Folded Sheet Metal Box Supplier
Folded Sheet Metal Box Manufacturer
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Custom Folded Sheet Metal Box - KDM

Folded sheet metal boxes are high-strength enclosures. It is formed by sheet metal folding – a stage in the metal fabrication process. As your professional manufacturer, KDM fabricates metal boxes ranging from small, and large to complex designs. We use high-tech equipment and manufacturing processes that allow us to work with 0.4mm up to 5.0mm gauge in a range of steel, up to 15mm aluminum, mild steel, stainless steel, etc.

Our range of folded sheet metal boxes features outstanding electrical conductivity, resistance against harsh industrial environments, corrosion-resistant and emission reductions. KDM guarantees excellent overall design success and a positive customer experience. Custom folded sheet metal box at KDM!


Aluminum 5052 Folded Box

Aluminum 5052 are highly malleable materials. It is easy to fold and bent as desired to produce a versatile box. The folded box features high strength and toughness.

304 Stainless Steel Folded Box

304 stainless steel has good malleability and higher tensile strength. It is ideal for sheet metal enclosure designs for high-impact purposes.

Annealed Steel Folded Box

Annealed steel folded box has great foldability. It is available in different grades such as 4140 steel which exhibits good weldability and machinability.

4003 Stainless Steel Folded Box

4003 Stainless Steel has high stiffness and excellent malleability features. It is great for making a four-sided box shape that ensures easy access for service.

Copper Metal Folded Box

Copper is great for making metal boxes. It is highly malleable and offers excellent thermal and electrical conductivity. This is easy to form and fold to various sizes and thicknesses.

Custom Folded Metal Box

KDM custom folded metal box according to your request. We can fold and bent sheet metal boxes into different sizes and shapes. KDM help design complex folded box.

Galvanneal Metal Folded Box

Galvanneal metal box is coated with zinc and annealed. Thus, you can ensure no flaking off during forming or bending. It is a perfect metal enclosure in wet conditions.

Mild Steel Folded Box

Mild steel folded box has good ductility and weldability, high tensile strength, and high impact strength. It has great malleability with cold-forming possibilities.

316 Stainless Steel Folded Box

316 stainless steel folded box contains chromium and nickel. Thus, it features increased corrosion resistance with longer life. You can request different enclosure designs at KDM.

Folded Sheet Metal Box Materials

KDM is a professional manufacturer that works with a variety of metal materials to meet your needs. These materials are flexible and thoroughly checked and inspected before processing. We use the right material suitable for sheet metal folding – a stage in the metal fabrication process that covers the folding, bending, and pressing of sheet metal into various stipulations. Below are some of the materials:

  • Stainless steel
    • 304 stainless steel
    • 4003 stainless steel
    • 316 stainless steel, etc.
  • Aluminum sheet
  • Copper sheet
  • Mild Steel
  • Galvanized Steel
  • Annealed Steel

If you have a specific material requirement, don’t hesitate to tell us.  We are a competent, efficient, and reliable company ready to serve you to boom your business.

Folded Sheet Metal Box Applications

With advanced bending equipment and high-tech metal folding techniques, KDM ensures high efficiency and high productivity in the manufacture of any type of folded metal box for different uses. This box varies in complexity. From small boxes with a single fold to large boxes with many bends.

A vast range of folded metal boxes is found in many industries including electrical and electronic boxes, vending, aerospace, kiosk, food and packaging, and more. Send your specific applications to us, KDM can design custom folded metal boxes compliant with various certifications.

Choose KDM to Custom Folded Sheet Metal Box

KDM is an ISO9001-certified company that provides a one-stop solution for sheet metal box fabrication. We produce high-precision and seamless appearance folded metal boxes suitable for various applications. Our team can fold metal in various box configurations to meet your projects and specifications.

Our advanced press brake machines help to achieve accurately designed folded sheet metal. These machines can fold boxes at desired angles to create a compact product. Skilled employees and staff with profound experience support us to create a wide array of different folded metal boxes.

From design, prototyping, cutting, and punching to metal folding, welding, and assembly, we got you covered. For your next folded sheet metal box project, KDM is your ultimate choice. We are eager to take your design and make it a reality.

Our customization expertise allows us to bring unique and versatile enclosures to the market. We have a customer service team available 24/7 to support your needs.

Message us now!

Folded Sheet Metal Box: The Ultimate Guide

Probably, you are looking for high quality folded sheet metal box.

A reason this guide explores everything you need to know about folded sheet metal box such as design, features, benefits and fabrication process, amongst others.

