ACCESSORIES FOR PORTABLE LEEB HARDNESS TESTER
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 |
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|
D/DC |
D+15 |
C |
G |
E |
DL |
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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 |
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HRA |
59.1～85.8 |
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|
61.7～88.0 |
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HB |
127～651 |
80～638 |
80～683 |
90～646 |
83～663 |
81～646 |
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|
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 |
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|
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 |
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Stainless steel
|
HRB |
46.5～101.7 |
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HB |
85～655 |
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HV |
85～802 |
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Grey cast iron
|
HRC |
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HB |
93～334 |
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|
92～326 |
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HV |
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Nodular cast iron |
HRC |
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HB |
131～387 |
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|
127～364 |
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HV |
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Cast aluminium alloys |
HB |
19～164 |
|
23～210 |
32～168 |
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HRB |
23.8～84.6 |
|
22.7～85.0 |
23.8～85.5 |
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BRASS(copper- zinc alloys) |
HB |
40～173 |
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HRB |
13.5～95.3 |
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BRONZE(copper- aluminium/tin alloys) |
HB |
60～290 |
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Wrought copper alloys |
HB |
45～315 |
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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 |
|
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 |
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|
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 |
Support rings for Shaped Materials
|
No. |
Type |
Sketch of non-conventional Supporting ring |
Remarks |
|
1 |
Z10-15 |
|
For testing cylindrical outside surface R10～R15 |
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2 |
Z14.5-30 |
For testing cylindrical outside surface R14.5～R30 |
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3 |
Z25-50 |
For testing cylindrical outside surface R25～R50 |
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4 |
HZ11-13 |
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For testing cylindrical inside surface R11～R13 |
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5 |
HZ12.5-17 |
For testing cylindrical inside surface R12.5～R17 |
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6 |
HZ16.5-30 |
For testing cylindrical inside surface R16.5～R30 |
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7 |
K10-15 |
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For testing spherical outside surface SR10～SR15 |
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8 |
K14.5-30 |
For testing spherical outside surface SR14.5～SR30 |
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9 |
HK11-13 |
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For testing spherical inside surface SR11～SR13 |
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10 |
HK12.5-17 |
For testing spherical inside surface SR12.5～SR17 |
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11 |
HK16.5-30 |
For testing spherical inside surface SR16.5～SR30 |
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12 |
UN |
|
For testing cylindrical outside surface, radius adjustable R10～∞ |
