What are the different grades of stainless steel mesh?

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A building worker is spraying shotcrete on welded wire mesh

Welded wire mesh, or welded wire fabric, or "weldmesh" is an electric fusion welded prefabricated joined grid consisting of a series of parallel longitudinal wires with accurate spacing welded to cross wires at the required spacing.

Machines are used to produce the mesh with precise dimensional control. The product can result in considerable savings in time, labour and money.

Uses of welded wire mesh

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The welded wire mesh is a metal wire screen that is made up of low carbon steel wire or stainless steel wire. It is available in various sizes and shapes. It is widely used in agricultural, industrial, transportation, horticultural and food procuring sectors. It is also used in mines, gardening, machine protection and other decorations.

Weld mesh is the term given to the kind of barrier fencing that is manufactured in square, rectangular or rhombus mesh from steel wire, welded at each intersection.

Welded wire fabric (WWF) is also sometimes used in reinforced concrete, notably for slabs.

Types of welded wire mesh

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There are several types of welded wire mesh which can be categorized according to their structure, use, and characteristics.

Welded wire fabric (WWF) for concrete slab reinforcement

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This type of mesh is a square grid of uniformly placed wires, welded at all intersections, and meeting the requirements of ASTM A185 and A497 or other standards.[1] The sizes are specified by combining the spacing, in inches or mm, and the wire cross section area in hundredths of square inches or mm2. The common sizes are in the following table:

Imperial Size Metric Equivalent Weight Imperial Weight Metric 6x6 W1.4/W1.4 152x152 MW9.1/MW9.1 20 lb/100 sf 0.98 kg/m2 6x6 W2.1/W2.1 152x152 MW13.1/MW13.1 30 lb/100 sf 1.47 kg/m2 6x6 W2.9/W2.9 152x152 MW18.7/MW18.7 41 lb/100 sf 1.99 kg/m2 6x6 W4.0/W4.0 152x152 MW25.8/MW25.8 56 lb/100 sf 2.73 kg/m2 6x6 W5.4/W5.4 152x152 MW34.9/MW34.9 76 lb/100 sf 3.72 kg/m2 4x4 W1.4/W1.4 102x102 MW9.1/MW9.1 30 lb/100 sf 1.46 kg/m2 4x4 W2.1/W2.1 102x102 MW13.3/MW13.3 43 lb/100 sf 2.40 kg/m2 4x4 W2.9/W2.9 102x102 MW18.7/MW18.7 61 lb/100 sf 2.96 kg/m2 4x4 W4.0/W4.0 102x102 MW25.8/MW25.8 83 lb/100 sf 4.06 kg/m2 4x4 W5.4/W5.4 102x102 MW34.9/MW34.9 119 lb/100 sf 5.82 kg/m2

Electro galvanized welded wire mesh with square opening

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This type of welded wire mesh is designed for building fencing and in other infrastructural purposes. It is a corrosion resistant wire mesh that is largely used in structural building. It is also available in different forms like rolls and panels for industrial uses.

Hot dipped galvanized welded mesh

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This type of mesh wire is generally made up of plain steel wire. At the time of processing it goes through a hot zinc covering process. This type of welded mesh ware with square opening is ideal for animal cage structuring, fabricating the wire boxes, grilling, partition making, grating purposes and machine protection fencing.

PVC coated welded mesh

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PVC coated welded mesh with plastic covering is constructed with galvanized iron wire of high quality. It has PVC powder covering that is processed by an automatic machine. The smooth plastic coating on this corrosion protective wire is attached with a strong adhesive which make increases durability of the wire. It is used in fencing residential and official properties like gardens, parks, building etc. The PVC coated welded mesh which is available as both rolls and panels, is also available in different colors like white, black, green etc.

Welded stainless steel mesh

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This kind of welded mesh wire is basically used in industrial fencing purposes. It is made up of stainless steel that has high strength and integrity. This corrosion resistance meshed wire is long lasting and is widely used in transportation, agricultural, mining, horticulture, entertainment and other service sectors.

