Thread: Crucible steel file

I've decided to try my hand at making a razor and before I start shelling out for steel bar I wanted to experiment with making one out if a file as I've seen on the forum is often done. I've started work on an old Sheffield file that is stamped 'crucible steel' and have got the rough shape down. I'm after a near wedge and have left the edge around 1.5mm thick.
I've done all the work so far with my angle grinder and bench grinder. I gave it a little polish too so I could see how the blade faces were looking in terms of flatness. I have read the posts regarding heat treating and am wondering what would be best for crucible steel regarding temps and times. Or more to the point if crucible steel is ok to heat treat. I know many old blades where made of crucible steel but I'm not sure on the ht process. Any help would be appreciated. Oh, and I'm going to drill the pivot hole in the morning. I'm currently looking to purchase a small knife forge to do the ht. not quite sure what's going to be best for quenching, canola oil isn't widely available here in the uk. Many thanks, Rob.