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I Forge Iron

Forging 4340

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I need some help with a piece of 4340 that I have. I am interested in making some blacksmithing tools out of a 2-5/8" dia. bar of 4340. I am a little confused about the proper way to harden and temper this material.

I would like to make a nice sledge hammer head and possibly some hardy tools.

Have any of you ever worked with this type of steel and have some wisdom to share?


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