Welded wire fencing

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This is a type of meshed wire that is available in rolls or panel for used for fencing. Also referred to as "weldmesh", it is available with or without galvanization. The non-galvanized version comes for a lower cost.

Welded steel bar gratings

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This type of welded mesh wire provides advantages like high strength, easy installation and feasible cost. It is mostly used for grating roads, making drainage coverings and building safety walls. It also has uses in chemical plantation, platform grating, metallurgy etc.

References

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   Frederic S. Merritt, M. Kent Loftin, Jonathan T. Ricketts, Standard Handbook for Civil Engineers, Fourth Edition, McGraw-Hill Book Company, 1995, Page 8.17

Having over 20 years of experience in the woven wire mesh industry, Haver Standard has brilliant knowledge about the different wire specifications and the right kind of alloy required as per your need.

In this article, we will shed some light on what a stainless steel mesh is and how to choose the right kind of alloy for your mesh.

Stainless-Steel Mesh

A stainless-steel mesh is essentially a series of interconnected lengths of alloyed steel that is welded in the form of a net or barrier. This type of mesh is known for its high resistance towards corrosion and is therefore used in various industries.

Steel in itself does not have the strongest properties, it is the addition of another element or metal that promises its strength and durability. There are innumerable types of stainless steel in the market, the differentiating factor among all of them is the quality of the alloy and the extent of carbon it contains.

When is steel classified as Stainless?

For steel to be considered stainless, it should have a range of about 0.03% to greater than 1.00% carbon and a minimum concentration of approximately 11% chromium – it is the mixture of chromium that prevents the iron from corrosion. The layer of chromium not only helps increase resistance against rust, but it also helps the metal self-heal in the presence of oxygen.

How is a stainless steel mesh made?

A stainless steel mesh may either be welded or woven.

The welding method: In this method the mesh is welded together at every intersection by placing it in a welding machine. It can also be done by hand, but this would take enormous effort and time.

The weaving method: In this method the threads of stainless steel are woven together at every intersection on a machine.

The main takeaway here is that, while the welding method gives out a permanent connection between the metal threads, the weaving method does not permanently link the threads making it more flexible and pliable to work with.

The 300 series Stainless Steel Mesh

Evidently, the multitude use of stainless steel derives from its altered compositions with other metals. The two main types of stainless steel wire mesh are the 316 stainless steel and 304 stainless steel.

Both these grades can be classified under austenitic stainless steels, they have a considerably higher amount of chromium compared to other types of stainless steels, thus, making them highly resistant to corrosion. This type of stainless steel (mainly grade 304) is used extensively in kitchen equipment like cookware and cutlery.

316 stainless steel mesh vs 304 stainless steel mesh

The simple difference between the two is its composition with other metals.

The 316 stainless steel mesh contains 16% chromium, 2% molybdenum and 10% nickel and the 304 stainless steel mesh contains 18% chromium and 8% nickel.

The addition of molybdenum in the 316 grade makes it corrosive resistant to chlorides like seawater.

What type of stainless steel to use?

With numerous alloys available in the market it gets hard to choose the right one. The starting point, however, does not change. Begin by pointing out how and where you are going to be using it, that itself solves half the problem.

Once you have that figured out, you can list out what kind of material you will be needing – something that is highly resistant to corrosion or a material that has a magnetic property and so on. If you are still not able to figure this out, then it is highly recommended that you choose an expert in the field, because the material that you select is going to make all the difference.

The right selection

Choosing the right material with the right strength and properties will help your engineers and technicians to get the best results. Every alloy has its own advantages and disadvantages and it is always beneficial to weight the both out when deciding what you want to go with.

Haver Standard is a pioneer in the wire mesh industry with over 20 years of experience, they have suitable specifications for every need. Their expertise in the field strongly points out as to why you should choose them.

Contact us to discuss your requirements of stainless steel pre-crimp mesh. Our experienced sales team can help you identify the options that best suit your needs.