Guide To Hardness Testing Of Strips
Spring Steel Strips Thickness
0.9mm & above		 Thickness
0.9 to 0.60		 Thickness
0.6 to 0.40		 Thickness
0.4 to 0.3		 Thickness
0.3 to 0.25		 Thickness
0.24 to 0.10
Oil tempered scale less
EN-42J/C-80/C-98 Blue tempered C-98		 HV 100
C Scale		 HV-60
30 N		 HC-30
30 N		 HV-10
15 N		 HV-5
 HV-2
Cold Rolled Annealed
EN-8/EN-9/EN-45		 HV-60
B Scale		 HV-30
30 T		 HV-15
15 T		 HV-15
15 T		 HV-5
 HV-1
Hard Rolled
EN-8/EN-9/EN-45		 HV-100
C Scale		 HV-60
30-N		 HV-30
30-N		 HV-10
15-N		 HV-5
 HV-2

 

Instructions
B Scale : Use the A.B.C Standard Rockwell Hardness Tester with a 100 kg load, 1/6* steel ball penetrator and teh steel anvil. 30N Scale : Use the Superficial Rockwell Hardness Tester with a 30 kg load the diamond point N-Brale Penetrator and the steel anvil.
C-Scale : Use the A.B.C. Standard Rockwell Hardness Tester with a 150 kg load the diamond point brale penetrator and the steel anvil. 15T Scale : Use the Superficial Rockwell Hardness Tester with a 15 kg load 1/16* steel ball penetrator and the diamond anvil.
30T-Scale : Use the Superficial Rockwell Hardness Tester with a 30 kg load, 1.16 steel ball penetrator and either the diamond or the steel anvil. 15N-Scale : Use the Superficial Rockwell hardness Tester with a 15 kg load the diamond point N-Brale penetrator and the steel anvil.
HV -     Use vickers hardness tester
1 kg - 100kg load suffix indication load
to be used for testing