Hardness Testing


Video Instructions

Use the Ames hardness tester to determine the hardness of the annealed steel specimen.  Take a minimum of three readings.  Report your findings in the standard lab report format.

The tester should not take excessive force to read, but sometime the dial gets stuck.  If the major load is not easily “dialed in,” see the instructor.  Do not use excessive force on the reader or it will be ruined.


For Use With Ames Style 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

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