Rockwell Tester Instructions

Ames Conversion Chart

Download our handy Ames conversion chart to convert your Rockwell readings to Brinell and to determine which scale to test in

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Rockwell Hardness Tester Instructions

For Use With Ames Standard Hardness Testers
SCALE Major Load(kg) Penetrator Type Dial Color Use Barrel Typical Materials
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 Note: There is only one row of dial numbers for the Ames superficial tester.
SCALE Major Load(kg) 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

Comparison Gage Chart
Gage Number Thickness in decimals
8 .171
10 .140
12 .109
14 .078
16 .062
18 .050
20 .037
22 .031
Comparison Gage Chart View Our Thickness Chart Click Here

Further Reading On Using Your Rockwell Tester

Accurately Reading a Rockwell Portable Hardness Tester
How To Use A Rockwell Portable Hardness Tester