where would i find the tollerance of materials eg metals, ceramics etc?

Answer 1

This is refered to as the Manufacturing tolerances. The deviation from the Nominal is the tolerance.

Manufacturing or industrial standards dictate the tolerance of the given process. see the link for Sheet metal Tolerances.

http://sheet-metal-fabrication.globalspec.com/Industrial-Directory/sheet_metal_tolerance

Each material and manufacturing process has a published tolerance.

Sandy

Answer 2

Many countries have a national standards agency - British Standards, American Society of Mechanical Engineers, DIN (Germany), EuroNorm etc. They publish details of a wide range of materials including metals, rubbers and plastics. Main city libraries usually have copies because they can be expensive to buy

Answer 3

Material properties can be found in a textbook or a table somewhere online.

For tolerances, it depends on the application. I might need a high tolerance for one product, whereas for another product the tolerance might not matter as much.

Answer 4

internet somewhere