4 Hardness Conversion Chart
ROCKWELL
BRINELL
C
B
D ia. in  m m .,
Vicker or
150 kg. load
100 kg. load
Tensile
3000 kg. load
Hardness
Firth
120 Diamond
1/16 in. dia.
Scleroscope
Strength
10 mm. ball
No.
Hardness  No.
Cone
ball
No.
1000 psi.
2.0 5 8 9 8 4 4 0 2.1 0 8 5 7 4 2 0 2.1 5 8 1 7 4 0 1 2.2 0 7 8 0 1 1 5 0 7 0 1 0 6 3 3 4 2.2 5 7 4 5 1 0 5 0 6 8 1 0 0 3 6 8 2.3 0 7 1 2 9 6 0 6 6 9 5 3 5 2 2.3 5 6 8 2 8 8 5 6 4 9 1 3 3 7 2.4 0 6 5 3 8 2 0 6 2 6 7 3 2 4 2.4 5 6 2 7 7 6 5 6 0 8 4 3 1 1 2.5 0 8 0 1 7 1 7 5 8 8 1 2 9 8 2.5 5 5 7 8 6 7 5 5 7 7 8 2 8 7 2.6 0 5 5 5 6 3 3 5 5 1 2 0 7 5 2 7 6 2.6 5 5 3 4 5 9 8 5 3 1 1 9 7 2 2 6 6 2.7 0 5 1 4 5 6 7 5 2 1 1 9 7 0 2 5 6 2.7 5 4 9 5 5 4 0 5 0 1 1 7 6 7 2 4 7 2.6 0 4 7 7 5 1 5 4 9 1 1 7 6 5 2 3 8 2.8 5 4 6 1 4 9 4 4 7 1 1 6 6 3 2 2 9 2.9 0 4 4 4 4 7 2 4 6 1 1 5 6 1 2 2 0 2.9 5 4 2 9 4 5 4 4 5 1 1 5 5 9 2 1 2 3.0 0 4 1 5 4 3 7 4 4 1 1 4 5 7 2 0 4 3.0 5 4 0 1 4 2 0 4 2 1 1 3 5 5 1 9 6 3.1 0 3 8 8 4 0 4 4 1 1 1 2 5 4 1 8 9 3.1 5 3 7 5 3 8 9 4 0 1 1 2 5 2 1 8 2 3.2 0 3 6 3 3 7 5 3 8 1 1 0 5 1 1 7 6 3.2 5 3 5 2 3 6 3 3 7 1 1 0 4 9 1 7 0 3.3 0 3 4 1 3 5 0 3 6 1 0 9 4 8 1 6 5 3.3 5 3 3 1 3 3 9 3 5 1 0 9 4 6 1 6 0 3.4 0 3 2 1 3 2 7 3 4 1 0 8 4 5 1 5 5 3.4 5 3 1 1 3 1 6 3 3 1 0 8 4 4 1 5 0 3.5 0 3 0 2 3 0 5 3 2 1 0 7 4 3 1 4 6 3.5 5 2 9 3 2 9 6 3 1 1 0 6 4 2 1 4 2 3.6 0 2 8 5 2 8 7 3 0 1 0 5 4 0 1 3 8 3.6 5 2 7 7 2 7 9 2 9 1 0 4 3 9 1 3 4 3.7 0 2 6 9 2 7 0 2 6 1 0 4 3 8 1 3 1 3.7 5 2 6 2 2 6 3 2 6 1 0 3
Covered
Electrodes
Stainless
Steel
Products
Solid Wire
& Rod
Products
ESAB
TIG & MIG
Wires
Cored
Wire
Products
Submerged
Arc
Products
Hard-
surfacing
Products
Calculations
Filler Metals
ASTM
Steels
Conversion
Tables
English/Metric
Tensile
English/Metric
Impact Strength
English/Metric
Gas Flow Rate
Hardness Conv.
Table
General Conv.
Factors
Periodic Table
7 1 2 8 3.8 0 2 5 5 2 5 6 2 5 1 0 2 3 7 1 2 5 3.8 5 2 4 8 2 4 8 2 4 1 0 2 3 6 1 2 2 3.9 0 2 4 1 2 4 1 2 3 1 0 0 3 5 1 1 9 3.9 5 2 3 5 2 3 5 2 2 9 9 3 4 1 1 6