Blasting media for stainless steel

What blasting media should you use for stainless steel?

The best blasting media for stainless steel depends mainly on the desired surface finish. If you want to clean or matt stainless steel while keeping the surface smooth and even, glass beads are usually a good choice. If you need stronger cleaning or deliberately want to roughen the surface, fine corundum may be more suitable.

For stainless steel, there are three main options available:

• Glass beads: for cleaning, matting and creating an even finish.
• Fine glass beads: for a finer and more controlled surface finish.
• Fine corundum: for more powerful cleaning and roughening of the surface.

Glass beads for cleaning and matting stainless steel

Glass beads are a popular blasting media for stainless steel when a clean and uniform finish is required. Because the beads have a rounded shape, they act less aggressively on the surface than sharp edged blasting media.

They are suitable for removing light contamination and for creating an even matt or satin finish on stainless steel.

If you are blasting a visible stainless steel component and the final appearance is important, glass beads are often the most suitable choice.

Fine glass beads for a precise surface finish

Fine glass beads have a similar gentle action to standard glass beads, but their smaller particle size allows for more precise and controlled blasting.

They are particularly suitable for smaller stainless steel parts, visible components and surfaces where a fine and consistent finish is important.

Not sure whether to choose standard or fine glass beads? Choose fine glass beads when you want greater control and a finer surface finish.

Fine corundum for more aggressive blasting

Corundum is much harder and more angular than glass beads. This gives it a stronger abrasive action and allows it to remove material more quickly.

Fine corundum is suitable when stubborn contamination needs to be removed or when the stainless steel surface needs to be deliberately roughened before further treatment.

This can be useful when preparing stainless steel for a coating or another surface treatment where a rougher profile is required.

Because corundum is more aggressive, always test it on a small area first. Start with a low blasting pressure and check the result before treating the entire surface.

Which blasting media is best for your application?

The correct blasting media mainly depends on what you want to achieve with the stainless steel surface.

• Cleaning stainless steel: choose glass beads when you want to remove light contamination while maintaining an even finish.
• Matting stainless steel: glass beads are suitable for creating a uniform matt or satin appearance.
• Creating a very fine finish: fine glass beads provide more control and a finer surface structure.
• Removing stubborn contamination: fine corundum provides a stronger abrasive action.
• Roughening stainless steel: fine corundum is suitable when you deliberately need a rougher surface for further treatment.

Why can you not use any blasting media on stainless steel?

Stainless steel requires extra care during abrasive blasting. One of the most important things to avoid is contamination with particles from ordinary carbon steel.

Small iron or steel particles can become embedded in or remain on the stainless steel surface during blasting. These particles can later start to rust, causing rust spots to appear even though the stainless steel itself is not the original cause of the corrosion.

For this reason, always use clean blasting media that is suitable for stainless steel.

Blasting media that has previously been used on ordinary steel may contain metal particles. Reusing the same media on stainless steel can transfer these particles to the surface. If you regularly blast both stainless steel and carbon steel, keep the blasting media separate.

What particle size should you use for stainless steel?

The type of abrasive is not the only factor that determines the final result. Particle size also has a major influence on the surface finish.

A finer particle size generally gives you more control and produces a finer finish. A larger or more angular abrasive removes material faster and creates a rougher surface profile.

For visible stainless steel components where appearance matters, a finer blasting media is usually preferred. If the surface needs to be roughened before applying a coating or another treatment, a more aggressive abrasive may be the better choice.

Sandblasting stainless steel with glass beads

Glass bead blasting is commonly used when stainless steel needs an even matt or satin finish. The rounded glass beads treat the surface more gently than angular abrasives and are therefore well suited to applications where appearance is important.

The final finish depends on the particle size, blasting pressure, distance between the nozzle and the workpiece and the amount of time the surface is blasted.

Fine glass beads can be used when an even more refined finish is required.

How do you avoid damaging stainless steel when sandblasting?

If you are unsure how a blasting media will affect the surface, always start by testing a small area.

Begin with a relatively low blasting pressure and increase it only when necessary. Keep the blasting gun moving evenly and avoid directing the abrasive stream at the same spot for too long.

The distance between the nozzle and the stainless steel also affects the blasting action. A shorter distance and higher pressure create a more aggressive effect on the surface.

Starting carefully gives you more control over the final result and helps prevent unnecessary damage to the workpiece.

Can you remove contamination from stainless steel by sandblasting?

Yes. The correct blasting media can be used to remove various types of contamination from stainless steel. The best abrasive depends on how stubborn the contamination is and what surface finish you want afterwards.

For lighter cleaning and a neat finish, glass beads are usually suitable. If more abrasive power is required, fine corundum may be a better option.

Always consider the desired final surface before choosing the most aggressive abrasive. Removing contamination is only part of the job. The blasting media also determines how the stainless steel will look and feel afterwards.

Blasting media for other materials

Different materials require different types of blasting media. If you are working with ordinary steel or another metal surface, read our guide to blasting media for metal.

Do you want to remove paint, varnish, dirt or other coatings from a wooden surface? Read more about choosing the correct blasting media for wood.

For sandblasting cabinets, portable sandblasters, accessories and other equipment, view our complete range for sandblasting.

Buy blasting media for stainless steel

At George at Work you can find different blasting media for cleaning, matting and roughening stainless steel. Choose the abrasive based on the surface finish you want to achieve and how much abrasive action your application requires.

For a clean and uniform finish, glass beads or fine glass beads are generally the most suitable options. If you need stronger cleaning or deliberately want to create a rougher surface, fine corundum may be the better choice.

Not sure which blasting media for stainless steel you need? Tell us which stainless steel part you want to blast, what you want to remove and which result you want to achieve. Our product specialists will be happy to help you choose the right blasting media for your application.