4300
Measuring and Converting Ranges Fig.1
Material
HL
HRC
HRB
HB
HS
HV
2
30D
2
10D
Steel & Cast St.
C.W. Tool Steel
ST.STEEL
Gray Cast Iron
Nodular Cast Iron
Cast Aluminum
Brass
Bronze
Copper
80~940
80~898
80~802
32.5~99.5
20~159
45~315
60~290
40~173
80~647
85~655
93~334
131~387
300~900
200~690
300~700
200~550
174~560
400~660
360~650
300~800
300~840
20.0~68.0
38.4~99.5
20.4~67.1
19.6~62.4
46.5~101.7
13.5~95.3
Symbols of materials Fig.2
Symbol Illustrations
1 Steel and cast steel
2 Cold work tool steel
3
Stainless steel and high temperature-resistant steel
4 Cast iron with lamellar graphite (grey cast iron GG)
5 with spheroidal and nodular graphite (GGG)Cast iron
6 Cast aluminum alloys
7 Copper - zinc alloys (brass)
8 Copper-alu /copper-tin alloys (bronze)
9 Copper
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