Welding cst iron to steel

My guess is that the cast iron is dirty and rusty. Might be easier to secure the cover on with bolts. If the idea is to have it air tight, how about using bolts to secure the cover on, but use cement or epoxy to make it air tight.

=20 Dan

wrote: My guess is that the cast iron is dirty and rusty. ^^^^^^^^^^^^^^^^^^^ It's rusty, but not really dirty. I think I could hit it with my HF grinder to get some clean metal. ^^^^^^^^^^^^^^^^^^^ Might be easier to secure the cover on with bolts. If the idea is to have it air tight, ^^^^^^^^^^^^^^^^^^^ that's the idea ^^^^^^^^^^^^^^^^^^^ how about using bolts to secure the cover on, but use cement or epoxy to make it air tight. ^^^^^^^^^^^^^^^^^^^ That approach would certainly work. I also considered setting half a brick in the opening with mortar. But if welding can be expected to hold somewhat, I could be in and out of there without drilling and tapping, or mixing anything. Thanks for helping me think about this.

You can insert a piece of bar that catches on the inside of the frame that has a hole or two drilled and tapped for a stove bolt in your lid, a bit like a toggle bolt. When you tighten the bolts, it all becomes one. The work can all be done indoors and the installation is easy with a battery drill. You could use a piece of EPDM between the plate and frame to be air tight, etc.

If you're going to use epoxy, how about just glue the cover in with epoxy and call it done?

Use JB Weld.

Can it take the heat?

Cleanout doors at the bottom of a chimney under a fireplace never see any heat.

"Bob La Londe" wrote: Can it take the heat? ^^^^^^^^^^^^^^^^^^^^ No heat to worry about. The opening is on the outside bottom of the ash pit, a few feet from the actual "firebox."

Progress report: I have placed half a brick in the opening, which blocks

I doubt you will find a ready mix truck with mortar mix on it.

Thank You, Randy

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