The gauge number 18 holds no relevance to the actual measurements.
Common stainless steel sheet thickness.
A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.
Thickness is measured along the longitudinal edges of the plate at least 3 8inches but not more than 3 inches from the edge.
0 0187 0 452 0 0217 0 55 0 0179 0 45 0 0159 40 25.
Sheet metal is one of the shapes and forms metal can be bought in.
For plates up to 10 inches excl in thickness the tolerance under the specified thickness is 0 010.
Sheet metal is any metal that has a thickness in between 0 5 6 millimetres.
1000 thru 1300.
There are other measurement units used to categorise metals by thickness though.
1300 thru 2100.
0 025 0 64 mm.
For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter.
Foils sheets and plates are pretty much the same with the only difference being in thickness.