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| Chemical Composition |
| The finished grit shall have the chemical compositions as follows: |
| Carbon |
0.85-1.20% |
| Silicon |
0.45-1.50% |
| Manganese |
0.35-1.20% |
| Phosphorus |
<0.05% |
| Sulfur |
<0.05% |
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Standard Hardness
The steel grit is manufactured by crushing the fully hardened shot to granular grit form, screening and tempered to three different hardness range as follows :
GH = 63-67 HRc.
GL = 56-60 HRc.
GP = 40-50 HRc.
It is also available in tempering to various hardness range for special application
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Microstructure
The microstructure of steel grit shall be uniform martensite, tempered to a degree consistent with the hardness range,with fine,well distributed carbides, if any. |
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Density
The density of steel grit shall be not less than 7.4 g/cc. |
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| Size Distribution (as per SAE J 827) |
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