A cast steel angular grit produced by crushing specially heat treated oversize shot pellets. Its behavior in service depends entirely on hardness – a characteristic readily modified by suitable heat treatment.
In-Spec steel grit are used mainly in wheelblasting machinery for cleaning or preparation work on special surfaces.
In addition, In-Spec GL and In-Spec GH steel grit are equally suitable for use in wheelblasting machines and in most cases air blast equipment.
Physical Properties
Property |
In-Spec GP |
In-Spec GL |
In-Spec GH |
Shape when new |
Angular |
Angular |
Angular |
Size |
All materials are screened to meet or exceed SAE or SFS Specification |
Chemicals Analysis |
Carbon > 0.85% - 1.20% ; Phosphorus < 0.05% ; Sulpher < 0.05% |
Average Hardness |
46 ~ 50 HRc |
56 ~ 60 HRc |
63 ~ 65 HRc |
Average Hardness Deviation |
Maximum average deviation is +/-3.0 HRc. Hardness is tested with a Vickers Microhardness Tester with Vicker Indenter 500 gram load or equivalent. |
Min density measures by alcohol displacement |
7.6 g/cc |
7.6 g/cc |
7.6 g/cc |
Microstructure |
High refined and homogenous tempered matenite and bainite. |
Martensite and retained austenite
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