Shot Blast

Production of various steel shot sizes, with guaranteed quality, competitive pricing, and fast nationwide delivery.

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What is

What is Steel Shot Blast?

Steel shot (Shot Blast) is a type of spherical steel particle used in shot blasting machines for cleaning, derusting, surface preparation, and enhancing the durability of metal components. These shots are typically made from high-carbon or low-carbon steel and, due to their high hardness, long lifespan, and ability to withstand continuous impact, are considered the best option for blasting operations.

Production

How is shot blast steel made?

Shot blast steel is typically produced using two main methods, each with its own advantages and applications. The casting method (Cast Steel Shot Production) is the most common technique for manufacturing shot blast steel.

1

Steel Melting

Steel (usually high-carbon steel) is melted in an induction furnace or electric arc furnace at approximately 1500°C.

2

Drop Casting

The molten steel passes through a nozzle and falls as small droplets in the casting tower. During the fall, the droplets become rounded and form spherical shapes.

3

Collection and Cooling

The still-hot steel shots are cooled in a water bath or by air.

4

Heat Treatment

Heat treatment (Hardening & Tempering) is performed to achieve the required hardness: the shots are hardened and then tempered to prevent brittleness.

5

Separation and Grading

Using vibrating and screening machines, the shots are separated according to standard sizes such as S-330, S-280, S-70, and others.

6

Quality Control

Cracked, oval, or defective shots are removed using magnetic separators and industrial cameras.

Applications

Where is steel shot blast used?

Steel shot is a highly versatile industrial abrasive used in cleaning, surface preparation, strengthening, and derusting processes.

1) Cleaning Metal Surfaces
Steel shot is used in shot blasting to clean various metal parts. The rapid and continuous impact of the shots removes contaminants, oil, oxide scales, and effects of heat treatment completely. This method is ideal for cleaning castings and post-welded components.

2) Rust Removal
One of the main applications of steel shot is derusting steel surfaces. The uniform, continuous impacts of the shots remove rust layers from sheets, I-beams, profiles, and automotive parts. This method is faster and more effective than chemical alternatives.

3) Surface Preparation for Coating and Painting
Before applying industrial paint, epoxy, powder coating, or galvanizing, the metal surface must be clean and roughened. Steel shot creates an appropriate surface profile, significantly improving paint adhesion. This results in longer-lasting coatings and ensures the surface is ready for protective layers.

4) Shot Peening for Strengthening
In shot peening, steel shots strike the component’s surface under high pressure, generating beneficial compressive stresses. These stresses enhance fatigue resistance and extend the life of sensitive parts such as springs, shafts, turbine blades, and gears. This method is widely used in automotive, aerospace, and military industries.

5) Preparation for Thermal Coatings
Before applying hard coatings like tungsten carbide or wear-resistant layers, the surface must be rough and active. Steel shot is the best tool to create a surface with high adhesion and a proper profile for thermal spraying, ensuring the final coating quality.

6) Steel and Foundry Industry
In foundries, steel shot is used to remove residual sand, scale, and debris from cast iron and steel parts. It is also applied to clean billets and slabs before further production stages, improving the final surface quality of cast components.

7) Shipbuilding and Marine Structures
Due to constant exposure to moisture and salt, rust is severe in marine environments. Steel shot is used to clean ship hulls, tanks, and coastal infrastructure, preparing surfaces for anti-corrosion coatings and extending the lifespan of marine structures.

8) Metal Structures and Industrial Sheds
In the construction of sheds and metal structures, shot blasting with steel shot is essential before painting. It removes all contaminants and rust, preparing beams, columns, and sheets for epoxy or industrial paints, resulting in stronger and cleaner structures.

9) Industrial Equipment and Components
Industrial components such as machinery frames, forged parts, turbine blades, and heavy-duty pieces require precise cleaning and preparation. Steel shot, due to its durability and hardness, is the best choice for cleaning these tough components, improving performance and extending equipment life.

FAQ

Frequently Asked Questions

What is shot blast steel and what is it used for?

Shot blast steel (Steel Shot) consists of spherical or angular steel pellets used in shot blasting machines for cleaning, derusting, surface preparation, increasing metal strength, and creating the proper roughness before painting or coating.

Shot (spherical): Suitable for polishing, general cleaning, and surface strengthening (shot peening).

Grit (angular): Used for creating higher surface roughness, more aggressive removal of contaminants, and surface preparation before industrial coatings.

The choice of shot type depends on the surface condition, the required roughness level, and the purpose of the operation.

The selection of shot size depends on three factors:

  • Material and thickness of the workpiece

  • Required level of cleanliness or surface roughness

  • Type of shot blasting machine

Generally, larger shots create higher impact force and greater roughness, while smaller shots are more suitable for delicate operations and sensitive surfaces.

The service life of shot blast steel depends on the quality of raw materials, the type of application, and the operating conditions of the equipment. High-quality steel shot can withstand thousands of shot blasting cycles without breaking. Proper machine maintenance and removal of broken particles significantly extend its useful life.

If the shot size, projection speed, and blasting angle are selected correctly, no damage will be caused to the surface. In fact, in many industries, shot peening with steel shots increases the fatigue resistance of components. Problems arise only when inappropriate shot is used or when the blasting equipment is improperly adjusted.