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DAE think the 'never pour over 2500F' rule is just shop lore?
I hit 2700F on a bronze pour yesterday and the cast came out cleaner than any I've done at the 'safe' temp. The extra heat let the metal fill a complex mold detail that always gave me trouble. Has anyone else pushed the temp limits on purpose?
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zarak186mo ago
Whoa, careful there. I think you might be mixing up your scales. 2700 degrees Fahrenheit is way, way hotter than any bronze pour. That's getting into steel territory. Most bronze is poured between 1800F and 2100F. Hitting 2700F would likely burn out the tin and cause major problems. Maybe your thermocouple needs a check? In my shop, going over 2100F makes the metal fume and the cast gets grainy.
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kellyj236mo ago
What kind of problems show up first when the tin starts to burn out?
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noraj796mo ago
Ugh, I feel this so hard. I once had a cheap pyrometer go totally wonky on me. It told me the melt was perfect, but when I poured, it was like cold syrup. Ruined a whole flask. That grainy, fumed surface he's talking about is the worst. Solidarity on the thermocouple check, for sure.
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