This is an interesting new one on me. I thought brake lines absolutely needed to be made out of steel, but apparently a copper-nickel alloy is significantly superior and Volvo + others have been using it exclusively since the mid-1970s:

http://www.cunifer.com (scroll down to the bottom of the page for links to detailed papers)

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I wonder what the cost difference is. I'm strongly debating on replacing all my hard lines when I R&R the brakes on my Duster, and this sounds like a good idea.

On the subject of hard brake lines, What's the deal with the "coil" of hard lines that I usually see fairly close to the master cylinder? I see alot of people purposefully do that in their custom line installations and I've always wondered what the reasoning is.

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me

Isn't the coil to protect rubbing?

Im too lazy to cut the tube to length, and the spiral solution looks fine. It also provides a good bit of springy slack to get the fitting started.

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madam im adam

As I understand it, the loops between master cylinder and metering block are to allow that line to move/flex with normal car vibration, without fatiguing the metal over time.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Also, I usually see it with body on frame construction where the master is connected to the body and the brake lines to the frame.... Allows some movement between the two.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes