{"id":15624,"date":"2022-07-20T14:24:07","date_gmt":"2022-07-20T14:24:07","guid":{"rendered":"https:\/\/www.smetals.co.uk\/?post_type=product&#038;p=15624"},"modified":"2026-07-09T15:22:41","modified_gmt":"2026-07-09T15:22:41","slug":"30mm-x-30mm-x-3mm-mild-steel-box-section-square-steel-tube","status":"publish","type":"product","link":"https:\/\/www.smetals.co.uk\/product\/30mm-x-30mm-x-3mm-mild-steel-box-section-square-steel-tube\/","title":{"rendered":"30mm x 30mm x 3mm Mild Steel Box Section Square Steel Tube"},"content":{"rendered":"<h2>30 x 3mm Square Steel Tube<\/h2>\n<p>The Speciality Metals Company is one of the leading suppliers of square steel tube box section in the United Kingdom. Additionally, in addition to stocking only the best products, we provide the most helpful customer service by providing bespoke cutting and fast shipping.<\/p>\n<p>Box sections, also known as mild steel hollow sections or ERW tubes, are widely used in a variety of applications. The durability of this material permits it to be used for a wide range of applications, including traffic signs, pipeline construction, automobile repair and as a structural steel.<\/p>\n<p>When it comes to reliable and affordable construction materials, you can&#8217;t go wrong with the 30mm x 30mm x 3mm Mild Steel Box Section square steel tube by Speciality Metals. These steel tubes come in various lengths and offer excellent welding, forming, bending and machining abilities, making them a versatile option for a variety of applications. What&#8217;s more, they are highly durable and recyclable, meaning you can make the most of your investment while minimising your environmental impact. Whether you are a seasoned contractor or a DIY enthusiast, this square steel tube is an excellent choice for your next project.<\/p>\n<h2>Mild Steel<\/h2>\n<p>Mild steel square tube box section is a quality strong metal product. However it is not rust proof and may do so over time. Please use galvanised or stainless steel if you need resistance to rust. If this metal tube does show signs off rust then simply get this off with WD40 or fine sanding.<\/p>\n<ul>\n<li><strong>Bending &amp; Forming \u2013 Fair. You could only bend this tubing with bending tools but not by hand<\/strong><\/li>\n<li><strong>Corrosion Resistance \u2013 Poor. Mild steel is uncoated, so there is no additional protection against corrosion<\/strong><\/li>\n<li><strong>Machining &amp; Grinding \u2013 Good. Mild steel is the metal choice for many forms of machining and grinding, but stainless steel can also offer good results<\/strong><\/li>\n<li><strong>Welding \u2013 Excellent. You could easily weld with this tubing to suit your requirements<\/strong><\/li>\n<li><strong>Painting \u2013 Good. We suggest that a mild steel product is always used when a layer of paint needs to be applied. Galvanised and stainless steel will not take paint<\/strong><\/li>\n<li><strong>Wear Resistance \u2013 Fair. As there is no protective layer, we suggest stainless steel or galvanised steel if you require a stronger wear resistance<\/strong><\/li>\n<\/ul>\n<p>The grade of plain steel that we have available has mechanical properties that provide excellent machinability, formability and weldability. Mild steel can be welded and it is also suitable for painting. Mild steel is a magnetic grade of metal. Magnets will stick to this sheet but it is not itself a magnet.<\/p>\n<p>Key information:<\/p>\n<ul>\n<li><strong>Shape \u2013 Square Box Section<\/strong><\/li>\n<li><strong>Grade \u2013 S235JRH<\/strong><\/li>\n<li><strong>Hot or Cold Rolled \u2013 Cold Rolled<\/strong><\/li>\n<li><strong> Box Outer Size &#8211; 30 x 30<\/strong><strong>mm<\/strong><\/li>\n<li><strong>Wall Thickness \u2013 3mm<\/strong><\/li>\n<\/ul>\n<p>We also carry a wide range of mild steel\u00a0<a href=\"https:\/\/www.smetals.co.uk\/product-category\/sheet-metal\/mild-steel-plate-cut-to-size\/\" target=\"_blank\" rel=\"noopener noreferrer\">sheet metal<\/a>,\u00a0<a href=\"https:\/\/www.smetals.co.uk\/product\/mild-steel-angle-iron-steel-section-20-60mm-width-3-6mm-thick\/\" target=\"_blank\" rel=\"noopener noreferrer\">angle iron\u00a0<\/a>and\u00a0<a href=\"https:\/\/www.smetals.co.uk\/product\/mild-steel-flat-bar-steel-strip\/\" target=\"_blank\" rel=\"noopener noreferrer\">flat bar.<\/a><\/p>\n<h4>Why Choose Speciality Metals<\/h4>\n<p>Speciality Metals is known to be the United Kingdom\u2019s best up-and-coming small-quantity metal company.<\/p>\n<ul>\n<li><strong>FREE UK delivery on all orders<\/strong><\/li>\n<li><strong>Order dispatch within 24 hours of order<\/strong><\/li>\n<li><strong>Located in Warrington, UK which is the UK home of mesh and metals<\/strong><\/li>\n<li><strong>Our experienced staff are experts in the mesh market and care personally about your customer experience<\/strong><\/li>\n<\/ul>\n<p>Furthermore we stock a vast range of <a href=\"https:\/\/www.smetals.co.uk\/product-category\/tube\/\"><strong>round tube<\/strong><\/a> options that compliment our mesh range perfectly.