On Friday, March 23, 2018 at 5:23:23 AM UTC+11, GB wrote:
One handle is broken on our large saucepan, so I made a rather crude
wooden handle and glued it to the lugs. Only then did my son tell me
that this is the saucepan that goes in the oven, for stews.

I stuck it in the oven at 150C for a few hours, and quite a bit of resin
has oozed out of the wood, but the wood isn't burning.

I've just turned it up to 180C, and I'll keep an eye on it.

Any idea how hot it can go before it chars or bursts into flames? I'm
told that sometimes stews go up to 200C.

Perhaps a heat-shrinkeable Silicone rubber sleeve over the glued assembly might help prevent the adhesive heating and meleting or cracking up.
I used an metal_based epoxy (bought in an Autospares outlet) for a similar handle of a round metal pan and it withstood high heat of a gas fleme stove.