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Steel - Shot PDF Print E-mail
Fenotec
Chemical Composition

The finished shot shall have the chemical compositions as follows :

Carbon 0.85 - 1.20 %
Silicon 0.40 - 1.50 %
Manganese 0.35 - 1.20 %
Phosphorus < 0.05 %
Sulfur < 0.05 %

 

Standard Hardness

The hardness of 90% of all shot particles shall be within the range of 40-50 HRc. (Rockwell C)


General Appearance

The steel shot shall be as nearly spherical as commercially possible and no more 20% of the shot particles shall have objectionable defects.


Microstructure

The microstructure of steel shot shall be uniform martensite, tempered to a degree consistant with the hardness range, with fine, well distributed carbides, if any.


Density

The density of steel grit shall be not less than 7.4 g/cc.


Size Distribution (as per SAE J 827)

Mesh No. Sieve
(mm)		 Shot Number
S-780 S-660 S-550 S-460 S-390 S-330 S-280 S-230 S-170 S-110
7 2.800 All Pass                  
8 2.360   All Pass                
10 2.000 85% min   All Pass All Pass            
12 1.700 97% min 85% min   5% max All Pass          
14 1.400   97% min 85% min   5% max All Pass        
16 1.180     97% min 85% min   5% max All Pass      
18 1.000       96% min 85% min   5% max All Pass    
20 0.850         96% min 85% min   10% max All Pass  
25 0.710         85% min 96% min 85% min   10% max  
30 0.600             96% min 85% min   All Pass
35 0.500               97% min   10% max
40 0.425                 85% min  
45 0.355                 97% min  
50 0.300                   80% min
80 0.180                   90% min


 
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