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I Forge Iron

Dave Leppo

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Posts posted by Dave Leppo

  1. OK, i hate to admit this, butt...

    Hit myself in the eye with the hammer once - rebounding off the anvil - missed the workpiece (trying to hammer in a really tight area, in my defence)

    Perscription safety glasses saved me - I didn't even get a shiner! was hard enough to knock the glasses off my face and bend them up pretty good.

  2. I asked about stainless on the GURU'S DEN @ ANVILFIRE.COM. I was forging 300 series stainless items for the bathroom and they were rusting. "Quenchcrack's" response - Friday, 08/22/08 19:10:39 EDT

    - Glenn, if this is a policy violation I urge you to delete this post

    This does NOT violate IForgeIron policy but is in direct violation of Anvilfire policy. Anvilfire policy is that NO AMNONT of text can be copied from the Anvilfire site, no matter how small, without permission from the Anvilfire. The responce has been reworded to pass along the information without violating the Anvilfire policy.

    The stainless steel 300 series is high in nickel and chromium. 300 series with an L is for low carbon and you most likely, by getting it hot enough to form chromium carbides, depleted the chromium. The surface formation of chromium oxide is used to protect it from additional oxidation, which will not be cured by surface passivization. The carbides must be dissolved to release the chromium. Heating to 1800F-2000F and water quench will release them, and dissolve the chromium barbides which will prevent their re=precipitation. Use the L version in the future, as it does not require the additional heat treatment.

    This I did with later items – heating to bright red-orange and quenching. Cant tell you if this worked or not – OK so far.

  3. I am fortunate enough to work in a steel fab shop, and I take home scrap & drops, and occasionally buy new pieces of flat bar directly from the company at our supply cost.

    of course, i make sure to pay promptly for these purchases, and I made the shop foreman a nice oak leaf / acorn hook to return the favor of letting me raid the scrap dumsters.

  4. Auctions are fun, but you do have to be careful. This past saturday, I saw a guy buy a post drill. he was excited to get it for les than $100, till he realized that he had bought the drill, and not the portable forge next to it! he walked away in disgust, and didn't even bid on the forge!

  5. Also: Rust blueing - allowing / encouraging the part to rust in a controlled manner, then boiling it in distilled or rain water to change the rust to black. This is a very old gun finish technique.

  6. if the 6" material is the kind with a lock seam, you can snap two together to make a 12" dia pipe. Its not as good as a fabrcated 12" pipe; it tends to want to oval. If you stagger the seams 90 degrees when you join the pipe sections together, it helps in counteracting the oval effect. You still probably have to go by more, because you will use twice as much for a given length of pipe

    My apologies if this has already been addressed.

    By the way, I vote agaised the smoke shelf, onthe grounds that it is a holdover from masonry construction, and not needed in steel chimneys. More important to have an opening at the forge less than the smallest area of the main stack, to maintain entrance velocity. IMHO

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