DAEKYUNG TECH & TESTERS Mfg. CO.,LTD
- 13 -
Scale
Indenter
Std. Load
(kgf)
Test Load
(kgf)
Hardness
Expression
Application Scope
A
D
C
Cone line-tip angle 120±30°
Diamond indenter that the
curvature
radius
of
the
spherical surface is
0.2 ±0.02mm
10
60
100
150
100-500h
Sintered Carbide
Carburizing Steel
Pearlitic Malleable Iron
Carbon Steel
F
B
G
Name: 1/16" Steel Ball
(Diameter: 1.588mm)
10
60
100
150
130-500h
Copper Alloy
Aluminum Alloy
Malleable Iron
Soft Steel
H
E
K
Name: 1/8" Steel Ball
(Diameter: 3.175mm)
10
60
100
150
130-500h
Powder Alloy
Aluminum Alloy
Magnesium Alloy
Grindstone
L
M
P
Name: 1/4" Steel Ball
(Diameter: 6.350mm)
10
60
100
150
130-500h
Plastics
Light Alloy
Lead
R
S
V
Name: 1/2" Steel Ball
(Diameter: 12.70mm)
10
60
100
150
130-500h
Plastics
Light Alloy
9.1 Reference Table 1. Rockwell Hardness Scale
