Square E.R.W Box

£4.19 inc VAT£3.49 ex VAT


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ERW steel box is so called because of the electronic resistance welding method employed in its manufacture, which uses a combination of heat and pressure resulting in a very consistent and strong forged weld seam.

However it is employed, mild steel square ERW box offers a terrific level of performance and reliability, and it is also favoured as a very ‘green’ option as it is widely recycled.

Square tube is a popular choice for the construction of space frames and strong yet lightweight structures such as kit car chassis’. Mild steel square box benefits from the strength and low weight of this structure and combines the formability and versatility that the lower carbon content of mild steel affords. This results in a square tube which is extremely easy to work with and one which can be cut, drilled and welded to suit any requirement.

  • Highly reliable and strong
  • Suitable for a range of construction applications
  • Delivered cut to length

Our square ERW box is delivered pre-cut to your desired dimensions, simply input the size of mild steel tube you require into our price calculator along with the number of lengths you require.

Please note: Our current machines operate to a tolerance of +/- 2mm. Please enter your desired dimensions below to the nearest whole mm.

Customer Reviews4.95 4.9/5 Based on 19 reviewsShow all reviews


Just the job.Reviewed by Sid.painter57 on 30 Oct 2020

The 30mm square tube was just what was needed as the external and internal dimensions were critical. Componets had to move inside as well as outside. A well made and finished product.


Just the job.Reviewed by Sid.painter57 on 30 Oct 2020

The 30mm square tube was just what was needed as the external and internal dimensions were critical. Componets had to move inside as well as outside. A well made and finished product.


50 x 25 x 1.5 Box SectionReviewed by Gk.aim on 09 Sep 2020

A particularly useful section which is both strong and light in weight. Great selection of sizes available, cut to length as needed and delivered quickly. What's not to like ! Thank you Austen Knapman.


Good quality steelReviewed by Tysonl93 on 13 Aug 2020

Easy to weld cut easily in half to make a channel


Speedy deliveryReviewed by Andyham1974 on 22 Jul 2020

I needed a few bits to repair a damaged gazebo, a quick search lead to this company.very easy to find the sizes I needed, quick and simple ordering system and very speedy delivery. I will use this company again.

A very supportive and strong material, square E.R.W tube is perfect for a range of structural construction applications including:

  • Cages
  • Frames
  • Trailers
  • Fences and supporting posts

Delivery Rates & Policy

Please find our delivery rates below. The delivery price will be automatically calculated as you add items to your cart.

UK Mainland

1 - 20kg£12.50
20 - 50kg£16.50
Orders Over £80 (ex VAT)FREE

Industrial Scotland

1 - 20kg£12.80
20 - 50kg£16.60
Orders Over £150FREE

Scottish Highlands & Islands

1 - 20kg£39.50
20 - 50kg£43.30

Universal Beams & Channels

We can only deliver Universal Beams and Universal Channels to selected postcodes in the TQ, EX, PL and TR areas. A shipping charge of £15 applies to all orders in this category. Collect in person is also available for those who live locally.

What days will the courier delivery?
Our courier will deliver between Monday and Friday.

How quickly will my order arrive?
The majority of orders will arrive within a maximum of five working days. However, sometimes there may be a delay but we will phone you if this is going to be the case.

Can I collect my order in person?
Yes, during the checkout process you will be given the option of selecting 'collect in person' which will remove all delivery charges. 

Will I be able to track the status of my order?
Yes, you will be emailed the tracking number when your order is dispatched.

How will my order be delivered?
For deliveries local to us we use our own fleet of vehicles. For orders further afield we use a range of couriers, depending on the size of your order we select a courier to suit.

Will I need to sign for my order?
Yes, a signature is required upon delivery.

Special delivery instructions
If you have any special delivery instructions, please include these in the 'special delivery' section at the checkout.

Delivery Zones
As stated above the price of delivery varies depending on the postcode of the delivery address. In some rare cases concerning Scottish Highlands & Islands the stated delivery charge may not be enough to cover the shipping and we reserve the right to request this additional amount before shipment. Should you decide you do not wish to pay this additional cost we will refund the total cost of your order within 24hrs.

We are currently experiencing issues with deliveries in Wales, primarily to LL postcodes. Please contact us first if you wish to place an order for delivery to this area.

I have a query regarding delivery?
If you have any queries regarding delivery please ring our team on 01803 664020. We shall make every effort to contact you if we cannot deliver your order within the specified period and we will let you know of the expected time.