<\/p>\n<p>Over 50,000 customers of Specialty Metals are provided with fast, friendly customer service every year. We\u2019re the place to try when you need metal of any shape and size. We\u2019re based in Warrington, UK. We pride ourselves on our rapid turnaround and a large range of options.<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<h4>FAQs About This Product<\/h4>\n<div class=\"group w-full text-gray-800 dark:text-gray-100 border-b border-black\/10 dark:border-gray-900\/50 bg-gray-50 dark:bg-[#444654]\">\n<div class=\"flex p-4 gap-4 text-base md:gap-6 md:max-w-2xl lg:max-w-[38rem] xl:max-w-3xl md:py-6 lg:px-0 m-auto\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<h2>What is the Weight of Mild Square Steel Tube?<\/h2>\n<p>The weight of a mild square steel tube is determined by its dimensions and the density of steel. Specifically, the weight can be calculated using the formula: Weight = Volume x Density. The volume of a tube is found by subtracting the inner volume from the outer volume, which accounts for the wall thickness. The typical density of mild steel ranges between 7,750 to 7,850 kg\/m\u00b3. However, for practical purposes and easier calculations, most engineers and professionals often use a standardised weight chart. These charts provide the weight per meter (or foot) for various sizes and thicknesses of square steel tubes. It&#8217;s important to note that these are approximate weights and actual weights can vary based on manufacturing tolerances and specific steel grades. When purchasing or using mild square steel tube for a project, it&#8217;s always advisable to refer to these charts or consult with suppliers for accurate weight information, especially when load-bearing capacity and transport are concerns.<\/p>\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap break-words\">\n<h2>How Does Square Steel Tube Strength Compare to Other Materials?<\/h2>\n<ol>\n<li>\n<p><strong>Compared to High-Carbon Steel and Alloys:<\/strong> High-carbon steels and alloy steels generally have superior tensile and yield strengths compared to mild steel. This is because the increased carbon content or added alloying elements provide more resistance to deformation. However, with this increased strength often comes decreased ductility, making some of these steels less malleable than mild steel.<\/p>\n<\/li>\n<li>\n<p><strong>Compared to Aluminum:<\/strong> Aluminum is significantly lighter than steel, which is one of its main advantages. In terms of strength-to-weight ratio, certain aluminum alloys can rival mild steel. However, in absolute terms of tensile and compressive strength, mild steel typically outperforms aluminum.<\/p>\n<\/li>\n<li>\n<p><strong>Compared to Wood:<\/strong> Steel, in general, has a far greater strength in both compression and tension compared to wood. While wood offers flexibility and can be more impact-resistant than brittle materials, mild steel surpasses it in load-bearing capacities and durability.<\/p>\n<\/li>\n<li>\n<p><strong>Compared to Plastics and Composites:<\/strong> Plastics vary widely in strength, but most common plastics are weaker than mild steel. Some advanced composites, such as carbon fiber-reinforced polymers, offer incredible strength-to-weight ratios that can surpass that of mild steel. However, these composites can be costly and may lack other beneficial properties of steel, such as resistance to high temperatures.<\/p>\n<\/li>\n<li>\n<p><strong>Compared to Concrete:<\/strong> While concrete excels in compressive strength, it&#8217;s weak in tensile strength. Steel, on the other hand, has high compressive and tensile strengths. This complementary nature is why steel and concrete are often used together in reinforced concrete, where steel bars or mesh provide tensile strength.<\/p>\n<\/li>\n<\/ol>\n<h2>Can Square Steel Tube be Used for Underground Applications?<\/h2>\n<p>Mild square steel tube can be utilised for underground applications, but it requires special considerations due to the environment it will be exposed to. Underground conditions present challenges like moisture, varying pH levels and other potentially corrosive agents, which can adversely affect the longevity and structural integrity of the steel.<\/p>\n<p>To mitigate these challenges, the tube usually undergoes protective treatments. Galvanisation is a common approach, where the steel is coated in a layer of zinc to protect it from corrosion. Another method is the application of special anti-corrosive paints or coatings that shield the steel from moisture and other corrosive elements.<\/p>\n<p>Moreover, for certain underground applications, a cathodic protection system might be implemented. This system uses anodes to draw away corrosive activity from the steel tube, extending its lifespan.