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3.GENERAL INFORMATION
3.1 BRINELL HARDNESS TESTING (EN 6506-1,ASTM E10)
Brinell Hardness testing method is actuated by balls with several sizes depending on
material type,thickness and loads applied. Diameters of ball indentations can be evaulated by optical
system built-in hardness tester.
Relations with thickness of specimen,ball dia and material shown in related the table
Thickness of
material (mm)
Ball dia(mm)
P=30D2
Steel,iron,
cast iron
P=10D2
Brass, Bronze,
Cupper,
Aluminium
P=D2
Soft cupper
P=5D2 Lead
6 mm and up
10
3.000 kgf
1.000 kgf
500 kgf
250 kgf
3 mm and up
5
750 kgf
250 kgf
125 kgf
62,5 kgf
1,2 mm and up
2,5
187,5 kgf
62,5 kgf
31,25 kgf
15,625 kgf
Table 1
3.2 PRIOR TO TESTING
First swich on computer systems ( 23 in Picture 1) ,after then, swich on touch screen panel
( 4 in Picture 25) .Later, swich on,motoring system (2- Picture 23).
Run OPTOBUL Software on touch screen panel..Equipment optical positioned automaticely.
Locate suitable ball indenter into indenter holder using Table 1
3.3 CHOOSING THE TESTING METHOD & OBSERVING SURFACE
Choose Brinell hardness testing method in settings (ball/load)
See OPTOBUL software
Locate, sample on testing table.
Raise, elevating screw until clamping attachment touches on the surface of sample.
At this time, observe, surface of sample on touch screen panel.
3.4TESTING
Press to the START
Swiweling starts from the optical position to loading position & test loading begins.
When load application , dwelling starts and when it is over,device automatically swiwelled to
the optical position.
In the meantime, ball indentation shown in the screen.
Pls follow OPTOBUL program.
Measurement to be made clean and smooth surfaces must be measured in terms of health.
