I have an A20 Super Salamander crucible with probably 40 to 50 hours melting 50-55 pound batches of iron in an oil-fired furnace. I notice the walls appear to be getting thinner. It is still working fine, but how do I know if it is at risk of collapsing? I have a replacement sitting in reserve. Information is appreciated.
How thin is it getting from any flux erosion and wear?. Don't know about your clay graphite but I've seen silicon carbide ones half as thick as they were when new.
(cost of new crucible) divided by (How many pours have you done?) = Cost per pour VS Cost of one doctor bill if it breaks next time. When in doubt, throw it out. You'll know it's finished when the hairs stand up on your neck because of fear.
https://scontent-mia3-1.xx.fbcdn.ne...=c20ecde534fa39e140098fd2e59563a1&oe=5B80F85C I did one last pour with this one then retired it ... I was about 5 pours past safe
For me it'd be cost per pour vs pain if it breaks next time, since the doctor bill for all the skin grafts etc. would be $0 up here in Canada. Jeff
