This is a Bowie-ish...thingamabob knife that i started on the other day while taking a break waiting on the glue to dry between slabs on a commission i was working on.  Steel was some scrap i'd gotten in a bucket from a buddy of mine, i'd guess it was a piece of angle iron or i-beam, judging from the cut marks.  it started as a bar, 5"x 2"x 1/4", and hammered out to somwhere in the area of 8" of blade, and about 5" of handle.  Originally i was going to do a paracord wrapped handle, then changed my mind and drew the tang out so as to do an oak handle, with bolster.  I ground in a large fuller, and had experimented with a crude fullering tool i hammered out of rebar, that didn't come out to my liking, so i had an abrupt plan change and will grind out the failed fuller with an angle grinder, and then grind another fuller on the other side, creating a "fuller within a fuller" design. (fuller-ception O.O)  The blade is to have a sharpened quasi clip point, and probably a dark stained handle.  I threw in a picture of the commissioned tanto style blade just for giggles (made from a 24" sawblade). 

Don't think I'm getting on to you, but why would you forge a knife from a material that you can't heat treat?  Right now you've got a letter opener.  Good practice?  Blade quality steel doesn't move like mild steel.  I'd suggest getting a leaf spring from the wrecking yard or better yet buy some 1084 and reading the knife making section.

Keep forging!  ;)