Abrasive for Steel

Abrasives products
Abrasive type Code
A=Aluminum Oxide
C=Silicon Carbide
Z=Zirconia Aluminum
ZA=Zirconia Aluminum + Aluminum Oxide 
AC=Aluminum Oxide + Silicon Carbide 
WA=White Corundum  
 
Grit size
16-24 = coarse
30-60 = medium
70-200=fine 
 
Hardness grade (discs properties)  
 The hardness is graded from soft to hard in alphabetical order(A to Z)  
 H-K = soft
L-O = medium
P-S = hard 
T-Z = very hard 
 
Structure
1-3 = tight
4-5 = medium
6-8 = open
9-10 = very open 
 
Bond
BF= Resinoid bond, fibre-reinforced, woven or non-woven  
Maximum Operating Speed 
 50m/s   blue
 64m/s   yellow
 80m/s   red
 100m/s  green  
 Dimensions and shape 
 Cutting and grinding discs 
 Flat type   depressed center type   conical type  
FOR STEEL
It is widely used to polish and cut steel/ metal products.
It is charactered by its fast and durable cutting,