Please forgive me a little bad English again:)
Tech Reborn version:TechReborn-1.12.2-2.23.2.1007-universal
Reborn Core version:RebornCore-1.12.2-3.14.1.457-universal
Forge version:14.23.5.2838
When industrial blast furnace which using advanced machine casings(the highest level) and 2 buckets of vanilla lava，it has just 2880 heat.So it cannot smelt hot tungstensteel ingot(3000 heat) when just use vanilla minecraft and tech reborn:(
Please fix it.Thanks!

OK! Thanks a lot!

You need to use coils to get to 3k heat. Either kanthal or nichrome.

To help you further. That table tells you how to achieve the needed temperatures.