So, if you want to learn more, read this guide.

What Is Folded Sheet Metal Box?

Folded sheet metal box is a unique type of box whose primary material is sheet metal. There are different types of sheet metals that you can use in various applications.

Folded sheet metal box

Folded sheet metal box

Folded Sheet Metal Box Fabrication

The fabrication process of your folded sheet metal box fabrication involves the following steps:

Developing A Design

Before fabricating your folded sheet metal box, you need to have a design. The design includes all the details of the final product.

Such details include measurements, thickness, and bending angles. You have different software that you can use to develop these designs.

Selection Of The Sheet Metal And Cutting

There are different sheet metals that you can use to fabricate your sheet metal box. When choosing which one to use, you have to consider the quality and final appearance of your folded sheet metal box.

Once you have your sheet metal, you proceed to cut it. The cutting depends on the length and the folding angles of the different parts.

There are two main ways of cutting your sheet metal, using shear and without shear. Each of these methods is unique and appropriate to use depending on the part you cut.

Cutting using a shear involves shearing, blanking, and cutting. This method is helpful if you are fabricating non-industrial boxes.

Folded Sheet Metal Box Fabrication

Cutting using a shear offer a low precision cut on the edges. You also can use basic cutting techniques to cut your sheet metal.

Basic cutting leaves smooth edges on the surface of your sheet metal. The advantage of basic cutting is there is no limitation to the thickness of your sheet metal.

It is also cost-effective since you don’t have to preheat your sheet metal before cutting.

Cutting without a shear involves using several methods. These methods include laser, waterjet, beam, and machine cutting.

The advantage of cutting without a shear is that it offers precision cuts. This makes it the best option when fabricating aviation sheet metal boxes.

However, these methods are costly and not ideal for use on small-scale projects. The method also involves and requires qualified personnel to cut your sheet metals.

You can learn more about sheet metal laser cutting.

Cut sheet metal for making box

Cut sheet metal for making box

Forming Your Folded Sheet Metal Box

Forming involves assembling the different parts of your sheet metals. It also involves folding the various sections and joining the parts to form your box.

One of the vital machines you can use to fold the different parts is a brake machine. This machine can bend your sheet metals to different designs depending on the bending angle.

Before bending your sheet metal, you have to consider the measurements. This is to prevent having inaccurate sizes of your sheet metal box.

A stamping machine is another vital tool when forming your folded sheet metal box. Stamping helps create holes or form unique patterns on your sheet metal box.

You can also use stamping for embossing, drawing, flanging, hemming, and curling.

Using a spinning machine is also critical in spinning your sheet metal parts. It is vital in fabricating curves for your folded sheet metal box.

You can use a wheeling machine as an alternative to spinning.

Joining Sheet Metal Parts

Joining helps in creating an ideal folded sheet metal box. This is done by bonding the different parts to form a single unit.

The different methods of joining your folded sheet metal box are welding and the use of fasteners. Fasteners include screws, rivets,

Fasteners do not provide a strong bond when you join the parts of your box. You can use them in temporary joining or joining non-essential parts.

You have to factor in different factors when selecting a suitable fastener. For instance, the parts you are joining, the cost of the fastener, and the sheet metal you are using.

The advantage you have with fasteners is they are relatively cheaper and easy to install.

Welding is a suitable method of joining your sheet metal parts. This is because it offers a secure and durable joint.

Welding prevents the entry of elements that can affect the quality of your folded sheet metal box. For instance, water seeping through can encourage corrosion.

The different welding techniques available are electron beam, resistance, and arc welding.

Material You Can Use For Folded Sheet Metal Box

Sheet metal is the primary material that you use to fabricate your sheet metal box. However, there are different sheet metals for your selection depending on various factors.

These factors include:

Sheet Metal Cost

The different sheet metals have different prices due to their unique properties. Your budget and the type of product you manufacture determine the kind of sheet metal you will use.

However, it would help if you did not compromise on the quality of your product by selecting a sheet metal that does not fit the standards required.

Sheet Metal Thickness

Sheet Metal Thickness

Sheet metal thickness is critical during your folded sheet metal box machining process. A thin folded sheet metal box is more accessible to machines than a thick folded sheet metal in cost and machine.

Type Of Sheet Metal Box

The different sheet metal boxes available are used in different applications and hence have different properties. The selection of your sheet metal should consider the application you want to fabricate to enhance durability.

Sheet Metal Box

Certain sheet metals are suitable for the fabrication of outdoor sheet metal boxes. There are sheet metals compatible with specific finishes and not with others.

The main types of sheet metals for your selection are:


Aluminum is easy to fold and machine, making it ideal when fabricating your folded sheet metal box. You also have a wide range of surface finishing options available when using aluminum due to its compatibility.

The price of aluminum is also affordable than the other sheet metal. The advantage of aluminum is you have three grades, 3003,1100, and 6061, to select the best for your fabrication.

This depends on the different characteristics of these grades.


One of the unique characteristics of copper which you can include when fabricating your folded sheet metal box is its red color. The advantage of copper is its high thermal conductivity, which allows the fabrication of boxes for use in adverse conditions.

Copper is, however, a more costly sheet metal than the other types, which necessitates proper financial consideration before selecting it. You have the assurance of the quality and durability of your folded sheet metal box when you use copper.


Steel is available in two variants that are, galvanized and stainless steel. These variants have unique characteristics that you can use when fabricating your folded sheet metal box.

Such characteristics include resistance to corrosion, aesthetic appeal, and durability. Steel is ideal for fabricating folded sheet metal boxes for outdoor usage.

This is due to they can endure adverse conditions.

Surface Finishing For Folded Sheet Metal Box

Among the different surface finishes you can apply on your folded sheet metal box are:

Folded sheet metal box

Folded sheet metal box

Bead Blasting

This process involves shooting tiny glass or sand particles using a shooting machine. Shooting these particles results in a smooth surface of your folded sheet metal box.

This leaves your surface having a matte appearance. You can use this finishing method to enhance the appearance of your metal box.

It is the best method to use on aluminum sheet metals. Bead blasting offers a durable surface finishing option, and it is easy to apply to your folded sheet metal box.

Using this method for small-scale finishes is not economical due to the required resources. Protective gear is essential before applying the surface finish to minimize body harm.


You can use this method to fabricate using aluminum and titanium sheet metals. The process involves adding the thickness of the sheet metal through anodizing.

Anodizing involves removing ions from a sacrificial metal and adding them to your sheet metal. This is to enhance the individual properties of your sheet metal.

Such properties include making your sheet metal corrosion-resistant and enhancing its durability. Anodizing effect depends on the type of acid you use during this process.

Common acids you can use include chromic and Sulphur acids.

The advantage of this process is that it improves your sheet metal quality. It, however, increases the weight of your sheet metal.

This can limit the use of your sheet metal when you are fabricating folded sheet metal boxes of a certain weight. It is also not a suitable option for most sheet metals.

You can only use it on aluminum and titanium sheet metals. The strength of the acid weakens as you use the process. This reduces the uniformity of the process.

You may have to frequently replace the acid, which increases the overall cost of the process.

Powder Coating

Powder coating involves applying a powder layer on the surface of your sheet metal using a spraying machine. The spraying machine allows for a uniform layer of powder over the surface of your sheet metal box.

Baking is a critical part of the process after spraying your powder. This is to enhance your folded sheet metal box’s bonding effect and visual appearance.

Powder spraying makes your sheet metal box’s surface resistant to corrosion, wear, and tear. This increases the durability of your metal box.

Applying this method is cost and time effective. You also have a wide range of colors to select for this method.


The process of electroplating improves your sheet metal’s properties. This makes it corrosive and resistant and enhances durability.

It involves using an anode as your sacrificial metal and a cathode as the sheet metal. An electrolyte helps in bonding the metals through an electrical conduction process.

There are different sacrificial metals that you can use. However, the common ones are tin and nickel.

Electroplating improves the electrical conductivity aspect of your sheet metal. This increases areas of application of your sheet metal box.

Electroplating has the effect of increasing the weight of your sheet metal. This limits the resulting sheet metal use to applications where weight is an issue.

The following factors are crucial when choosing which surface finish to apply to your folded sheet metal box.

Cost Of Surface Finish


Cost involves the price of a surface finish and the price of applying it to your folded sheet metal box. The ideal cost should cover these factors without having to strain your finances.

Compatibility Of Surface Finish

The final appearance of your folded sheet metal box depends on the compatibility of your surface finish. The surface finish should match your metal box and offer a durability aspect.

Certain surface finishes are not ideal for certain sheet metals. For instance, electroplating is not suitable for aluminum sheet metal.

The Functionality Of Surface Finish

Different surface finishes offer different functionality to your folded sheet metal boxes. Blasting, for instance, is ideal for increasing the visual appearance of your folded sheet metal box.

Electroplating reduces the corrosion of your sheet metal by enhancing its properties. It is also possible to have different surface finishes on your folded sheet metal box.

For all your folded sheet metal boxes, contact us now.

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