Expanded Metal Technology

The Expanded Metal is formed from a single piece of metal sheet without wastage.

Industry Solutions

Nine things you should know about these building components

Even though perforated and expanded metals have been used in construction for over 100 years, architects, designers and builders continue to find new applications for them and their usage is growing. Here are nine things you should know about these two building components.


Recently, there has been increased demand in both architectural and security applications for expanded metal. “The advantage of expanded metal for security applications is increased strength and difficulty breaching compared to chain link. It also works well behind drywall to prevent business-to-business building breaches.”

Expanded metal has new applications in and is quite functional for absorbing specific sound frequencies, EMI/RFI and microwave containment, control of design, control of lighting, control of ventilation, control of sound and the fabricating/structural considerations of open area. “Other unique applications for expanded metal are in foils with lightning strike protection, fuel cells, filtration and medical,” he adds.

From a design perspective, perforated metals are becoming more popular in parking garage applications, for sun shading elements and accents with backlighting. In some cases, corporate images with custom designed perforations are also requested.


Some believe expanded metal is the greenest type of open area metal on the market today. While it looks like expanded metal is punched, it is actually slit and stretched in one motion and there is no scrap generated in the process. A typical expanded product expands the raw material more than 300 percent; however, depending on the product, this can vary.  When perforating a 4-foot by 8-foot sheet, you get a 4-foot by 8-foot sheet of perforated along with all of the punched scrap. Both expanded metal and perforated metal are cold processes utilizing mechanical energy and dies and require no welding. Yet another type of open area metal would be metal bar grating, which, like expanded metal, doesn’t create scrap in its process. However, metal bar grating does use a significant amount of energy since it is a welded product. The lower environmental impact also generally translates into a lower overall cost.

Production processes for expanded metal create zero waste. It actually conserves (stretches) raw material input by up to five times, resulting in less material consumption and a reduced carbon impact. Use of expanded metal as a sunshade or a building envelope can greatly reduce interior cooling cost, while maintaining beneficial solar gain for heating cost reduction. Expanded metals enhance interior building environment quality and strengthen the relationship between indoor and outdoor spaces. Expanded metal mesh provides a medium through the introduction of filtered day and night views, along with control of heating, cooling and lighting. All of this while maintaining visual transparency in a desired direction.

Using expanded and perforated metals helps attain recycled materials credits. Material and Resource (MR) credits are available for construction waste management, recycled content and use of regional materials. Energy and Atmosphere (EA) credits using architectural meshes for shading on interior sections and exterior facades of building design can help to reduce solar effect and energy required to run HVAC systems.


Many different metals can be perforated. Aluminium is the desired material due to its inherent corrosion-resistant properties. This is especially true with exposed cut edges at the holes or penetration locations. Aluminium is popular because it doesn’t rust and doesn’t require paint.

Expanded mesh is available in most any ductile metal, alloy, plastic and polymer. Common materials expanded are aluminium, brass, bronze, copper, carbon steel, nickel alloys, platinum, silver, stainless steel and titanium.


Designers are further stretching the boundaries of aluminium by adding colours with an anodizing coating. Expanded metal is also available in original mill finish, powder coating and polyvinylidene fluoride (PVDF) finishes. Coatings are available in secondary treatments completed after the expansion process include Corten, hot-dip galvanizing, and painting and plastic coatings. Materials other than corrosion-resistant materials such as metallic-coated steels, it may be desirable to post paint the material after perforating because the primer and paint coating can provide some element of corrosion protection at the cut edges of the perforations.


Limitless pattern choices with expanded metals are providing a wider range of open-area options and opening apertures. Also, expanded metal is more than just a 2-D product, it is also 3-D. In its 3-D (raised) form, the sheet offers four views depending on how you view it. These 3-D patterns provide a unique and creative means of filtering light, while providing a striking visual appearance.

