Making non-springy weldon lookalikes - what steel

[NeoTech]

Im planning to make a couple of large size weldon look alike collets. The mill only takes 14mm max  through put and the step over collets only take 20mm max.
And i got a couple of 25-38mm endmills i wanna be able to use in the horizontal setup.

So im thinking i could make couple..
Do these really have to be a hardened steel? I can buy SS1914 leaded steel quite cheap and its easy to machine.. The parts arent gonna be springy and just fix the endmill with a screw..

Would the leaded steel be enough?

[Stilldrillin]

Neo.
I'd guess you're not going to push those cutters anywhere near their limit. 

Keep it short, and a neat fit on the shank, with two holding screws. It should be fine. 

David D

[NeoTech]

I dont even know their limit. ;)

I bought em for their large radius more or less, and they are 6 flute most of em so i guess i really cant take to deep cuts with them. =)
Dormer makes good tools though, 110mm cutting length and 30mm to hold onto.