Expanded metal mesh is also called pulled plate wire mesh. A rigid piece of metal that has been slit and drawn into an open mesh pattern in a single operation. It is stronger, lighter in weight and more rigid than the original base metal.

Expanded metal are produced from solid sheets or plates of carbon, galvanized and stainless steel, as well as aluminum and a variety of alloys of copper, nickel, silver, titanium, and other metals. Conventional mesh is formed in a diamond pattern. It has other pattern of square, round, triangle, scale-like opening.

Expanded metal mesh has a wide range of uses, graceful shapes , strong processing capability. A major advantage of expanded is that the mesh is formed from a single piece of material  and  the process is not  wasteful and therefore cost effective. 

Material:

stainless steel, carbon steel, brass , aluminum , titanium , nickel , Al-Mg alloy 

Specification:
Strand and Bond:Expanded metal is composed of strands and bonds. Strands form the sides of the expanded metal openings. Bonds are where the strands intersect. In other words, the bond is where each diamond shaped opening is connected with the next opening. 
SWD: SWD (Short Way of the Diamond) is the distance from the middle of the bond on one side to the middle of the bond on the opposite side.
LWD: LWD (Long Way of the Diamond) is the distance across the largest dimension of the diamond measured halfway between the diamonds. 
SWO: SWO (Short Way of the Opening) is the width of the opening of the shortest side of the diamond. SWO does not include the strand width, where SWD (Short Way of the Diamond) does. 
LWO: LWO (Long Way of the Opening) is the length of the opening of the longest side of the diamond. LWO does not include the strand width, where LWD (Long Way of the Diamond) does. 
Open Area: Expanded metal contains open spaces (the diamond-shaped openings) and material. Open area is the total area of the diamond openings divided by the total area of the sheet or roll of expanded metal and is expressed as a percent. In other words, open area describes how much of the expanded metal is open space. If expanded metal has a 60 percent open area, then 60 percent of the expanded metal is open space and 40 percent is material. 
Gauge or Thickness: Thickness is the measurement from the top surface to bottom surface of the expanded metal piece. Gauge is the most common measurement, but thickness can also be measured in fractional inches or millimeters. 
Width and Length: Length is the measure of the longest side of the expanded metal sheet or cut-to-size piece. Width is the measure of the shortest side of the sheet or cut-to-size piece. 
Note: Special designs or sizes is also available at customers request.