Other features available are solid and ribbon sections in the finished sheet parallel to the expand direction. In addition to perforated metal round holes, there are also slots, ovals, rectangular and square perforations are also coming into the marketplace.


Designers must be aware of and consider the structural characteristics of the formed panel or sheet/ plate. As metal is removed during the perforation process, you will lose structural performance of the materials as compared to a solid sheet. This may be partially offset by a reduction in wind loads on the cladding component (perforated panel) due to the perforations. An engineer should be consulted in the attachment methods of the cladding for code compliance.


One outstanding example of Morin’s customization is its custom message hole patterns.

Many types of graphics can be incorporated onto metal surfaces either as custom perforation patterns or applied graphics. Perforation itself has moved over the past decade from something utterly industrial to a means of providing a semiotic understanding of the site and the façade. Today, there are many perforation methods, from programmed CNC to fiber laser, rotary pinned, water jet cut or complex algorithms, that designers can select any level of customization at different price points.


Expanded and perforated metals are generally created on similar equipment. Both share the same equipment manufacturers, although some expanded metal mesh manufacturers make their own equipment. The differences are perforated starts and finishes from the same size sheet and expanded can produce up to five times more mesh from the same size sheet.

Expanded metal is slit and stretched in a mechanical press. One strand width is fed through the machine per cut. The dies then slit and stretch one strand. It takes two strokes of the machine to complete one design which is most commonly diamond in shape. Expanded metal sheets can be custom cut using traditional shears, laser, plasma, or waterjet methods. This allows for custom geometry as well as traditional panel sizes.


Once installed, when do perforated and expanded metal look or become outdated? Never. Perforated and expanded patterns aren’t necessarily ever dated. These patterned materials in a variety of alloys can be powder coated, polished or anodized—just a couple of finishing examples—to give a lasting impression.


Our Brochure explains all the product range and their technical attributes in detail for your ready references, offline.


35-36, Industrial Estate, Uppalwadi, Kamptee Road, Nagpur 440026 INDIA

E-mail: info@sarafbros.com sarafsidharth@gmail.com info@expandedmesh.in

Phones: Works: +91-712-2640542 | Office: +91-712-2644900 | Cell: +9198226 95359

What We Actually Do

When it comes to expanded metal products, the only limit to their applications lies within the human imagination.

As a manufacturer with some 60 years of experience in the production of expanded metal products, safety & hand rails, floor gratings and stair treads, Asian Streck Metals is yet to encounter a limit to the fields of application for their products.

Expanded metal products and their related applications can vary from our very popular base industrial range of meshes – typically used as walkways, screenings, to small aperture meshes which are used as covers, in phone towers, or to protect solar geysers from hail – and everything in between.

Expanded metal is also increasing in popularity in architectural applications, where functionality like noise and light deflection is combined with interesting aesthetic effects.

There is good reason for the popularity of this range.

Expanded metal possesses some very attractive inherent qualities. It has an excellent weight-to-strength ratio, and has an advantage over welded products, the material does not have localised weak points because it is made from a single sheet of  metal. It is furthermore cost-effective and the material, structural  design, and material-to-air ratio can be tailor-made to the customer’s requirements.

We pride ourselves in producing world-class quality-products and in going the extra mile to help our clients find the perfect combination of material and design for their specific needs… whether it be mild-steel, copper, or stainless steel, varying patterns, large or small aperture.

Our decades of experience – coupled with a spirit of innovation has led to the development of various distinctive products. As an example, we are Central India’s leading producers of non-slip serrated walkway mesh.

However, customers should be discerning when choosing expanded metal products, as there are certain visually subtle defects such as sharp edges or small tears in the joints that could be indicators of compromised structural integrity.

On the other hand, there could be variations in product-industry-term, product thickness which might appear as material flaws when, in fact, it is inherent to the manufacturing process. When these variations fall within the specified product tolerances, it is perfectly normal. Customers should always choose products that adhere to ISO standards, and which are manufactured by a trusted supplier with an excellent industry track record.

