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 |
|||||
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 |
|
|
|
|
|
|
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Nodular cast iron |
HRC |
|
|
|
|
|
|
HB |
131~387 |
|
|
127~364 |
|
|
|
HV |
|
|
|
|
|
|
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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 |
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 |
Support rings for Shaped Materials
No. |
Type |
Sketch of non-conventional Supporting ring |
Remarks |
1 |
Z10-15 |
For testing cylindrical outside surface R10~R15 |
|
2 |
Z14.5-30 |
For testing cylindrical outside surface R14.5~R30 |
|
3 |
Z25-50 |
For testing cylindrical outside surface R25~R50 |
|
4 |
HZ11-13 |
For testing cylindrical inside surface R11~R13 |
|
5 |
HZ12.5-17 |
For testing cylindrical inside surface R12.5~R17 |
|
6 |
HZ16.5-30 |
For testing cylindrical inside surface R16.5~R30 |
|
7 |
K10-15 |
For testing spherical outside surface SR10~SR15 |
|
8 |
K14.5-30 |
For testing spherical outside surface SR14.5~SR30 |
|
9 |
HK11-13 |
For testing spherical inside surface SR11~SR13 |
|
10 |
HK12.5-17 |
For testing spherical inside surface SR12.5~SR17 |
|
11 |
HK16.5-30 |
For testing spherical inside surface SR16.5~SR30 |
|
12 |
UN |
For testing cylindrical outside surface, radius adjustable R10~∞ |