Square E.R.W Steel Box

£2.92 inc VAT£2.43 ex VAT


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Our Cut To Size E.R.W Steel Box is a popular, lightweight and versatile metal box section for the construction of space frames and a range of other practical applications. Our square ERW box is delivered pre-cut to your exact dimensions. Simply input the size of the mild steel tube you need into our price calculator along with the number of lengths you require.

Square tube is a popular choice for the construction of space frames and strong yet lightweight structures such as kit car chassis. It can also be used in general construction and fabrications, transport, security grates, fences, cabinets, floor supports and many other commercial and domestic uses. 

Our ERW Steel Box is produced using a special electronic resistance welding method. This uses a combination of heat and pressure, resulting in a very consistent and strong forged subtle weld seam that exists between welded steel and seamless materials. Created by combining heat and pressure to join the steel, you’ll receive a durable end product that is highly formable and can be effectively cut, drilled and welded to suit most requirements. ERW steel box is therefore smoother and more consistent in surface texture without an obvious weld seam. 

Mild steel square box is a high strength and low weight product, combining the formability, versatility and workability that mild steel is known for. The lower carbon content of mild steel will give you a product that is very easy to work with and handle and can be cut, drilled and welded to suit any project requirements.

  • Cut To Size E.R.W Mild Steel Box
  • Suitable for a range of construction applications
  • Delivered cut to size
  • Resilient and strong steel box lengths
  • Easily formed
  • Strong and durable yet highly workable 
  • Easy to work, drill, cut to size and weld
  • Widely recyclable
  • Lower carbon content

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

Customer Reviews5.05 5.0/5 Based on 20 reviewsShow all reviews


I love itReviewed by Andy.ainsworth65 on 01 Apr 2022

I love it


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

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

Orders under £150 (ex VAT)£17.50
Orders Over £150 (ex VAT)FREE

Industrial Scotland

Orders under £150 (ex VAT)£17.50
Orders Over £150 (ex VAT)FREE

Scottish Highlands & Islands

All orders£41.50

Universal Beams & Channels and Parallel Flange Channel

We can only deliver Universal Beams, Universal Channels and Parallel Flange Channels to selected postcodes in the TQ, EX, PL and TR areas. A shipping charge of £17.50 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.