Brake Lines - Steel vs Copper vs Copper-Nickel

[Fireblade69]

Whilst trying to change rubber pipes for braided lines on my track car I've managed to mangle a solid to rubber union, (yes I did use a brake pipe spanner!), and now the pipe has to be replaced. It's one of the fronts and it is clipped to the bulkhead behine the damned engine so is bloody hard to get to for a steel replacement as they tend to be a bit inflexible. I'd also have to get one prepared & supplied ready to go and was wondering on doing a copper replacement but heard that copper-nickel are as flexible and have a higher burst pressure.

Anyone have any advice/suggestions as to whether copper is fine, copper-nickel is great or whether the steel lines are a must?

[Fireblade69]

Cheers guys. I know a guy with a flaring kit suitable for steel but it's vise mounted and he reckon's it can't be used under the wheel arch as it's a pain in the arse. I might invest in one of the more cost effective versions available and go for that Cunifer. Can't see me using it too much anyway.