Low carbon steel shots are produced using selected low carbon, sulphur and phospohorus content scrap. After the melting process, steel shots are produced by melting in the induction furnaces, at about 1600-1650 °C, which are automized, followed by quenching process, are crack free with a bainitic microstructure. Since high carbon steel shots can be produced by using all kinds of scrap, the shots produced are brittle, hard and susceptible to surface cracks after heat treatment. Further application of heat treatment for removing the martensitic structure will extend the surface cracks.
Why low carbon?

Low carbon and high manganese steel shots are resistant to impact. The impacts are transferred homogenously throughout the steel shot.

In blasting operations, low carbon steel shots become smaller due to wear, peel like an onion in small layers 80% of their lifetime. Some grains may fracture to smaller pieces due to material fatigue. It is obvious that less amount of cracking into smaller pieces will cause less wear in the lining of the blasting machine and wheel blades.

High carbon steel shots quickly break into bigger and sharper edged particles because of their structure with quench cracks. This results in higher wear of the blasting machine parts and higher cost of operation.

No surface cracks are observed on low carbon steel shots, compared to high carbon shots. Surface cracks, generally filled with slag, will considerably reduce the lifetime of shots.

Low carbon steel shot will harden up to 46-49 HRC during the first cycles in the blasting machine due to its manganese content. This hardening during operation will give better cleaning efficiency to low carbon shots

Thanks to all these properties, the service life of Tosgelik Granul low carbon steel shot has 20% longer life than high carbon steel shot.
Tosgelik Granul low carbon steel shot, with its long life and high hardness, shows excellent performance in removal of sand, scale and rust, deburring, surface preparation and shot peening processes. It is ideal for the use in foundries, forges, ironworks, rolling mills, machine building shops, in steel industry, in automobile and aircraft industries as well as in structural steel industry.