grey iron
grey iron
How well does grey iron stand up on truck wheels? I think this has been discussed before but I am thinking of having more wheels cast and would like to get some opinions.
Re: grey iron
Depends on how much you are plan on running. Every day, once a week, once a month or once or twice a year. Steel will last longer but costs a lot more. The wheels on the Shay are showing little or no wear after 5 years. My guess is I will wear out before the wheels do.. )
John B
John B
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Re: grey iron
Have them cast in iron and then you could tire them using DOM steel tube once you’ve remachined worn treads to the point there’s not enough material left to return. That’s what I plan on doing with my shay.
-Tristan
Projects
-2.5" scale Class A 20 Ton Shay
Steam Siphon: https://www.shapeways.com/shops/leavitt ... tive-works
Projects
-2.5" scale Class A 20 Ton Shay
Steam Siphon: https://www.shapeways.com/shops/leavitt ... tive-works
Re: grey iron
I agree with Tristan. Both of our RGS20 locos at GGLS have grooves worn into the cast iron wheels. I have put tires on one of the locos so far and will have to do the other one next summer, no doubt. I used DOM tubing from Speedy Metals. With about 0.009" interference, the tires just drop on when heated up to 500 deg F. Our locos get fairly heavy useage, though. So YMMV.
Re: grey iron
If it's trucks on a car they hold up fine. I've got a couple cars with 20+ years on them with iron wheels. If it's trucks on a locomotive I'd go steel.
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Re: grey iron
Ductile (Nodular) cast iron costs only a few pennies more per pound and is just as easy to machine and chips are clean without all the iron dust like grey iron. And the big thing is, Ductile is far better wear resistant on all kinds of rail. Plus,
ductile will not chip and crack like grey. There really is no excuse for using grey iron anymore for wheels.
ductile will not chip and crack like grey. There really is no excuse for using grey iron anymore for wheels.
0-4-0
4-6-0
4-4-2
4-4-0
2-6-0(2)
5 batt elec
44 cars rolling stock
2400' 7 1/2" track
4-6-0
4-4-2
4-4-0
2-6-0(2)
5 batt elec
44 cars rolling stock
2400' 7 1/2" track
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Re: grey iron
So here’s a basic question: how do you tell the difference between gray iron and ductile?
Anybody have photos?
Anybody have photos?
Moderator - Grand Scale Forum
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Re: grey iron
The castings look the same before machining. Gray iron chips look like 6’s and 9’s with a lot of black dust. Ductile makes nice long curls with less dust. Much nicer to machine.
One other difference is that the shrinkage from cooling in the mold is somewhat fussier with ductile. Depending on the casting shape, there is a greater tendency for voids to develop with ductile iron castings, unless remedies such as cores, feeders, etc. are employed when needed.
One other difference is that the shrinkage from cooling in the mold is somewhat fussier with ductile. Depending on the casting shape, there is a greater tendency for voids to develop with ductile iron castings, unless remedies such as cores, feeders, etc. are employed when needed.
Dan Watson
Chattanooga, TN
Chattanooga, TN
Re: grey iron
EMJ has Durabar ------they have a location in Kent WA-----no idea as to stock.
Re: grey iron
McMaster-Carr has both gray iron and ductile iron in billets up to 12" diameter.... It is oversized and is already pickled so there is very little scale. Nice stuff to machine.
BC
BC
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Re: grey iron
Not yet mentioned was whether the majority of the running will be on aluminum or steel rail. Iron and steel wheels are not really bothered by aluminum rail. There have been many reports of iron wheels grooved by steel rail.