickness of sample Coupling tightly
Min. layer thickness for surface hardening
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5mm
≥0.8mm
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5mm
≥0.8mm
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1mm
≥0.2mm
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10mm
≥1.2mm
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5mm
≥0.8mm
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