Erichsen 430 Smart
Coatings & Industry > Mechanical properties > Adhesion & Elongation
SCRATCH HARDNESS TESTER 430 P-Smart
Programmable Logic Control (PLC)
Optionally with manually actuated/motor-driven loading force and manually actuated/automatic test panel turn
Operation, documentation and data management via ERICHSEN-App
Standards
- DIN EN ISO 2409
- ASTM D 3359
- JIS K 5600-5-6
- SNV 37 111
- VDA 621-411
- ECCA T6
- GME 60 280
Main Tests
- Scratch Hardness
- Cross Hatch Cut
- Scratch Resistance
- Writing Effect
Purpose and Application
The motor-driven SCRATCH HARDNESS TESTER 430 P-Smart is a universal testing instrument designed for carrying out a wide range of tests on varnished and plastic surfaces to determine their resistance to scratches and cuts. Single cuts, parallel cuts and - by turning the specimen by 90° - cross-cuts can be applied to test panels of various thicknesses.
The SCRATCH HARDNESS TESTER 430 P- Smart is particularly provided for adhesion tests using the cross hatch cut method (in accordance with all mostly required standards) and for specific plastics tests according with Opel (scratch resistance and writing effect). For these as well as for further tests numerous setting possibilites on the basic instrument and a large variety of test tools are available.
Using the SCRATCH HARDNESS TESTER 430 P-Smart, series testing can be conducted with much greater ease.
The results of testing are reproducible and well-defined.
Cross Hatch Testing
The SCRATCH HARDNESS TESTER 430 P- Smart enables cross hatch tests to be conducted in accordance with all the usual standards, summarized in the following table, and carried out immediately without additional programming.
The following cross-cuts can be selected by pressing a key (number of cuts x distance in mm between cuts) 2 x 5, 6 x 1, 6 x 2, 6 x 3, 8 x 1, 8 x 2, 11 x 1.
The cuts are carried out automatically in succession using the test tip for cross hatch at a cutting speed of 40 mm/s.
After turning the test panel manually by 90°, the procedure is repeated to complete the cross-cut pattern.
The load required to ensure that the layer of varnish will be cut through to the substrate must be ascertained in trial runs.
With Model 430 P-II-Smart or Model 430 P-IV-Smart (motor-driven force adjustment) this can be carried out very simply by performing a "trial cut".
For the examination of cross hatch cuts a magnifiying glass with 2.5 magnification is included in the scope of supply.
To evaluate the cross hatch pattern achieved, it is visually related to a comparison pattern within a scheme indicated in the relevant standard (cross cut classification).
In ECCA T6 it is mentioned that the cross hatch cut test may be intensified by a subsequent cupping test according to DIN EN ISO 1520.
For this purpose we recommend the ERICHSEN Lacquer and Paint Testing Machines, models 200 and 202 EM.
Although the results of adhesion tests in accordance with the cross hatch method are comparable with each other, they are - due to their respective procedures - not transferable to results of alternative test methods (e. g. perpendicular pull-off test according to DIN EN ISO 4624).
The ERICHSEN production programme offers the following model for adhesion testing to the pull-off method: Adhesion Test Apparatus, Model 525 (manual / inexpensive)
