Shot Blasting Cape Town uses round steel shot, thrown by a wheel machine or blown in a blast room, to clean and prepare metal. Describe the job once and compare quotes from contractors with the right equipment.
- For fabricators, foundries, engineering works and owners of steel items.
- Shot and angular grit do different things. The right one depends on the finish needed.
Describe your steel once and compare shot blasting quotes.
Get Shot Blasting QuotesShot Versus Angular Grit
| Steel shot | Angular grit | |
|---|---|---|
| Shape | Round | Sharp-edged |
| What it does | Hammers the surface: cleans, removes scale, peens | Cuts the surface: strips coatings, creates a profile |
| Finish | Smoother, rounded texture | Rougher anchor profile for paint |
| Used for | Castings, forgings, springs, descaling steel | Rusty or painted steel before protective coatings |
Many blast rooms mix shot and steel grit to balance cleaning speed and profile. Ask which mix the contractor uses and what profile it leaves.
Typical Applications
- Removing mill scale and rust from new steel sections and plate.
- Cleaning sand and scale off castings and forgings.
- Preparing fabrications for paint, galvanising or powder coating.
- Cleaning trailer chassis, wheel rims and heavy steel parts.
- Shot peening of springs and stressed parts, which is a separate, specified process.
What the Process Involves
- Degrease the steel. Shot does not remove oil.
- Load into a wheel blaster or blast room. Large steel goes through on a conveyor or trolley.
- Blast to the agreed cleanliness and profile.
- Remove dust and trapped shot from pockets and hollow sections.
- Prime or coat promptly.
Limitations
- Steel shot is for steel and iron. It is too aggressive for aluminium, thin sheet and soft metals.
- Wheel machines suit regular shapes. Very large or awkward items may need a blast room or on-site grit blasting.
- Shot peening to a specification needs controlled intensity and coverage, not general cleaning.
- Hollow sections trap shot and need draining or plugging.
Shot Blasting Prices
| Item | Ballpark price |
|---|---|
| Abrasive blasting for surface preparation | R80 - R150 per m² |
| Powder coating mild steel beams and plates after blasting | About R600 per m² |
| Powder coating galvanised steel | About R420 per m² |
| Protective coating system on steel | R700 - R1,650 per m² |
| Shot blasting by weight or production run | Quoted per job - no reliable published rate |
Ballpark figures, not quotations. Compiled from price guides and price lists published on South African websites (published between April 2025 and January 2026, plus one undated powder-coating price list), checked 13 October 2026 and rounded. Most are national or Gauteng guides, so Cape Town quotes can differ. Unless a row says so, the sources do not state whether VAT is included, so confirm VAT on every quote. Photos, an inspection and a written quote set the actual price.
What Affects a Shot Blasting Quote
- Volume, weight or square metres, and whether it is a once-off or a regular run.
- Size and shape: whether it fits the wheel machine or needs a blast room.
- Starting condition: mill scale only, or heavy rust and paint.
- Required cleanliness and profile.
- Transport, handling and coating after blasting.
What to Send With Your Request
- What the items are and the steel grade if known.
- Sizes, weights or quantities.
- Photos of the condition.
- The coating or finish that follows.
For other methods and the full list of services, see Sandblasting Cape Town.
Frequently Asked Questions
Is shot blasting the same as sandblasting?
No. Both are abrasive blasting, but shot blasting uses round steel shot, usually in a wheel machine or blast room. Sandblasting usually means blowing angular grit through a nozzle.
Can aluminium be shot blasted?
Steel shot is generally too aggressive for aluminium and can embed iron that causes corrosion. Glass bead, aluminium oxide or wet blasting are more common for aluminium.
Does shot blasting leave a good surface for paint?
Shot leaves a smoother, peened surface. Many coatings need the sharper profile from grit, so blast rooms often use a shot and grit mix. Check the coating specification.
Can shot blasting be done on-site?
Wheel blasting is a machine process in a facility. Portable shot blasters exist for flat steel decks and concrete floors. Most on-site steel work uses expendable grit.
What is shot peening?
A controlled process that hits the surface with shot to add compressive stress and improve fatigue life. It is specified separately from cleaning.
Related Services
Sandblasting Cape Town is a free quote-comparison service. Work is assessed, quoted and carried out by independent contractors, and your agreement is with the contractor you appoint. Ask each one for a written quote, what is and is not included, proof of insurance and the payment terms before paying anything.
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