Great find (7/8″ rock drill), but what alloy?

[FulmenParticipant @fulmen]

Came across two rock drills of this type:

22mm inscribed, appr. 3m long. I wonder what steel it could be, something like chrome moly perhaps? I wonder if I can cut it with a band saw or if I need to bring out the cut off disk.

[Michael GilliganParticipant @michaelgilligan61133]

Having seen how tough such items are … I would recommend using the cut-off disk !

MichaelG.

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Edit: __ Here is one I abused earlier:

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[FulmenParticipant @fulmen]

I have a reasonable suspect. And not quite what I thought, I assumed it would be a basic chrome-moly steel:

https://www.alleima.com/en/technical-center/material-datasheets/bar-and-hollow-bar/hollow-drill-steel/sanbar-20/

C-1.0, Si-0.2, Mn-0.3, Cr-1.0, Mo-0.2

This is closer to a tool steel except for the low Mn.

 

Yeah, I’m not wasting a saw blade on that.

[bernard towersParticipant @bernardtowers37738]

Why would you bother with a piece of material that is so specialist / what the h**l would you use it for???

[Author]

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