[TheForge] Steel substitution

[Andy Vida]

Adam Whiteson wrote:
> 
> I have used 5160 for small hot chisels.  Seems to work well if you keep
> cooling the edge after every few hammer blows.  I think A36 would make
> a  poor chisel hot or cold.

	I've made chisels of A36 and they have worked OK when super
	quenched.  Not a first choice by any means, but they were
	good enough to use as gravers on Pure Iron (I was cutting some
	fuller-like grooves in an iron bracelet).  Cutting edge was
	shot after about an hour of hacking and had to be dressed, but
	given that I had no gravers of that size and configuration,
	the SQ'd mild steel was just the ticket.