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Material for cold chisel or punch?

Material for cold chisel or punch?

Material for cold chisel or punch?

(OP)
I'm looking for the best material to use for a special punch that needs to withstand heavy hammer blows - It will be about 10" overall, with a 6" (152mm)long body diameter of 0.65" (16.5mm) for clearance. One end will be 1" diameter and radiused for hammer impact. The other end screws into the target part with a 3/4-10 UNC thread.

I found 6150 and 8620 could be used. Since this will be used in cold climates, some 5% nickel alloys looked like they might be better.

Punch can be heat treated after machining if needed - your recommendations/specs would be greatly appreciated!

Thanks

"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut."
-- by Albert Einstein

RE: Material for cold chisel or punch?

The "S" series of tool steels typically get used for such service. That would be S1,S2, S% or S7.

RE: Material for cold chisel or punch?

Yes, these will require heat treating. And that would be "S5" not "S%".

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