How do you burn/destroy/melt a metal keyring?

I just want to make something unrecognisable. A single flame has not worked. It's not done anything at all to it.

Steel can be dissolved with a diluted solution of nitric acid and water. The chemical make up of nitric acid reacts to the iron in steel, producing iron nitrate and hydrogen gas. As this chemical reaction takes place, the steel begins to dissolve.

He might be trying to break the law. Should have asked why first

If you're allowed this in a science lab, then you're allowed it at home.

Yes but op is breaking the law from a set of keys he stole and that’s why he wants to make them unrecognisable

I mean but why? > I’ll tell you but I’m curious to ask why first.

I know multiple ways down from fire to household chemicals

Steel can be dissolved with a diluted solution of nitric acid and water. The chemical make up of nitric acid reacts to the iron in steel, producing iron nitrate and hydrogen gas. As this chemical reaction takes place, the steel begins to dissolve.

Do you know what metal it is?

Do you have access to any power tools?

He might be trying to break the law. Should have asked why first

I know how to do with with household chemicals or a house hold appliance that both of them everyone has and it’ll completely destroy any metal but I want to know why first like anon stated

Say that again in English.

Yes but op is breaking the law from a set of keys he stole and that’s why he wants to make them unrecognisable

Steel can be dissolved with a diluted solution of HNO₃ and H2O. The chemical make up of HNO₃ reacts to the Fe in steel, producing Fe(NO₃)₃ and hydrogen gas. As this chemical reaction takes place, the steel begins to dissolve.