Galvanized steel is made by dipping steel into molten zinc.
Do magnets stick to sheet metal.
The sheet can be smaller than the frame.
Wood and metal frames are not necessary.
The academic term for materials that do not attract magnets is diamagnetic.
Magnets will not stick to aluminum copper brass etc.
Even though the galvanization process involves coating the steel with zinc a nonmagnetic metal the magnetic properties of the steel are not hindered by the zinc coating.
That is why you won t see a magnetic business card sticking to a wooden desk for example.
Steel is an alloy of iron and carbon which makes it ferromagnetic due to its high iron content.
Magnets stick to any metal that contains iron cobalt or nickel.
Stainless steel however does not attract a magnet.
Iron or steel are often added to other metals to make them stronger.
Most people know from experience that magnets do not stick to non metal materials such as wood plastic fiberglass and textile.
30 gauge sheet can usually be found at building supply stores in sections that carry heat ventilation and air conditioning ducting.
The weaker metal will not attract the magnet but the addition will.
Magnets do not stick to non metal materials.
We use inexpensive plastic frames.
Finally make sure that when you order your item you tell the provider you are making a magnetic board and that you require the material to be flat and free of any surface imperfections or dents.
About the tin sheet.