Asian Streck Metals has been privileged to supply their products for various new and exciting projects recently. This includes some of the newly built factories where expanded metal range has been used for machinery safety guards and in the manufacture of industrial walkways; as well as for certain security applications.

Other applications

With almost 60 years of experience in the manufacture of expanded metal products, Asian Streck Metals has been supplying a growing range of applications using this high quality and versatile material.

From screens, grates, scaffolding and truck bodies to walkways, tunnel linings and garden furniture, the uses are many and varied. Much of the attraction lies in the inherent structural integrity of expanded metal, as the strength is not compromised during the manufacturing process. Another great advantage is that light and air can easily pass through, creating opportunities for various innovative applications.

While the mesh is considerably lighter than the equivalent area of steel plate – as the original sheet can be expanded up to ten times – the network of rigid strands adds strength. It is either produced as raised mesh, or as a flattened mesh. Normally, manufactured from high quality local mild steel, both the mesh types can also be manufactured from any other ductile metal.

These are available in a range of thicknesses and mesh sizes. ‘Mini meshes’ have openings as small as 1.4 mm by 2 mm and a thickness of 0.4 mm, while larger meshes have openings up to 115 mm by 300 mm openings and a thickness of 6 mm. While expanded metal< is normally supplied unpainted, it can be finished with painting, stove enamelling, plating or galvanising.

The application of expanded metal is really limited only by the imagination of the designer or engineer, and the material is widely used in sectors as diverse as mining, construction and food. Expanded metal has even been used in the building of grain silos, and for decorative purposes. Among the range of building products and architectural expanded metal products already widely used in the marketplace.

This product provides a true straight-edge for forming an arris – or sharp edge – in plaster-work, which resists chipping or cracking. The ASM Expanded Mesh is an effective plaster base for walls and ceilings and permanent shuttering for concrete, while the it delivers a straight-edge and finish for plaster at all openings and abutments.

Also in the range is ASM Plaster Mesh, used to provide a key for plaster and as a reinforcement to minimise cracking, as well as ASM Strip Mesh, for plaster reinforcing along lines of potential weakness – such as at the corners of doors and window frames. ASM Brickforce Mesh is for reinforcing in brickwork to strengthen walls, and ASM Hail Guard Mesh prevent gutters from filling up with hail, dirt and leaves.

Features and Benefits

The Expanded Metal is formed from a single piece of metal sheet without wastage.

Expanded Metal products are produced from solid sheets of Aluminium, MS, SS, Copper, Brass, Titanium & Polycarbonate. In this process the sheet is simultaneously slit and stretched, expanding the slits into diamond & other shaped holes of uniform size, shape, regularity & giving perfect geometrical shape. No Wastage is produced in this process. This provides cost savings, especially compared to other metal processing methods. There is nothing to work loose, no fretting strands or strained joins or welds which makes expanded metals ideal for forming and beneficial to further processing such as pressing and shearing. The strength of mesh makes it valuable for use in multiple components.

Higher strength-to-weight ratio than sheet metal

Higher strength-to-weight ratio is the major advantage of the expanded metals providing stronger per kilogram and lighter per metre than the original sheet.

Practical and effective Screening

Taking a sample of mesh and looking through at various angles best illustrates the visual properties of expanded metal meshes. Wide strand meshes are used in architectural solar screens on the exterior of buildings and throughout interiors for decorative grilles.

Anti-Slip Surface

The uncut knuckles of the expanded mesh withstand stress better than welds or joints and also give sound grip underfoot, particularly when used in staircase, ramps and walkways. Some patterns have a type of mesh with special qualities that not only make the surface non-skid, but also give the expanded metal water and wind repellent qualities.

Can be Deep Drawn

Expanded Metals can easily be bent, cut, folded, rolled & deep drawn as per the required works as shown in the pictures below. They allow more air through them unlike metals sheets. With varieties of expanding metals, they look more attractive.


