Abrasive Products offers a variety of metallic abrasives.  Two of the most common types are steel shot and steel grit.  People occasionally will use the terms shot and grit interchangeably.  They are very different products.  Steel shot is spherical in shape. Steel grit is random and angular.  Steel shot will provide a smoother surface than steel grit.  Steel grit, given its’ shape, will etch or erode the surface.

Both steel shot and steel grit come in a variety of hardness and sizes.  The bulk density of either steel shot or grit are very high and must be taken into consideration in relation to their use in equipment.  Appropriate equipment must be selected to convey either of these products.

Both steel shot and steel grit are sized by screening.  Sizing represent a range of particle size.  A size of either shot or grit will contain particles, within a set range for that given size.  Some particles within the size may be slightly larger and some of the particles will be slightly smaller, but all will fall within a specified size range.  The larger the size number for steel shot, the larger the particle. The larger the size number for steel grit, the smaller the particle.

Processes using steel shot and grit must be able to tolerate a level of ferrous residue on the workpiece.  As these products break down, they will leave ferrous contamination on the parts being blasted.  Steel shot and grit are popular choices in wheel blast equipment and appropriately outfitted blast rooms due to their durability or low attrition rate.

Abrasive Products can help you determine if steel shot or steel grit abrasive may be the best solution to your blasting application.  We are happy to develop a process for you in our in-house process development lab.

Steel Shot Characteristics

  • Round in shape
  • Hardness ranges:
    • GP (40 – 51 Rc)
    • GL (54 – 61 Rc)
    • GH  (> 60 Rc)
  • Sizes
    • S70  (approximately .012”)
    • S110 (approximately .014”)
    • S170 (approximately .020”)
    • S230 (approximately .028”)
    • S280 (approximately .032”)
    • S330 (approximately .041”)
    • S390 (approximately .047”)
    • S460 (approximately .056”)
    • S550 (approximately .062”)
    • S660 (approximately .080”)
    • S780 (approximately .111”)
  • Approximately 300 pounds per cubic foot

Steel Grit Characteristics

  • Angular, random shape
  • Hardness ranges from
    • GS  (40 – 51 Rc)
    • GM  (47 – 56 Rc)
    • GL  (54 – 61 Rc)
    • GH  (>60 Rc)
  • Sizes
    • G16  (approximately .54”)
    • G18  (approximately .047”)
    • G25  (approximately .040”)
    • G40  (approximately .032”)
    • G50  (approximately .023”)
    • G80  (approximately .017”)
    • G120  (approximately .080”)
  • Approximately 300 pounds per cubic foot