Steel Grits (Special Treatment) are made of tempered martensite, with various hardness, excellent resistance, giving less dust, longer recycle life, low cost and extensively used for cleaning jobs such as castings and other large fabricated parts.

Steel Grit (ST) – GH-12
Steel Grit (ST) – GH-12
Steel Grit (ST) – GH-25
Steel Grit (ST) – GH-25
Steel Grit (ST) – GH-50
Steel Grit (ST) – GH-50

Typical Chemical Composition

Element Composition
Carbon (C) 0.85 – 1.20 %
Silicon (Si) 0.50 – 1.00 %
Chrome (Cr) 0.15 – 0.50 %
Sulphur (S) 0.035 % max
Phosphorous (P) 0.035 % max
Manganese (Mn) 0.70 – 1.20 %

Physical Properties

Microstructure Uniform martensite, tempered to a degree consistent with hardness range with fine and well-distributed carbides.
Density The specific density of cast steel shot shall not be less than 7.40 gm/cm3.
Hardness GH > 60 HRC
GL 54 – 60 HRC
GP 40 – 51 HRC
Hardness deviation is not more than +/- 3 HRC.
90% of the particles tested shall have a hardness value within one of the ranges of Standard hardnesses.
Life-Span 2500 – 2800 times