Most strong and thick sheet metals will require power tools for cutting, such as an angle grinder, band saw, rotary tool, ...

This quick and dirty angle grinder circle cutter certainly fills the bill, and makes decent cuts in sheet metal to boot ... and makes a surprisingly clean cut. Check out the build and the tool ...

The grid is spot-welded into a steel box and then put into ... it a cellular structure. Effects of cutting into a cylinder of Proteus with an angle grinder. According to their paper, the ...