If you ve hit it hard enough the chisel will cut the sheet metal if it s thin enough.
How to cut brass sheet metal.
Place the metal on a hard surface to score it and on long pieces do the bending with the score place along a sharp edge of a bench and if necessary clamp the fixed piece with a long piece of flat wood to prevent buckling the metal while bending it back and forth.
Using a chisel and hammer is the most basic form of cutting sheet metal.
If you need to cut fine details in thin material here s some recipes and tips to get you started.
There are three tools that kevin caron uses a lot to get a precise cut from a thin piece of metal.
2d contouring tips and tricks.
Cutting straight lines with an electric saw.
For cutting brass sheet up to 0 02 i use an old tailors scissors and over 0 02 i use a good old hand jig saw with a metal sawblade in that case i position the brass sheet constantly only a few mm over the edge of a supporting wooden plate underneath nils.
Another tool is a plate shear for cutting slightly.
Choose a saw with a tooth number of at least 24tip teeth per inch to ensure even cuts in the metal.
Simply line up your chisel along the line you are going to cut and strike the back of it with a hammer.