Versitron Operation Manual 73
10.0 REFERENCE TABLES, ASTM E18
10.1 Rockwell Scale Reference Table
Scale
Symbol
Indenter Major
Load
Dial
Figures,
kgf
Typical Application of Scales
B 1/16-in. (1.588mm) ball 100 Red Copper alloys, soft steels, aluminum alloys, malleable iron, etc.
C
diamond 150 Black
Steel, hard cast irons, pearlitic malleable iron, titanium, deep
case hardened steel and other materials harder than B 100.
A
diamond 60 Black Cemented carbides, thin steel, shallow case-hardened steel.
D
diamond 100 Black
Thin steel and medium case hardened steel, and pearlitic
malleable iron.
E
1/8-in. (3.175-mm) ball 100 Red Cast iron, aluminum and magnesium alloys, bearing metals.
F
1/16-in. (1.588-mm) ball 60 Red Annealed copper alloys, thin soft sheet metals.
G
1/16-in. (1.588-mm) ball 150 Red Malleable irons, copper-nickel-zinc and cupro-nickel alloys.
H
1/8-in. (3.175-mm) ball 60 Red Aluminum, zinc. lead.
K
1/8-in. (3.175-mm) ball 150 Red
L
¼-in. (6.350-mm) ball 60 Red
Bearing metals and other very soft or thin materials. Use
smallest ball and heaviest load that does not give anvil
effect.
M
¼-in. (6.350-mm) ball 100 Red
P
¼-in. (6.350-mm) ball 150 Red
R
½-in. (12.70-mm) ball 60 Red
S
½-in. (12.70-mm) ball 100 Red
V
½-in. (12.70-mm) ball 150 Red
10.2 Minimum Thickness
NOTE—For a given thickness, any hardness greater than that corresponding to that thickness can be tested. For a given hardness, material of any greater thickness than
that cor- responding to that hardness can be tested on the indicated scale.
*These approximate hardness numbers are for use in selecting a suitable scale and should not be used as hardness conversions. If necessary to convert test readings to
another scale, refer to the ASTM Standard Hardness Conversion Tables E 140 for Metals (Relationship Between Brinell Hardness, Vickers Hardness, Rockwell
Hardness, Rockwell Superfi- cial Hardness, and Knoop Hardness.)
Charts reprinted from ASTM Handbook
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