Expanded metal can be weldable using MIG, ARC, GAS etc.


Expanded metals can be cut in either in shearing or plasma cutting for various shapes and sizes for different applications.


Expanded metals also had unique feature is that rollable for easy to transport and also use in the roll form for some architectural design applications.


Expanded metals can fold in any form, any size, for various applications in architectural designs.

Environmentally sustainable against high wind speed

These are cost effective, Environmentally sustainable with a high wind load capacity.

How We Solve Problem

Green Environment

Road Barriers, Flame Arrestors, Secure Rooms, Door & Window Guards, Lockers, Machine/Equipment Guards, Hail Guards, Air Bags, HEPA Filters, Structural Reinforcement, Sound Barrier Walls.

Oil & Lubricants

Oils and Lubricants

Turbine Filters, Power Generators, Gauge/Sight Glass Shields, Lightning Strike Guard, Crumple Zones, Fuel Cell Filters, Anti-Slosh Mesh (Fuel Tanks).

Power Systems

Metal Lath Replacement, Tool Room Enclosures, Grounding Mesh, Architectural Mesh/Façade, Dry Wall Patch.


Garden Enclosures, Trailers, Tractor & ATV Grilles, Fencing, Gates, Animal Fitting & Milking Stands, Greenhouses, Nursery Tables, Outdoor Benches & Seating, Plant Trellises & Living Walls, Animal Enclosures, Garden Carts, Mining & Soil Sifting Equipment.

Safety & Environmental

safety guard

Road Barriers, Flame Arrestors, Secure Rooms, Door & Window Guards, Lockers, Machine/Equipment Guards, Hail Guards, Air Bags, HEPA Filters, Structural Reinforcement, Sound Barrier Walls


Fall Protection, Hail Screen, Rooftop Security, Shading,
Impact Protection, Flat Roof Guard, Gutter Guards, Chimney Caps, Fire Screens, Patio Furniture, Window Guards, Skylights.

Industry Benefits

Expanded metal mesh has the reputation for being versatile, economical and incredibly durable, which is why more and more industries are recognising its value for a multitude of applications.

The environmental benefits of perforated metal are making it an increasingly appealing green solution.

As more developers strive for sustainability and buildings reach even higher levels of environmental performance, perforated metal offers substantial environmental and aesthetic advantages.

A perforated metal architectural façade doesn’t just look good. It helps to keep a building cool and its occupants comfortable.

It helps to control:

  • Light filtration
  • Sound
  • Ventilation
  • Visual outlook
  • Privacy
  • Shading
  • Solar heat and glare

Safety is one of the highest priorities at Asian Streck Metals. It is imperative that everyone follows the policies and guidelines to ensure their own safety and the safety of others around them are followed stringently.

There are numerous benefits to using expanded metal mesh for a custom basket design, such as it:

  1. Having better air flow than perforated sheet metal;
  2. Being less costly than sheet metal;
  3. Wasting less material than perforated sheet metal;
  4. Being stronger than wire mesh;
  5. Weighing less than traditional sheet metal; and
  6. Being easier to weld than wire mesh.

Expanded metal mesh is ideal for heavy-duty parts washing applications where sheet metal would prohibit air or fluids from flowing, but thin steel wires would not be strong enough to safely hold the parts.

Additionally, because expanded metal mesh is one solid piece of material, there’s no need to weld the individual strands together—which saves time and money on the manufacturing process while ensuring higher structural integrity.

Asian Streck Metals was founded with highly knowledgeable, responsible & dedicated team. From the very beginning, we focused on the dynamic development. The goal still remains. We are the company chasing new challenges. Constantly are looking for the best solutions and new technologies helpful in creating new designing for exterior and interior products (Expanded metal mesh) for Residential, Commercial & Industrial buildings.


India [Offshore]



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