Appendix
NewSonic SonoDur-R
Issue 105 06/2020
Page 72
11
Appendix
11.1
Test probes and their fields of application
11.1.1
Motor Measuring Probes
Test forces: 1 N (HV0.1), 3N (HV0.3) and 8.6 N (HV1)
Load application by motor, fully automatic measurement procedure, the probe just needs to be
placed on the surface.
Main application on smooth (polished, lapped), even coated surfaces (hard chrome, copper) such as
rollers, gravure impression cylinders, automotive components and other components with high
demands on a clean and undamaged material surface and with low surface roughness
11.1.2
Hand-held Measuring Probes
Test forces: 10N (HV1), 30N(HV3), 50N (HV5) und 100N (HV10)
Load application by hand against a spring system; the measuring value is generated automatically
when the specified testing force is reached; load limitation by means of a mechanical stop. Different
designs also with long free vibrating rod end, and/or extra thin diamond tip.
Information on the testing forces:
In the publications and in our documents, the conversions from HV1, HV5, HV10, etc. are sometimes
rounded due to the conversion factor 1 kp (kgf) = 9.81N in Newton, N (HV5 = 49N is often referred to
as 50N, and HV10 = 98N is often referred as 100N). However, the load is set very accurately in
Newton, e.g., 49N or 98N!
The test conditions with respect to surface quality (surface roughness) and layer thickness meet the
requirements of the classic Vickers Hardness Measurement. The UCI Standard DIN 50159-1/2
specifies a maximum roughness Ra of <0.5
μ
m for HV1 measurements, which, in relation to the
penetration depth, corresponds to d≈10
-20 *Ra. Accordingly, it is about 0.8 microns for HV5 and
approx. 1.0 μm for HV10.
In this context, the penetration depth and the average diagonal length Ld will be determined as
follows:
𝑑 = 62 ∗ √
𝑡𝑒𝑠𝑡𝑙𝑜𝑎𝑑 [𝑁]
ℎ𝑎𝑟𝑑𝑛𝑒𝑠𝑠 [𝐻𝑉]
[µm] and
𝐿𝑑 = 434,9 ∗ √
𝑡𝑒𝑠𝑡𝑙𝑜𝑎𝑑[𝑁]
ℎ𝑎𝑟𝑑𝑛𝑒𝑠𝑠[𝐻𝑉]
[µm]
Formel 11-1
Some examples of the more important penetration depth are shown in the following Table in [
μ
m]:
Hardness
HV10
HV5
HV1
HV0.3
HV0.1
800 HV
22
15
7
4
2
600 HV
25
18
9
5
2,5
300 HV
36
25
11
6
4
Table 11-1
