Try Online metals for O-1 in 1X6" flat stock. That should make a nice size solid construction axe with a drifted eye.
One method that is both fun and makes a very high grade axe is welding in a bit. Use 4140 for the body and 1080/1095/W2 for the bit. After rough forging the shape down to about 1/2" thick on the cheek, cut a 1/2" deep slot in the edge. Open t up and set a piece of 1/4" high carbon steel in the slot and close it up. Slip out the bit and clean it and the slot up good, then reinsert and weld up solid. If you have a big piece of wrought iron it makes a really good looking poll with a hard steel bit.
If you have 1/4 to 3/8" flat stock, cut the bar into a "butterfly" and make the poll in the wrap style, then weld the bit between the two cheek pieces of the "U". This is the simplest type of hawk and axe construction. ( Experiment on paper to figure out the "butterfly shape needed. It is basically a left and right profile joined at the butt .. see below)
Aldo (NJSB) has 1075 in .375" thick stock. You can wrap that and set the weld so one cheek piece is 3/4" longer than the other, thus moving the weld way back from the edge when forged to shape. A 48" bar of 3" by .375" is $75. 4"X48" is $100. That will make a bunch of axes. Sell one and the bar is paid for.
Honestly, I would buy good grade commercial axe handles.
Now, for those reading all this and wondering about making it even cooler ....
Get a big billet of thick random pattern Alabama Damascus. You can call them and say you need a billet 4" wide, 10" long, and .375" thick.
You can also make your own, it doesn't need to be high carbon. A perfect blend would be 203E and 1075. That will show a bold layer pattern. High layer count isn't needed either, unless you want to.Anywhere over 100 layers will look great.
Cut it in a "butterfly" shape so when you wrap it it forms the base for the poll.
Make the bit piece from a 1.5X4" piece of 1075/1084/1095/ W-2 ... whatever you have on hand. I would use something around .375" thick stock for an axe.
Weld it up and start forging to shape and drift the eye to shape.
To draw the butterfly, draw two parallel 4" lines 8" apart. Draw an X from corner to corner. Place the ruler( normally about 1" wide)across thebtop corners and draw a line from one diagonal to the other. Repeat on the bottom. You now have a butterfly shape. Fora larger or smaller head, change the height and distance.
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