The Janka test is not widely accepted in Europe, because there is a considerable possibility of failure owing to cell wall compression, and because of the more reliable results of the Brinell test
compared with those of the Janka test (Schwab 1990, Niemz and Sttibi 2000, Hirata et al.
For the measuring of the hardness the Brinell test
The Brinell test
measures resistance to indentation and is a common technique used to determine the hardness of castings.
This adaptability means that Equotip hardness testing remains virtually non-destructive, while a Rockwell or a Brinell test
often requires scrapping the object after the test.
There have been many studies that deal with indentation tests using different indenter geometries, such as a spherical indenter (Brinell test
), a conical indenter (Cone hardness, HG, O'Neill (2)) and a diamond pyramid indenter (Vickers test, or HV).
There are several types of hardness tests, including the Brinell test
, the Rockwell test, the Vickers test and the durometer test.
Although the Brinell test
is widely known as one of the most accurate test methods for hardness testing of metals, error in the reading of the indentation size results in measurement errors of 0.1 mm between operators -- the range is even greater between labs.
Parts are loaded into the cell, and a carousel moves them to the Brinell test
and onto the PCRT test station, which uses a single electronics package to alternately test left and right knuckles.
Hochstein describes the Brinell test
as "...one of the few working tools we have, but it's certainly only part of the equation when determining machinability." Hachtman calls the Brinell test
"inconsistent at best" as a reading for machinability.
The standard Brinell test
uses a 10mm ball under three different load levels: 500kg, 1500kg and 3000kg.
The most common method of measuring hardness in the foundry is the Brinell test
, which is particularly effective on soft materials.