Vendigroth writes -

Following the puzzlement on how I made the loop on my throwing knife instructable, I thought i’d make one on the things that can be done with hot steel. I’ve missed a few out because i think the basics are covered here. If you want to make a bar thinner, for example, you only need to use a slight variant on Drawing out the bar. If you try this a bit, you’ll get the hang of it.
The only thing you have to know is that you’re changing the profile of the bar, but leaving the volume the same. You can beat it out into foil, or forge it into a sphere, but it’ll still be the same volume.

instructables: 5 Things to do with hot steel and ideas for more – Link.