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RE: Cu-Ni vs. Ni-Cu vs. Stainless

To: "Roy" <techman@metrolink.net>, <triumphs@autox.team.net>
Subject: RE: Cu-Ni vs. Ni-Cu vs. Stainless
From: Gernot von Hoegen <avac@totalise.co.uk>
Date: Tue, 28 Sep 1999 16:25:19 +0100
>===== Original Message From "Roy" <techman@metrolink.net> =====
>>>re: tubing types>>
>
>Stainless, Cu-Ni and Ni-Cu are all used in marine environments because of
>their corrosion resistance. Copper-Nickel (Cu-Ni) looks very similar to
>copper because it is an alloy of mostly copper. The copper is essentially
>"corrosion resistant" and the nickel gives it a little better strength and
>some more corrosion resistance. But, it will still corrode (it will get that
>"green gunk" look that copper alloys get). On the other hand, Nickel-Copper
>(Ni-Cu) alloy is also corrosion resistant due to the high nickel content and
>this alloy looks very close to stainless ("silvery"). It has much higher
>strength than Cu-Ni. Its advantage is that it is less susceptible to stress
>corrosion cracking under high stress, high temperature, and corrosive
>environment than certain stainless alloys (304 SST for example). The most
>common stainless alloys are 304, 316 and 403. These are all pretty resistant
>to seawater and should be fine for brake fluid.
>
>This info is from when I used to work on nuclear submarine reactor plant
>equipment for 13 years where each of these alloys are used extensively. Now
>that you have more info than you probably cared for, I'd go with the
>stainless tubing. If the Ni-Cu is cheaper, that would be O.K. too.
>
>Roy Malac
>'60 TR3   TS63103LO (in restoration)
>techman@metrolink.net


Fine fine, however I would go for cu-ni-fer which is the widely accepted 
version of the tubing for automotive applications. ther is more information 
about that on my website if anyone cares to read it.

Cheers, Gernot

............Gernot von Hoegen................
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