Material
HLD
HRB
HRC
HRA
HB
HV
HS
Steel and Cast Steel
300-900
38.4-99.8
20-68.4
59.1-85.8
81-654
81.1-955
32.5-99.5
CWT, ST, Tool Steel
300-840
  
20.4-67.1
    
80-898
  
Stainless Steel
300-800
46.5-101.7
19.6-62.4
  
85-655
85-802
  
Gray Cast Iron
360-650
      
93-334
    
Nodular Cast Iron
400-660
      
131-387
    
Cast Aluminum
200-570
23.8-34.6
    
26.8-164
    
Brass
200-550
13.5-95.3
    
40-173
    
Bronze
300-700
      
60-290
    
Copper
200-690
      
45-315