Hardness Testing: Methods, Applications & How an [FP]-LIMS Supports Materials Testing
Hardness testing is one of the most important methods in mechanical materials testing – fast, informative and indispensable in the quality assurance of automotive and metal businesses. This article explains the common methods (Brinell, Rockwell, Vickers & co.), their application and how [FP]-LIMS captures hardness values centrally and makes them traceable.
What is a hardness test?
A widely used method to measure the mechanical resistance of surfaces is hardness testing. There are various procedures for testing the hardness of a component or material. The methods differ in the body shape of the indenter: for example, there is Brinell hardness, Rockwell hardness and Vickers hardness.
The indenter is placed on the surface of the material to be tested and a standardized force is applied. The penetration depth (or the indentation size) is then measured, and the degree of hardness is determined on this basis.
The common hardness testing methods at a glance
The Brinell and Rockwell methods both use a standardized ball as the indenter; the Vickers method is based on an equilateral diamond pyramid. Further methods include Martens, Knoop, Shore, Barcol, Buchholz and many more. The most important ones compared:
| Method | Indenter | Particularly suited for |
|---|---|---|
| Brinell | Standardized ball | Large samples and materials with coarse or inhomogeneous grain structure |
| Rockwell | Ball / diamond cone | Larger sample geometries, mainly metallic materials |
| Vickers | Diamond pyramid | Hardness testing of all solids, including welds |
| Knoop | Elongated diamond pyramid | Hard, brittle materials such as ceramics |
Application of hardness testing: why measure hardness?
The hardness of materials is an informative property: it provides information about the wear resistance of materials. Especially in the area of cutting tools, hardness plays a decisive role as a material property.
In practice, hardness testing is used above all in quality management: at incoming and outgoing goods, the quality of products and materials is checked. To manage the data obtained, software for the right information flow is recommended.
Devices & standards
Since hardness is a central material property, numerous devices are offered on the market. The systems from ZwickRoell in particular have proven reliable for measuring the hardness of metals, plastics, rubber and special materials – taking all applicable standards into account.
Hardness testing in the LIMS workflow
A hardness measurement provides valuable data – but it only delivers its full value when the data is reliably captured, checked, archived and evaluated. The [FP]-LIMS from Fink & Partner is used in particular in the area of quality management:
Automatic data import
The data aggregated by a hardness tester is forwarded automatically to the software – no manual typing.
Working with raw data
Since [FP]-LIMS works exclusively with raw data, documentation can be automated.
Quality history
The quality history can always be reviewed; in case of non-compliance, the origin is found quickly.
Securing standards
Evaluations of the data ensure that quality standards are maintained – documented in an audit-proof way.
Hardness testing in automotive & materials testing
In the automotive supply industry and in materials testing in particular, the combination of fast hardness measurement and a powerful LIMS is especially valuable. Hardness values are a central quality proof here – for example for heat-treated components, welds or surface treatments:
- Incoming goods: incoming materials are checked for their hardness and released.
- Process control: hardness profiles are documented and monitored throughout production.
- Outgoing goods: the final quality is verified before delivery.
- Traceability: every hardness value is clearly assigned to the batch or component – audit-proof.
Frequently asked questions about hardness testing with [FP]-LIMS
What is a hardness test?
A test method for determining the mechanical resistance of a surface. It measures how deep a standardized indenter penetrates into the material.
Which hardness testing methods are common?
Brinell, Rockwell and Vickers, as well as others such as Martens, Knoop, Shore, Barcol and Buchholz.
Why do you measure the hardness of materials?
To assess wear resistance and for quality assurance at incoming and outgoing goods.
Which devices are typically used?
In practice, systems from ZwickRoell, among others, are used for metals, plastics, rubber and special materials.
How does [FP]-LIMS support hardness testing?
Measuring device data is transferred to [FP]-LIMS, stored centrally and evaluated. The system works with raw data, automates documentation and enables ongoing quality monitoring.