4
steel ball diameter is a constant, can the same hardness of the same specimen with steel ball of different diameters
and different test forces be obtained. For details, please refer to Table 2.
Fig-2 Tungsten carbide ball indenter
Table 2 Selection of carbide ball diameters and test forces in Brinell Hardness Test
Test force
Diameter
F/D
2
Diameter D of tungsten carbide ball
Range of
hardness
Range of applications
10
5
2.5
1.25
1
30
3000
750
187.5
46.9
30.0
140-(945)
Steel, aluminum and gray cast iron
10
1000
250
62.5
15.6
10.0
48-315
5
500
125
31.2
7.8
5.0
23.8-158
Annealed aluminum
2.5
250
62.5
15.6
3.9
2.5
11.9-79
Bearing alloy
1.25
125
31.2
7.8
2.0
1.2
6.0-39
Conductor wires
0.5
50
12.5
3.1
0.8
0.5
2.4-15.8
Soft materials
4
Technical Parameters
Main Technical Parameters are included in Fig-3 and Table 3:
Table 3 Main Technical Parameters
Item (code)
Content
Measuring range
8-650HBW
Height (H)
910 mm
Width (W)
330 mm
Length (L)
722 mm
Maximum height of specimen (without sleeve) (B)
280 mm
Depth of throat (A)
150 mm
Net weight
230 kg
Power supply
220V / 110V, 50 / 60 Hz
Unit
Grades of test force (kgf)
Tungsten carbide ball indenter (mm)
Brinell
187.5
250
500
750 1000
3000
2.5
5
10
