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What are thread forming flat dies made of

I have a steel bin with junk, and a big part of it are thread forming dies that are rectangle shaped. I am curious what are they usually made of. A2/D2 or HSS?

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Reply to
Ignoramus31819
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If you're talking about cylindrical thread-forming dies, they're high-end HSS (usually M4 or above). If they're flat dies for cold-rolling, D2. Hot-rolling dies are other tool steels; I forget which.

Reply to
edhuntress2

thanks

Reply to
Ignoramus20940

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