Knife from old speargun shafts

T

TangoDelta

Joined
Apr 8, 2021
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I am curious if anyone has ever made a life from old speargun shafts - the carbon spring steel ones. I have a bunch of bent Rob Allen shafts - and assume they might hold a decent edge?
 
The problem is you don't know what they mean by "Spring Steel". If you want to try, you could bundle several together and make a twist billet. A Canister Damascus billet would also be a good way to use them. You will have to guess at the HT, but using the parameters for 5160 would be the best guess.
 
They are an oil quenched steel, and meant to be tempered down to about 2100mpa which is roughly equivelent to 55 RC if I read things correctly.

Should make decent knife but at 7mm round would require some sort of consolidating for a use able amount of material.

I've got a heap of them lying around too. Great quality shafts, don't seem to mind to bad if you shoot the odd rock fish.

I've taken to bending them with a bit of heat and making them into brackets. Have one for belts, and have also made a fin holder for the boat out of them
 
Yes I see what you are saying about consolidating material.
Do you think there would be enough to forge arrow broad heads? And do you think they would work for this?
 
If using with canister Damascus you can make it as wide a billet as you desire. If you're talking about forging only a single shaft, then look at the diameter, 1/4" 5/16"? Or perhaps a large 3/8" shaft. Even with drawing any longer a 3/8" shaft isn't going to forge very wide at all, perhaps somewhere between 1/2" and 3/4" wide forged out with the waste that will occur during forging.

What equip do you have for forging?
 
I have a 2 brick propane forge, and a hammer and sledge hammer head! So not very advanced at all!! But I am keen to learn and grow...
 
I bet you could make paring knives or a bird & trout from 'em. And that's a nice moderate target to start with. Give it a go and report back!
 
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