Q&A for How to Cut Steel

A saw can be used to cut through steel slate, which is what Trump was promoting for the new wall.

Yes, it can be done. Steel legs on a shelving unit will require the use of some kind of saw or torch to cut through the thickness.

You could, but if it's hardened steel, it would take a long time. You'd be better using a wheel grinder.

An angle grinder is useful, as it is small and handy. You just need to find the right disc on to cut the cage.

Use the file, magnet and spark tests to determine type and carbon content of steel. Magnet test will determine whether it's stainless steel, since stainless will not be magnetic (or very weak). The file test can be use to determine hardness, which will identify whether the material is tool steel or mild steel.

You could try to drill the lock plug with a carbide or diamond drill bit, or you could try using an acetylene torch.

It can be cut with a oxygen acetylene torch or plasma torch. A high-quality saw could do it, but you'd need to exercise extreme caution.