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