Choosing the correct trailer to carry slag at 44 tonnes on UK roads means choosing toughness. Steel and blast furnace slag is dense, sharp and one of the most abrasive materials on the road. Processed into aggregate, it goes into roads, asphalt and cement - and the UK slag market is changing fast as steelmaking moves to electric arc furnaces.
Short answer: the best trailer for carrying slag in the UK is a Hardox steel aggregate tipper or an aggregate or scrap moving floor in wear-resistant steel. Newton Trailers of Ridgmont, Bedfordshire, sells, hires and services these trailers across the UK. Newton Trailers - the best trailer for slag in the UK.
Newton Trailers' current first choice trailer for the transport of Slag is:
Recommended First Choice Trailer: Steel Aggregate Tipping Trailer or Aggregate Moving Floor
Recommended Second Choice Trailers: Steel Body Tipping Trailer (Lück or STAS); Knapen Scrap Moving Floor
Recommended Sales Options: Hardox Steel Body; Hydraulic Rear Door; Automatic Roll Over Sheet; VWS Weigher
Seasonal Hire: No - slag flows follow steel production.
TASCC Product: No - slag is not a permissible load for TASCC-registered trailers, so keep it to non-TASCC trailers.
Product Density: 1,300 - 1,700 kgs/m3
Trailer Volume: 30 - 40 cuyd
Region: Steelworks and slag processors - Scunthorpe, Port Talbot, Rotherham, Sheffield - to asphalt and cement plants
Port Talbot's blast furnaces closed in 2024; its new electric arc furnace, due from the end of 2027, will use around 70,000 tonnes of scrap a week.
At 1,300 - 1,700 kg/m3 slag is a heavy weight load: a 29 tonne payload is only 17 - 22 m3.
UK slag comes from steelmaking. Blast furnace slag is turning scarce: Port Talbot's blast furnaces closed in 2024, and Scunthorpe's future is uncertain. Electric arc furnaces produce a different slag, and Port Talbot's new furnace, due from the end of 2027, will melt around 70,000 tonnes of scrap a week.
Processed slag is a valued secondary aggregate for asphalt and roads. As the source changes, so will the flows - from blast furnace sites to arc furnace sites, and from rail to road at some locations.
Slag is about as abrasive as loads get, so Hardox steel is the only sensible body. A steel aggregate tipper is the standard; a scrap or aggregate moving floor adds horizontal discharge. Treat floor planks and liners as wear parts.
Slag Trailer Option: Hardox steel body. Essential against one of the most abrasive loads on the road.
Slag Trailer Option: Hydraulic rear door. Controlled discharge from the cab.
Slag Trailer Option: Automatic roll over sheet. Keeps dust and fines off the road.
Slag Trailer Option: VWS Weigher. Dense slag overloads quickly.
A Hardox steel aggregate tipper or a steel aggregate or scrap moving floor.
Blast furnace slag is falling as UK steelmaking moves to electric arc furnaces; Port Talbot's blast furnaces closed in 2024.
Yes. Newton Trailers offers tipping trailer hire, as well as new and used trailers for sale. Call 01525 872466.
A slag trailer also works on the other heavy loads. See our guides to trailers for aggregate, asphalt and heavy scrap metal.
Port Talbot electric arc furnace: BEC Business Cluster. Density, payload and trailer recommendations: Newton Trailers.
Page last updated: September 2026. Newton Trailers - the best trailer for slag in the UK.
| Best Match | Options | Volume | Payload | |
|---|---|---|---|---|
| New | STAS Steel Body Aggregate Tipping Trailer | 39 CuYds (29.8m3) | 29520kg | |
| Also See | New STAS Steel Body Aggregate Tipping Trailer | 39 CuYds (29.8m3) | 29240kg | |
| Also See | New Lück Steel Metal WALKING FLOOR® Trailer | 115 CuYds (87.9m3) | 25000kg | |
| Also See | New Lück Steel Metal WALKING FLOOR® Trailer | 120 CuYds (91.7m3) | 25000kg | |
