Impact Devices For Hardness Tester
Impact device D: Universal device for most hardness requirements
Impact device DC: Ultra-short version; manually loaded on the front; same characteristics as type D; for testing in boreholes,built-in parts, hollow cylindrical parts, etc.; max. 940 HV
Impact device DL: With extremely long and fine front piece only for steel and cast steel; for testing in narrow or hard to reach areas; max. 950 HV
Impact device D+15: The front part is narrow and the coil is located behind it; same characteristics as type D; only for steel;for hardness testing in slots, grooves, recessed areas, gear flanks,grooves, cavities, tooth flanks, etc.; max. 940 HV
Impact device C: Reduced impact energy of about 1/4 of type D; for tempered or surface treated steel, small or sensitive-to-shock parts (minimal imprint is left); max. 1000 HV
Impact device G: With large test-tip diameter; impact energy 9 times larger than type D; on steel, gray or nodular cast iron; for large cast parts and forgings or parts with high surface roughness;max. 650 HB (only in Brinell)
Impact device E: With a synthetic diamond test tip of approx.5000 HV; for very hard materials (above 50 HRC / 650 HV) such as carbide, barrels, etc.; max. 1200 HV
| Material |
Method |
Impact device |
| D/DC |
D+15 |
C |
G |
E |
DL |
|
Steel and cast steel
|
HRC |
20～68.5 |
19.3～67.9 |
20.0～69.5 |
|
22.4～70.7 |
20.6～68.2 |
| HRB |
38.4～99.6 |
|
|
47.7～99.9 |
|
37.0～99.9 |
| HRA |
59.1～85.8 |
|
|
|
61.7～88.0 |
|
| HB |
127～651 |
80～638 |
80～683 |
90～646 |
83～663 |
81～646 |
| HV |
83～976 |
80～937 |
80～996 |
|
84～1042 |
80～950 |
| HS |
32.2～99.5 |
33.3～99.3 |
31.8～102.1 |
|
35.8～102.6 |
30.6～96.8 |
|
Cold work
tool steel
|
HRC |
20.4～67.1 |
19.8～68.2 |
20.7～68.2 |
|
22.6～70.2 |
|
| HV |
80～898 |
80～935 |
100～941 |
|
82～1009 |
|
|
Stainless steel
|
HRB |
46.5～101.7 |
|
|
|
|
|
| HB |
85～655 |
|
|
|
|
|
| HV |
85～802 |
|
|
|
|
|
|
Grey cast iron
|
HRC |
|
|
|
|
|
|
| HB |
93～334 |
|
|
92～326 |
|
|
| HV |
|
|
|
|
|
|
| Nodular cast iron |
HRC |
|
|
|
|
|
|
| HB |
131～387 |
|
|
127～364 |
|
|
| HV |
|
|
|
|
|
|
| Cast aluminium alloys |
HB |
19～164 |
|
23～210 |
32～168 |
|
|
| HRB |
23.8～84.6 |
|
22.7～85.0 |
23.8～85.5 |
|
|
| BRASS(copper-zinc alloys) |
HB |
40～173 |
|
|
|
|
|
| HRB |
13.5～95.3 |
|
|
|
|
|
| BRONZE(copper-aluminium/tin alloys) |
HB |
60～290 |
|
|
|
|
|
| Wrought copper alloys |
HB |
45～315 |
|
|
|
|
|
| Available type of impact device |
|
DC: Test hole or hollow cylindrical |
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 |
DL: Test slender narrow groove or hole |
Testing conditions:
| 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
|
Product Tags:
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Impact Devices For Hardness Tester Images
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