Fire place liner
 

I have to put a liner in a fire place, what steel would be the best to use?

Thick.

Sorry, that might come across a bit harsh. But anything that is not gold plated
expensive really will all perform similarly. Thicker is better.

Now if you can swing it 316 stainless will last longer. 302/303/304 only slightly
better than mild steel.

Inconel would be the best but yeah you ain't gonna buy that shit.

How thick are we talking?

Unlike wimmen, thicker is better, but I would try to go with 1/4".

The question is this for daily use or occasional hey the wife wants a nice cozy atmosphere 2-4 time a winter...

We watch the fireplace channel on TV.

Can you find some Corten ?
My thought is, that most of the time, it's at room temp, and all oils/paint have been burned off, so that's when the rusting happens.

Corten is just HSLA steel, it will not hold up any better than mild steel to
this kind of heat.

I wasn't thinking about the heat, rather the rusting when cool.

Corten rusts, look at shipping containers.

Is concrete or brick an option? You'd never see steel in an open fireplace over here. (Unless it's a back boiler or a gas/electric pretend fireplace)

I was wondering too if this was a masonry fireplace or a wood stove.

Its a fire place with a metal insert surrounded by masonry

The one I am working on was built in when the fire place was built

Are you putting a steel plate vertical in the back or an over head steel plate. Is there a burn through spot you are trying to cover?

Ahhh, we'd call that an insert or inset stove. Over here a fireplace is an open fire.

When that was made it was built from 3 or 4mm mild steel, nothing special I'd imagine. If it was really expensive maybe 5 or 6mm but still only regular mild steel id imagine

Yes, it does.
But it rust's like cast iron does.

Ummm no it does not, I can prove it... come over and I will show you on my container.

Replacing the back and sides, back and one side were shot, finally got them burned out today and new peaces made, had to use a torch and skim the old liner our because of another plate behind them. Replacing them with 1/4" plate

You gotta love taking out a layer with a torch with another behind .

Ought to work.:)

Tomorrow is the day I pre mitered the corners hoping for no gaps

Looks great.

How did you do the bends?

Corten is known as the rusting steel.
Maybe the recipe or name has changed ?

Thank's I was able to do the short bends in my brake but hat to slice, heat and bend the back.

Or it was just marketing...:devil:

Not exactly Ron. Rust yes, but there is a purpose to the rust.

Like I said come see the rust through holes in my container that have been patched...

Alright, Corten is a brand name for ASTM A588 Weathering steel. A588 is indeed an HSLA grade, but not all HSLA is A588 (or weathering steel for that matter). A588 surface rusts very quickly, but that rust sort of encapsulates the steel beneath it slowing down further rusting. You won't see sheets of rust flaking off of A588. It's commonly used on RR bridges, not just because of the added yield strength over conventional A992, but because they don't have to paint it. Also, if you're going to use A588 for it's weathering properties, you ought to use the welding consumables to weld it as well.
Otherwise you're defeating the purpose. Another misconception out there is that HSLA (including A588) is produced to pass yield/tensile test and NOT to a specific chemistry. That is false - they must pass both.

All that being said, the surround looks great Ted! For the application I don't think anything mentioned is going to last any appreciably amount longer than the other with the exception of inconel or 316 stainless, but in that case I'd bet it would crack due to expansion sooner than anything else - maybe not if it's not too restrained.

It still rusts through.

Another place Corten is widely used is debris bodies on vacuum trucks and sewer cleaner trucks.