<\/p>\n<p>While mild steel tubing offers strength and versatility, it&#8217;s crucial to ensure it is adequately protected when used underground. Without proper precautions, the tube can corrode quickly, leading to compromised structural integrity and potential failures. Thus, it&#8217;s always recommended to consult with experts and use the right protective measures for underground installations.<\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr \/>\n<p>&nbsp;<\/p>\n<p><em><strong>Check out our blog discussing <a href=\"https:\/\/www.smetals.co.uk\/mild-steel\/what-is-steel-box-section\/\">what is a steel box section<\/a>. It will prove a useful read to help you to make an informed decision on which material would work best for you.\u00a0<\/strong><\/em><\/p>\n<p><em><strong>We are also very proud of our ever expanding <a href=\"https:\/\/www.youtube.com\/@SpecialityMetals\">YouTube<\/a> channel.\u00a0<\/strong><\/em><\/p>\n<p><em><strong>Our goal for our blogs and help guides is to answer as many questions as possible to help to explain the possibilities of mesh to our customers.\u00a0 <a href=\"https:\/\/www.smetals.co.uk\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contact us<\/a>\u00a0today if you have any questions at all. We are always really keen to help in any way that we can.<\/strong><\/em><\/p>\n<p><em><strong>We are also very proud of our highly popular\u00a0<a href=\"https:\/\/www.ebay.co.uk\/itm\/303565335602?hash=item46ade76c32:g:52wAAOSwn35hVB0a&amp;amdata=enc%3AAQAHAAAA4FIP%2Fs70tTymwnOpAeuHgnIW%2FBAqQpqeR6HroKjmP36%2F%2FmVroq%2BkLuGAaqDDsbaUfezU7AgwWXqeZQmNQ9vUrKB0HvNfHGAMnrWAV3zaYwfaFXdb1ZPy%2BLRANrk4r34iTPERZMCKc4gz2jaHnnKfbWTRLl8wCNCXv1nnvzGyQjL%2BLPk7pduZ2rCUZMa%2B9dwXbeWE8%2FtoTTxof0z3NBEHraiWUdiMaSNaodMXjF7JoSwCP86rmynJf3BJud112BCDM1VXm9EmoScImhggISQRN41JtQY58AhlfjQsHHCoaCVv%7Ctkp%3ABFBMrKS3v79g\">eBay store<\/a>, check us out there too.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p><em><strong>\u00a3 MULTIBUY SAVINGS &#8211; Order 3 For 10% Off<\/strong><\/em><\/p>\n<p><em><strong>\u2714 Specialists In Rapid Shipments Of Any Size<\/strong><\/em><\/p>\n<p><em><strong>\u2714 FREE UK Delivery Included<\/strong><\/em><\/p>\n<p><em><strong>\u2714 Immediate Express Dispatch From Stock<\/strong><\/em><\/p>\n<p><em><strong>\u2714 Tracked Delivery with Order Updates<\/strong><\/em><\/p>\n<p><em><strong>\u2714 30-Day Returns Accepted<\/strong><\/em><\/p>\n<p><strong>@ \u260f \u00a0<a href=\"https:\/\/themeshcompany.com\/contact-us\/\"><em>Bespoke Cuts &amp; Longer Lengths Available<\/em><\/a>\u00a0<\/strong><\/p>\n<p>If you&#8217;re in the market for a durable and versatile steel tube, the 30mm x 30mm x 3mm Mild Steel Box Section Square Steel Tube by Speciality Metals is the perfect fit for you! Available in various lengths, this cost-effective option is not only great for your wallet but also for the environment as it is recyclable. With excellent welding, forming, bending and machining abilities, this square steel tube will get the job done no matter what the project entails.<\/p>\n<p>Don&#8217;t settle for a subpar steel tube, upgrade to the 30mm x 30mm x 3mm Mild Steel Box Section Square Steel Tube today!<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-20868 size-full\" src=\"https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet.jpg\" alt=\"\" width=\"1280\" height=\"224\" srcset=\"https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet.jpg 1280w, https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet-300x53.jpg 300w, https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet-1024x179.jpg 1024w, https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet-768x134.jpg 768w, https:\/\/www.smetals.co.uk\/wp-content\/uploads\/2022\/09\/Mild-Steel-Sheet-600x105.jpg 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n","protected":false},"featured_media":18849,"comment_status":"open","ping_status":"closed","template":"","meta":{"_exactmetrics_skip_tracking":false},"product_brand":[],"product_cat":[36,20],"product_tag":[52,37,23,51],"class_list":["post-15624","product","type-product","status-publish","has-post-thumbnail","product_cat-mild-steel-square-tube","product_cat-tube","product_tag-3mm-thick","product_tag-box-section","product_tag-mild-steel","product_tag-square-tube","first","instock","taxable","shipping-taxable","purchasable","product-type-variable"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>30mm x 30mm x 3mm Mild Steel Box Section Square Steel Tube - Speciality Metals<\/title>\n<meta name=\"description\" content=\"Top quality UK made hollow square steel tube mild steel box section. Ideal for many engineering &amp; DIY jobs. Best prices &amp; rapid dispatch\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.smetals.co.uk\/product\/30mm-x-30mm-x-3mm-mild-steel-box-section-square-steel-tube\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"30mm x 30mm x 3mm Mild Steel Box Section Square Steel Tube - Speciality Metals\" \/>\n<meta property=\"og:description\" content=\"Top quality UK made hollow square steel tube mild steel box section. Ideal for many engineering &amp; DIY jobs. 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