Search found 389 matches

by BClemens
Wed Dec 05, 2018 12:17 am
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

I would be afraid of sand - it can melt. Then you'll have a glass coated casting. BC Oddly enough common sand and iron melt at about the same temperature, so if you haven't melted your casting you won't melt the sand. That depends on the sand, oddly enough.... Glass is still molten even as it hangs...
by BClemens
Tue Dec 04, 2018 7:37 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

Fred, Sometimes an iron casting is cooled too quickly and the result is a 'chilled' casting. That is about as hard as Gray Iron will ever be but that doesn't make it ductile iron - it will become 'chilled' iron. As H_V explains; the conversion from Gray Iron to Ductile Iron is a high temperature pro...
by BClemens
Tue Dec 04, 2018 6:43 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

You will never melt iron in a pottery kiln - so you could go for maximum temperature that the kiln is able to produce for a time period, then do a slow graduated cool down. The maximum temperature and 'soak' time will be variable accordingly with mass of the crystallized casting and max temperature ...
by BClemens
Tue Dec 04, 2018 5:02 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

Thanks. I've been reading about super conducting; very interesting study. Are you any closer to having it work at room temp? The portion of science that we are involved with at the accelerator uses niobium for its cryogenic superconductivity characteristic because it is basically a perfect material...
by BClemens
Tue Dec 04, 2018 4:13 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

Fred, I had a friend that had the same problem with a pile of castings and he fired up his wife's pottery kiln and left them in there for a period of time and then brought them down slowly with the timer and they were able to be machined. This was an electric system that could be controlled well. T...
by BClemens
Tue Dec 04, 2018 4:08 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

So one follow up question. I have a bunch of misc iron castings of unknown origin. How can you tell ductile from gray iron with these existing castings, - E.G. do the two materials look different after machining? Is there some kind of scratch test, or spark test, I could do?? OK, two questions :) T...
by BClemens
Tue Dec 04, 2018 12:34 pm
Forum: Live Steam
Topic: Whistles
Replies: 20
Views: 2997

Re: Whistles

There is an excellent article in Live Steam Magazine on the construction and tuning of steam whistles. I built a four chime one from the article and it sounds pretty nice. It is made using 1 1/2" brass tubing - it's about 10 - 11 inches long.... There is one on the Green Goddess that does that gurgl...
by BClemens
Tue Dec 04, 2018 12:21 pm
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

would coal or charcoal be best for heating it up? I believe either would do fine. Coal coke would be the best and maybe even too much heat if you blast air through it. Like a blast furnace or blacksmith's hearth. You could get it too hot. Iron will distort with too much heat - but that's pretty hot...
by BClemens
Tue Dec 04, 2018 11:03 am
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

Fender wrote:
Tue Dec 04, 2018 11:00 am
Probably, wood ashes would make a better insulating cover than sand.
I would be afraid of sand - it can melt. Then you'll have a glass coated casting.
BC
by BClemens
Tue Dec 04, 2018 10:49 am
Forum: Live Steam
Topic: grey iron
Replies: 43
Views: 7544

Re: grey iron

Fred, If iron cools too fast, especially from molten, it crystallizes and becomes very hard. The guys are saying to heat it up to red heat and let it cool as slowly as you can. That will 'draw' it back down to a softer state. Same as annealing tool steel after quenching it from red heat - draw it ba...
by BClemens
Mon Dec 03, 2018 2:24 pm
Forum: Live Steam
Topic: looking for NG wheel castings
Replies: 4
Views: 1302

Re: looking for NG wheel castings

Fred, RMI has 5" and 5.5" and they are 1.25" thick. The wheels that are not specified for 1.5" scale are for the NG equipment either 2.5" of 3.75" scale NG. They also have the traditional flange depth (.188") and a .250" flange depth as well. We bought some of the 5" NG steel wheels from them and th...
by BClemens
Mon Dec 03, 2018 9:18 am
Forum: Live Steam Marketplace
Topic: set of 8 cast iron wheels - unmachined - On sale now - $45
Replies: 5
Views: 1856

Re: set of 8 cast iron wheels - unmachined - On sale now - $45

What would the maximum rim width that these would finish? Greater than one inch wide?
BC