Stainless Steel Flat Bar: The Versatile Metal Strip You Need to Know

Stainless Steel 304 Grade Flat Bar 6mm Thick x 30mm Width

Stainless steel is an essential material that has, if anything, become even more popular over the last few decades.

We all know it for its unique properties, such as high resistance to corrosion and durability. Stainless steel flat bars are an essential product made from stainless steel that is used in various applications, from construction and architecture to automotive and aerospace industries.

In this blog, we’ll discuss the various applications of stainless steel flat bar, how it’s made, its properties, and why it’s an excellent choice of material. 

Let’s go….

What Is Stainless Steel Flat Bar?

Essentially, stainless steel flat bar is simply a long, narrow, flat metal strip that is made by rolling steel through a machine until it reaches the desired thickness.

The material is then cut into lengths, and the edges are smoothed to produce a perfectly flat surface.

Stainless steel flat bars are available in different sizes, shapes, and grades, depending on their intended use.

How Is It Produced?

304 stainless steel flat bar is produced through a process called hot rolling. Here are the general steps involved in the production of 304 stainless steel flat bar:

  1. Melting: The raw materials, including iron ore, chromium, nickel, and other alloying elements, are melted together in an electric arc furnace or other melting furnace. The melting process ensures the proper composition of the stainless steel.

  2. Casting: Once the molten stainless steel is ready, it is cast into large rectangular moulds to form semi-finished products called billets. These billets have a similar shape to the final flat bar but are larger in size. Billets are also a popular metalworking material in their own right. 

  3. Hot Rolling: The billets are reheated to high temperatures and then passed through a series of rolling mills. These rolling mills gradually reduce the thickness and width of the billets while elongating them to the desired length. The rolling process is performed at high temperatures to make the stainless steel more ductile and easier to shape. This is similar to how our wire products are drawn through a series of dies. 

  4. Annealing: After hot rolling, the stainless steel flat bar is annealed. Annealing involves heating the stainless steel to a specific temperature and holding it there for a certain time, followed by controlled cooling. This process helps to relieve internal stresses, improve the mechanical properties, and enhance the corrosion resistance of the stainless steel. This is why flat bar is made as flat bar, rather than simply being cut from sheet metal. When that is done the stresses from the cutting make the metal bend and bow. 

  5. Finishing: Once the stainless steel metal strip has been annealed, it undergoes various finishing processes. These processes include surface cleaning, straightening, cutting to length, and surface treatment such as polishing or grinding to achieve the desired surface finish.

  6. Quality Control: Throughout the production process, quality control measures are implemented to ensure that the stainless steel flat bar meets the required specifications and standards. This may involve testing the mechanical properties, dimensions, and surface quality of the flat bar.

Our flat bar is then ready to be stocked, ready for ordering. 


Our customers have used stainless strip in the construction and architecture industry for framing or structural support.

Architecturally, they’re used as the main support beams in tall buildings and the frames for large structures such as bridges. These are specialist and super strong materials however. The standard range that we offer are simply the most popular, they are not architectural options. 

Moreover, the automotive and aerospace industries use stainless steel flat bars for manufacturing various parts for vehicles, airplanes, and even spacecraft.


Stainless steel flat bars are made from a variety of alloys, with each one having different properties.

The most common grades of stainless steel used for flat bars are 304 and 316. We specialise in 304 grade strip. 

One of the major advantages of using stainless steel is its resistance to corrosion. This ability makes stainless steel ideal for use in harsh environments such as marine environments where the metal is exposed to saltwater.

Another property that makes stainless steel popular is its strength and durability. It is an incredibly tough material that can withstand high temperatures and heavy loads. Additionally, stainless steel is easy to clean, which makes it a popular choice for applications that require frequent sanitation.

Why Choose Stainless Steel Flat Bars?

The advantages of using stainless steel flat bars are endless. Here are some of the main reasons why you should consider using stainless steel:

  • Corrosion-resistance: This is the most important factor behind choosing SS304 metal. Stainless steel is highly resistant to corrosion, rust, and stain. This gives stainless the advantage over mild steel and aluminium in terms of corrosion resistance. 
  • Strength and durability: Stainless steel is known for its strength and durability, which means it can withstand high loads, shock, and vibration.
  • Easy maintenance: Stainless steel doesn’t require much maintenance and is easy to clean, which means it’s perfect for environments where cleanliness is important.

Can It Be Used For DIY Projects?

Yes. It is very popular for DIY projects.

Here are some common DIY tasks where stainless steel flat bar have been utilised by our customers:

  1. Furniture Making: Stainless steel flat bar can be used to create sleek and modern furniture pieces, such as table legs, chair frames, or shelving supports. Its durability and corrosion resistance makes it ideal for myriad indoor and outdoor furniture projects.

  2. Home Décor and Accessories: Stainless steel flat bar can be incorporated into DIY home décor projects, such as wall-mounted shelves, mirror frames, or floating bookcases. It can also be used to create unique and contemporary accessories like towel bars, coat hooks, or curtain rods.

  3. Garden and Outdoor Projects: It is an excellent choice for various garden and outdoor projects. It can be used to build sturdy plant stands, trellises, or garden edging. Additionally, it is suitable for constructing pergola frames, outdoor seating, or decorative garden sculptures.

  4. Handrails and Balustrades: If you’re looking to update your staircase or balcony, stainless steel flat bar can be used to create stylish handrails and balustrades. 

  5. Custom Metalwork: Stainless steel flat bar allows for custom metalwork projects, such as DIY brackets, brackets for floating shelves, or custom brackets for mounting TVs or other electronic devices. Again,  its combination of strength and versatility make it ideal for creating tailored solutions for specific needs. 

What Options Are Available? 

We stock several standard options of 304 stainless steel strip. Here are a select few of the most popular:

Stainless Steel 304 Flat Bar 3mm Thick x 20mm Width
Stainless Steel 304 Grade Flat Bar 5mm Thick x 25mm Width
Stainless Steel 304 Grade Flat Bar 3mm Thick x 30mm Width
Stainless Steel 304 Grade Flat Bar 6mm Thick x 40mm Width strips of metal
Stainless Steel Flat Bar 6mm Thick x 50mm Width

In conclusion, stainless steel flat bars are an incredible product that offers multitudinous advantages when compared to other materials.

They are resistant to corrosion, tough, durable, and easy to clean and maintain.

When you need reliable and durable metal strips for your projects, consider using Speciality Metals’ stainless steel flat bars.

As always, thank you for checking out our blog. We hope that this helps you with your project. 

Please also check out the other articles in our helpful guide series. We have written about aluminium sheeting and checker plate recently to name but two of our articles.

We are also proud to sell this product on our highly popular eBay store, check us out there too.

If you have any further questions, feel free to contact us.



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