Products

The Impact Device of Hardness Tester

2.1.4 Different Types of Impact Device

Type of impact device DC(D)/DL D+15 C G E
Impacting energy
Mass of impact body
11mJ
5.5g/7.2g
11mJ
7.8g
2.7mJ
3.0g
90mJ
20.0g
11mJ
5.5g
Test tip hardness:
Dia. Test tip:
Material of test tip:
1600HV
3mm
Tungsten carbide
1600HV
3mm
Tungsten carbide
1600HV
3mm
Tungsten carbide
1600HV
5mm
Tungsten carbide
5000HV
3mm
synthetic diamond
Impact device diameter:
Impact device length:
Impact device weight:
20mm
86(147)/ 75mm 50g
20mm
162mm
80g
20mm
141mm
75g
30mm
254mm
250g
20mm
155mm
80g
Max. hardness of sample 940HV 940HV 1000HV 650HB 1200HV
Mean roughness value of sample surface Ra: 1.6μm 1.6μm 0.4μm 6.3μm 1.6μm
Min. weight of sample:
Measure directly
Need support firmly
Need coupling tightly
 

>5kg
2~5kg
0.05~2kg

 

>5kg
2~5kg
0.05~2kg

 

>1.5kg
0.5~1.5kg
0.02~0.5kg

 

>15kg
5~15kg
0.5~5kg

 

>5kg
2~5kg
0.05~2kg

Min. thickness of sample Coupling tightly
Min. layer thickness for surface hardening
 

5mm

≥0.8mm

 

5mm

≥0.8mm

 

1mm

≥0.2mm

 

10mm

≥1.2mm

 

5mm

≥0.8mm

Size of tip indentation
Hardness 300HV Indentation diameter
Depth of indentation
0.54mm

24μm

0.54mm

24μm

0.38mm

12μm

1.03mm

53μm

0.54mm

24μm

Hardness 600HV Indentation diameter
Depth of indentation
0.54mm

17μm

0.54mm

17μm

0.32mm

8μm

0.90mm

41μm

0.54mm

17μm

Hardness 800HV Indentation diameter
Depth of indentation
0.35mm

10μm

0.35mm

10μm

0.35mm

7μm

0.35mm

10μm

Available type of impact device DC: Test hole or hollow cylindrical; DL:Testslender narrow groove or hole D+15: Test groove or reentrant surface 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

 

 

Type of Impact Device Distance of center of the two indentations Distance of center of the indentation to sample edge
Not less than (mm) Not less than (mm)
D、DC 3 5
DL 3 5
D+15 3 5
G 4 8
E 3 5
C 2 4

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