DELTA

Is RUST FREE Stainless Steel GRIT with high durability and good aggressive blasting action.

It is ANGULAR in shape, and maintains its shape during the blasting process.

It is a cost effective REPLACEMENT product for Oxide blasting operations, especially where blasting is undertaken in a blast room.

The MAIN APPLICATIONS are the Cleaning, De-burring, Surface Preparation and Finishing of:

  • Aluminium Castings, Forgings and Extrusions.
  • Natural Stone and Concrete - Surface Texturing.
  • Shot Blasting of Non-Ferrous Metals and Alloys.
  • Zinc Pressure Die Castings.
  • Stainless Steel Castings and Forgings.
  • Stainless Steel Structures.

DESCALING OF STEEL - is an acid pickling replacement.

Product Specification Sheet

Stainless Grit - Sigma Delta Grit

DELTA Stainless Grit is specially processed to obtain a Hardness and Microstructure that is consistent with aggressive cleaning/blasting action while at the same time obtaining a high level of toughness and durability.
This process of manufacture ensures a highly recyclable product that is cost effective when compared to alternative materials and to products like Aluminum Oxide and Garnet.

Chemical Composition
Min % Max %
Carbon 1.95 2.20%
Chrome 27% 30 %
Nickle 0.00 0.5%
Silicon 1.80 2.5%
Manganese 0.70 1.40%
Hardness
After Work Hardening (In Service) +- 60 HRc
Microstructure
Martensitic with a network of Chrome Carbides
Sieve Sizes GRADES
Sieve No. mm Spherical Delta 10 Delta 12 Delta 14 Delta 16 Delta 18 Delta 25 Delta 40 Delta 50 Delta 80 Delta 120
7 2.80 All Pass
8 2.36 All Pass
10 2.00 All Pass
12 1.70 90% Min All Pass
14 1.40 90% Min All Pass
16 1.18 90% Min All Pass
18 1.00 90% Min All Pass
10 0.850
25 0.710 90% Min All Pass
30 0.600
40 0.425 90% Min All Pass
50 0.300 90% Min
60 0.250 All Pass
80 0.180 90% Min
0.075 90% Min
0.04 90% Min

Sigma Delta Grit & Cr Grit

  • No Ferrous Contamination
  • Rust Free Blasting
  • Remains sharp
  • Retains cutting Edge
  • Allows control of surface profile
  • Cost effective alternative to mineral Abrasives
  • Significant reduction in stock and logistics
  • Various Packaging options available
  • Enviromentaly Friendly
  • Virtually no dust during blasting.