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Old 12-04-2016, 11:31 PM   #11
Brian Rupnow
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Barrie welding in Barrie, Ontario 705-726-1444 carries grey cast iron round bars in 1.5" and 2" diameter. That is where I buy most of my machining supplies.---Brian


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Old 12-05-2016, 03:00 AM   #12
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McMaster Carr will ship to Canada (again). A couple of members have ordered from them recently. All you need is a company name on the bill. (nudge nudge grin grin). Pay all the taxes etc. No problems. And yes unfortunately they ship by UPS.

As mentioned before Terra Nova in Mississauga has lots of cast iron.
http://www.terranovasteel.ca/Lang_ENG/

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Old 12-05-2016, 12:24 PM   #13
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McMaster sells "Easy To Machine Gray" and "Impact Resistant Ductile" cast iron.
Which would be preferred for IC rings?

John
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Old 12-05-2016, 08:10 PM   #14
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Quote:
Originally Posted by dsage View Post
McMaster Carr will ship to Canada (again). A couple of members have ordered from them recently. All you need is a company name on the bill. Sage
Well, you had me all excited there so I called them directly just now. According to the sales rep I spoke with, nothing has changed on their side in terms of policy in past many years. They require business or educational facility & account for Canada. So either your buddies got lucky or had the magic touch.

A few years back (our last attempt) we tried inputting business names which were legitimate & even had corresponding BN's &GST#. The ~ $100 order got as far as checkout & then the popup message saying no-go. We figured it must be electronically flagged by CDN based banking info, or web host, or whatever. Anyway, threw in the towel.

If you don't mind me asking, how much was the collective order?

I did order from about a year ago but it was through a US re-shipper. All legit, they copy/paste the invoice particulars for customs & charge a service fee to place order on your behalf of course. The good part is UPS in USA is cheap & then you can go USPS to Canada. The UPS direct to Canada admin dinger fees can be expensive, like 45$ to ship a box of duty free air.
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Old 12-05-2016, 10:39 PM   #15
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Quote:
Originally Posted by Walsheng View Post
McMaster sells "Easy To Machine Gray" and "Impact Resistant Ductile" cast iron.
Which would be preferred for IC rings?

John
You want to use nodular cast or ductile, not gray for piston rings.
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Old 12-06-2016, 11:58 PM   #16
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You want to use nodular cast or ductile, not gray for piston rings.
Thank you, I have a hunk of that.
What about for a cylinder?

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Old 12-08-2016, 12:27 PM   #17
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petertha:

I guess they got lucky then. They were separate orders at different times. One guy placed his order because the other said he was successful.
I think one of them just ordered some special threaded rod in three foot lengths (or something). Not hundreds of dollars worth in either case.
As I mentioned they both used business names (which was required). So I'm not sure why they were successful. Depends on who handles the order maybe?. Bummer. I too was hopeful. I'll have to inquire some more.

doc1955:
A very simple answer. Can you elaborate as to WHY (nodular or ductile and not grey cast ?).


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Old 12-08-2016, 01:49 PM   #18
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http://www.iron-foundry.com/grey-ductile-iron.html
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Old 12-08-2016, 10:37 PM   #19
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petertha:
doc1955:
A very simple answer. Can you elaborate as to WHY (nodular or ductile and not grey cast ?).
Sage

Nodular the molecules are spherical the grey is like flakes. Nodular is stronger or tougher and more forgiving and doesn't crack or break as easy.
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Old 12-14-2016, 03:43 AM   #20
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George:
Thanks for the link. But after reading it my opinion would be that grey cast would be better for piston rings and cylinders. Since it is described as being more wear resistant and easier to machine. I don't think rings and cylinders require high tensile strength (as per ductile cast) as much as high wear resistance.
Now, I guess it could be that the nodular or ductile cast iron might also be just as wear resistant but it wasn't stated as it's prime attribute. My guess is it probably makes little difference which you use in a model.


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