Mild Steel Box Section

£7.39 inc VAT£6.16 ex VAT


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The Mild Steel Box Section, or square tube, features a square hollow section suited to a wide range of different industry uses including the construction of lightweight frames, structural projects, security uses, fabrication and transport. Available in the A & B lengths, thickness and the quantity of your choice. Simply use our price calculator to input your dimensions to receive a free and instant quote. Our mild steel box section will be delivered pre-cut to your required dimensions.

Grade 43a mild steel benefits from many of the qualities of other forms of steel, but its lower carbon content makes it far easier to form and therefore more versatile.

Mild steel is a type of carbon steel that contains a lower carbon content than other steel alternatives. This low carbon content and the exclusion of any alloys makes it easier to work and form than stronger forms of steel. Our Mild Steel Box Section is highly receptive to cutting, drilling and welding, it complements the variety of projects box section is commonly used for.

Combining the resilience of the box structure with the strength, formability and versatility of steel; it offers a very reliable and long lasting finished product which is also widely recycled after use.

  • Mild Steel Box Section cut to your size requirements
  • Iron grade 43a
  • 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 187 reviewsShow all reviews


Got exactly what i ordered.Reviewed by Chris.freeborn on 07 Apr 2022

Ready to use.


Quick and easyReviewed by Neilhoare on 23 Mar 2022

Just what I needed


good serviceReviewed by Da.parks on 18 Mar 2022

good service


Happy with serviceReviewed by Ermal0902 on 23 Feb 2022

Happy with the service


Excellent ServiceReviewed by Martin.gostick on 17 Feb 2022

Steel exactly as ordered, delivered as specified. Staff very help when I rang with a query.

Mild steel box section is commonly used in the construction of:

  • Frames
  • Strong semi-permanent structures
  • Fences
  • Trailers

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.