Stainless Steel Box & Rectangle Section – Square Hollow Section, 6m Lengths & Cut to Size, Stainless Steel Tube for Handrails & Fabrication
Stainless Steel Box & Rectangle Section – Square Hollow Section, 6m Lengths & Cut to Size, Stainless Steel Tube for Handrails & Fabrication
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304 grade stainless steel box section and rectangular hollow section — also called stainless square tube or stainless hollow section — in 6m lengths or cut to size on request. Grade 304 (EN 1.4301) gives excellent corrosion resistance for indoor, architectural and food-industry applications without painting or coating.
Used for balustrade posts and frames, architectural structures, shopfitting, food and pharmaceutical equipment frames, marine fabrication, external handrails, chemical plant structures and any application where corrosion resistance and a clean appearance matter.
Grade 304 Stainless Steel
304 is the most widely used austenitic stainless steel. It resists corrosion in most indoor and sheltered outdoor environments, is non-magnetic in the annealed condition, and has excellent weldability and formability. For coastal, marine or chloride-exposed applications, grade 316 is recommended - see our 304 vs 316 stainless steel guide.
Stainless Box Section Sizes & Weight Chart
304 stainless steel box section and rectangular hollow section size chart with approximate weight per metre. All sizes in 6m lengths or cut to size.
| Size | Profile | Approx. weight (kg/m) |
|---|---|---|
| 20 x 20 x 1.5mm | Square (SHS) | 0.89 |
| 25 x 25 x 1.5mm | Square (SHS) | 1.13 |
| 30 x 30 x 1.5mm | Square (SHS) | 1.37 |
| 40 x 40 x 1.5mm | Square (SHS) | 1.85 |
| 50 x 50 x 1.5mm | Square (SHS) | 2.33 |
| 50 x 25 x 1.5mm | Rectangular (RHS) | 1.73 |
| 80 x 40 x 2mm | Rectangular (RHS) | 3.71 |
Popular stainless steel box section sizes include 20x20, 25x25, 40x40 and 50x50 box section, plus 50x25 and 80x40 rectangular hollow section. Weights are approximate, calculated from the section dimensions at 8,000 kg/m³ — for an exact figure use our metal weight calculator.
Rackerman is a UK metal supplier: buy 304 stainless steel box section — also known as stainless square tube, stainless hollow section or stainless SHS/RHS — online with fast mainland UK delivery and cut-to-size service, a convenient alternative to a local metal stockholder near you.
Fabrication
304 stainless welds with TIG or MIG using 308L filler rod and argon shielding gas. Purge the tube interior during welding to prevent oxidation discolouration. Cut with a stainless-rated abrasive disc, bandsaw or plasma cutter. Passivate or pickle weld areas to restore the corrosion-resistant oxide layer.
Related Stainless Sections
See the rest of our 304/316 stainless range: round tube, round bar, square bar, equal angle and sheet. Work out weights with our metal weight calculator.
Compare Our Full Box & Rectangle Section Range
Need a different material? Match the section to your job: S235 square box section (SHS), 3m box section, rectangular hollow section (RHS), ERW box & rectangle, galvanised box section and 6063 aluminium box section. Browse the full hollow section collection.
Related Guides
Read more in our guides: 304 vs 316 stainless steel, galvanised vs stainless steel and the metal weight calculator.
Delivery Information
Lead times are currently 3-5 working days to mainland UK. Sections are supplied in 6m lengths, so suitable delivery access is required and offloading assistance may be needed on arrival.
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FREQUENTLY ASKED QUESTIONS
Q: What length is the 304 stainless steel box section?
A: Each section comes in a standard 6-metre length, ideal for large-scale or continuous fabrication work.
Q: Can you cut the stainless steel box section to size?
A: Yes, we offer a cut-to-size service to meet your exact project requirements—just let us know your specifications when ordering.
Q: What is 304 stainless steel, and why is it used?
A: 304 is the most commonly used austenitic stainless steel, known for its high corrosion resistance, durability, and excellent formability. It’s ideal for structural, architectural, and hygienic applications.
Q: Is this stainless steel suitable for outdoor or marine use?
A: Yes, 304 stainless steel performs well in outdoor environments and offers good resistance to moisture and mild corrosion. For harsh marine exposure, 316 stainless steel may be recommended.
Q: Can I weld or machine the box section?
A: Absolutely. 304 stainless steel offers excellent weldability and machinability, making it suitable for a wide range of fabrication processes.
Q: What are typical uses for 304 stainless steel box section?
A: Common applications include architectural framing, handrails, supports, hygienic environments (like kitchens or labs), marine fixtures, and decorative structures.
Q: Do you offer trade pricing or volume discounts?
A: Yes, we provide bulk discounts and trade pricing for larger orders. Please contact us directly for a tailored quote.
MONEY BACK GUARANTEE
Here at Rackerman, we take customer satisfaction very seriously. If you are unsatisfied with the quality of your product, please email us info@rackerman.co.uk or give us a call: 01665 497513 and we will make it right.
SHIPPING
It should take no longer than 1-2 business day to process your order, then 3-5 working days (5-10 working days on RSJs) to then receive your order from us after dispatch.
If you haven't received your items in this time frame, please contact us.
RETURNS
If you are unsatisfied with your purchase, that's completely fine! We offer a 30 day money back guarantee to all customers, no questions asked! Please contact us to arrange a return.