|
|
Rockwell Scales
For Use With Ames Standard Hardness Testers
|
|
Scale
|
Major
Load
KG
|
Type Of
Penetrator
|
Dial
Color
|
Use
Barrel
|
Typical Materials Tested
|
|
|
A
|
60
|
C Diamond
|
Black
|
C
|
Extremely hard materials, Tungsten Carbide thin steel and low hardened steel
|
|
B
|
100
|
1/16" Ball
|
Red
|
B
|
Medium hard materials, Low and medium Carbon steels, brass, aluminum Alloys, malleable iron, etc.
|
|
C
|
150
|
C Diamond
|
Black
|
C
|
Hardened steels, hardened and tempered alloys, hard cast iron, pearlitic malleable iron, titanium, and other materials harder than B100
|
|
D
|
100
|
C Diamond
|
Black
|
C
|
Medium case hardened steel, thin steel, and pearlitic malleable iron
|
|
E
|
100
|
1/8" Ball
|
Red
|
B
|
Cast iron, Aluminum and magnesium alloy bearing metals
|
|
F
|
60
|
1/16" Ball
|
Red
|
B
|
Annealed brass and copper alloys, thin soft sheet metals
|
|
G
|
150
|
1/16" Ball
|
Red
|
B
|
Beryllum copper, phosphor bronze, malleable irons, etc.
|
|
H
|
60
|
1/8" Ball
|
Red
|
B
|
Aluminum sheet, zinc, lead
|
|
K
|
150
|
1/8" Ball
|
Red
|
B
|
Cast iron, aluminum alloys, bearing materials
|
|
L
|
60
|
1/4" Ball
|
Red
|
B
|
Plastics and soft metals such as lead, thin materials
|
|
M
|
100
|
1/4" Ball
|
Red
|
B
|
Same as "L" scale
|
|
P
|
150
|
1/4" Ball
|
Red
|
B
|
Same as "L" scale
|
|
R
|
60
|
1/2" Ball
|
Red
|
B
|
Same as "L" scale
|
|
S
|
100
|
1/2" Ball
|
Red
|
B
|
Same as "L" scale
|
|
V
|
150
|
1/2" Ball
|
Red
|
B
|
Same as "L" scale
|
|
|
|
Ames Superficial Hardness Tester
|
|
Rockwell Scales
|
|
Scale
|
Major
Load KG
|
Type Of
Penetrator
|
Typical Material Tested
|
|
|
15N
|
15
|
"S" Diamond
|
Same materials as standard Rockwell except where shallow penetration is necessary as in:
|
|
30N
|
30
|
"S" Diamond
|
|
45N
|
45
|
"S" Diamond
|
|
15T
|
15
|
1/16" Ball
|
Shallow case hardened parts. To .010" inch
|
|
30T
|
30
|
1/16" Ball
|
" " " " " "
|
|
45T
|
45
|
1/16" Ball
|
Hard thin material down to .006" inch
|
|
15W
|
15
|
1/8" Ball
|
" " " " " "
|
|
30W
|
30
|
1/8" Ball
|
Cemented Carbides
|
|
45W
|
45
|
1/8" Ball
|
" "
|
|
15X
|
15
|
1/4" Ball
|
Plastics
|
|
30X
|
30
|
1/4" Ball
|
"
|
|
45X
|
45
|
1/4" Ball
|
"
|
|
15Y
|
15
|
1/2" Ball
|
"
|
|
30Y
|
30
|
1/2" Ball
|
"
|
|
45Y
|
45
|
1/2" Ball
|
"
|
|
Note: There is only one row of dial numbers for the Ames superficial tester.
|
|
|
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Comparison Gage Chart
|
|
Gage Number
|
Thickness In Decimals
|
|
|
8
|
.171
|
|
10
|
.140
|
|
12
|
.109
|
|
14
|
.078
|
|
16
|
.062
|
|
18
|
.050
|
|
20
|
.037
|
|
22
|
.031
|
|
