What is the best way to cut an semi circle at the end of a flat piece of steel?

I have a a 100mm wide piece of flat steel and i want to cut a perfect semi circle at the end of the steel to make it look nice. I dont have a plasma cutter and im wondering how to get the perfect semi circle shape.

Just measure 50mm in from the end and sides, and plat a circle at that point. You can then roughly cut around it with whatever you have around, then finish by hand with a suitably large file.
legend4930 (author)  The Skinnerz4 years ago
Yeah I was thinking of marking the center like you said and then use a compass scribe and mark a semi circle and then use the angle grinder to cut close to the line leaving a 1mm and then finish of with a file.
+1. We sometimes forget the old methods....