What steel for a drilling jig?

[M&J]

I have a small run of parts I want to drill for interchangeability and a drilling jig would enable this.

About 50 holes will be done so something that can have just enough hardness to maintain the run is desired. Is there a steel that can attain just enough hardness using a propane or MAP gas blow torch available?

Suggestions you may have are welcomed.

[jimmontg]

How many holes are in the part to be drilled? Is it 50 holes per part or like 10 parts with 5 holes each? If you're just drilling 2 to 5 holes you can use or make drill bushings out of round stock and torch the bushing.

[M&J]

Two holes but there may be a variation so possibly 4 holes. I'll look into some round stock. Some of the woodworking dowel fixtures would work but those are more $ then I want to spend. The ironic part is none of my local shops have them. I'd talked to one of the shops and he said for some reason they've had a run on the dowel joinery fixtures.