[chromo]

"The barrel I used in the shop trailer I had used a different style kit and a barrel with removable lid, that one I have had glowing red spots on the sides at times size of old silver dollars. This type I am building I never got that in all the years I've used it."

Well ya, that one is not normal use, only a few times glowed red in small spots, and it's the way I loaded a certain type of wood and the way I was flowing the air etc... and only like 1 or 2 spots a few times. Normally it does not glow at all anywhere. Though I painted that one with a flat black high temp paint. I don't like that paint as it scratches right off very easy.

1200°F Dull red 649°C
1100°F Slight red 593°C
1000°F Very slight red, mostly grey 538°C

Maybe those few small spots were in that range a few times. Only see the glow in the dark, lights out in the room.

My normal wood burner which I am building a new one of same type, and like better, never reaches a straw color or any color!
0390°F Faint Straw 199°C

So I am below 390°F on all parts of it at all times I guess. As for looks or color you can't tell when it's got a fire in it or doesn't, so no color changing here at all.

Not intirely sure that chart applies too well though. I have seen stove pipes I measured the temps near 500°F and they had no colors either, certainly not brown or purple, they were still silver zinc color. Galvanized flues are not good indoors, produce toxic fumes at high heats, so I have replaced them for other people that they were sold to. Beware of hardware stores where sales people don't know anything about what they sell! Selling 6" galvanized heating ducts and elbows for wood burner flue pipe!! NOT GOOD!!!