Expanded metal
About Expanded metal
Name of each portion
| Symbol | description |
|---|---|
| SW | Center-to-center distance shorter direction in mesh |
| LW | Center-to-center distance longer direction in mesh |
| T | Plate thickness |
| W | Feed width |
| B | Length of bond |
| D | Thickness of expanded metal |
| SWO | Shorter length of hole |
| LWO | Longer length of hole |
| Strands | Thin portions in mesh |
| Bonds | Thick portions (intersections) in mesh |
| L | Width of product (hole length direction) |
| S | Length of product (hole width direction) |
Types
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Bond cutting (mechanical cutting)
L-size cutting at bond portions in alignment with holes
Full mesh
S-size cutting at bond portions in alignment with holes
-
Shearing
Without regard to the completeness of edge holes
Cutting at strands
(particularly occurring at the time of re-cutting)
-
Rhombus hole type
Mesh type of expanded metal, with short bonds
-
Hexagonal hole type
Mesh type of expanded metal, with long bonds
-
Abacus type
Product size L x S, in which L is larger than S (examples: 1829×914, 2438×1219, etc.)
-
Tatami-mat type
Product size L x S, in which L is smaller than S (examples: 914×1829, 1219×2438, etc.)
Standard products
Steel expanded metals are specified in "JIS G3351 (1987) expanded metal."
Types of JIS standard expanded metals
XG grating
XS standard
Expanded metal laths
Expanded metal laths are metal plates made of aluminum, stainless steel, brass, titan, nickel, etc. having relatively small holes (cut and expanded holes) and are excellent in decoration and functions. Because of their three-dimensional structure, they irregularly reflect light and have beautiful appearance. Seeing through them is difficult, but because they have large ventilation area, they are used as the ventilators and grill ornaments of vehicles, ships and airplanes. They are widely used also in electric equipment, air-conditioning equipment and construction. Their applications are expanding in various fields.
XF flat type
Bumps on expanded metal surface are suitable to many applications, but depending on the application, they can become a demerit. For such an application, expanded metal is subject to skin pass rolling to obtain XF whose strands and bonds are level with the plane. However, forcibly flattening the bumps makes the expanded metal out of the JIS standard in terms of size. XF flat type is widely used, for example as partition between buildings, fence, window bar, vent, window screen, net rack, birdcage and flower stand. XF flat type is also used as an alternative to punched metal.
Strut grating
Strut grating is a slip-stopping steel scaffolding plate having sawtooth-like holes. The protruding sawtooth-like holes exert strong frictional forces in every direction, so they ensure high safety in field work.
