Feng Erda High-carbon Cast Steel Grit standard:

GB/T18838.3-2008 steel shot and steel grit,SFSA20-66 Cast Steel Abrasive,SAE J827 Cast Steel Shot,SAE J1993 High Carbon Steel Grit,ISO11124-3 High Carbon Cast Steel Shot and Grit standard.

 Size of High-carbon Cast Steel Grit ：G12，G14，G16，G18，G20，G25，G40，G50，G80

Different Specifications of GP,GL,GH Steel Grit:

GP Steel Grit, (42-50HRC)
GP Steel Grit rounds off rapidly in use and is particularly suited for removing sand of casting and scaling oxide.
GL Steel Grit, (56-60HRC)
GL Steel Grit is harder than GP Steel Grit. It loses sharpness during operation and is suited for plate and section preparation.
GH Steel Grit, (60-66HRC)
GH Steel Grit has maximum hardness to maintain angularity during operation and provides a constant cutting (etching) action.GH Steel Grit is specifically designed for Air Blast Operations