V70: Wheels/Brakes - Material of the brake pipe?

myvolvoforumsuser · Jul 19th, 2020, 12:45

Hi,

While replacing the brake hose I managed to breake the plastic coating on the brake pipe.

I thought that the pipes where made of copper, but the color of the pipe tells me diffrent.

What material does volvo use for the brake pipes? Steel? I’m afraid of rust...

The car is a v70, 2010

Tatsfield · Jul 19th, 2020, 14:37

Have you tried putting a magnet on it and seeing if it is steel? If it's not copper, which is subject to metal fatigue, it may well be cupro-nickel which is the best material for brake pipes and is a silver colour.

myvolvoforumsuser · Jul 19th, 2020, 15:05

Quote:

Originally Posted by Tatsfield

Have you tried putting a magnet on it and seeing if it is steel? If it's not copper, which is subject to metal fatigue, it may well be cupro-nickel which is the best material for brake pipes and is a silver colour.

Just tried with magnet, and it attached to the brake pipe, so it’s steel i guess!

Tatsfield · Jul 20th, 2020, 00:13

Not necessarily. Cunifer brake piping can be magnetic depending upon the level of nickel in it. It has about 2% iron and 10 to 20% nickel but some alloys have great nickel content and that when combined with the iron content allows them to be attracted by a magnet. Cu ni fer is Cu (copper) + ni (nickel) + fer (Iron). Your piping may still be Cunifer but it is more expensive than steel so I suppose it will depend on how Volvo viewed their quality issues. Sorry to mislead with the magnetic test but I didn't realise that some Cunifer alloys used for brake lines had higher nickel content.

myvolvoforumsuser · Jul 20th, 2020, 07:34

Quote:

Originally Posted by Tatsfield

Not necessarily. Cunifer brake piping can be magnetic depending upon the level of nickel in it. It has about 2% iron and 10 to 20% nickel but some alloys have great nickel content and that when combined with the iron content allows them to be attracted by a magnet. Cu ni fer is Cu (copper) + ni (nickel) + fer (Iron). Your piping may still be Cunifer but it is more expensive than steel so I suppose it will depend on how Volvo viewed their quality issues. Sorry to mislead with the magnetic test but I didn't realise that some Cunifer alloys used for brake lines had higher nickel content.

No worries, It was a good idea(if it wasn’t magnetic), i apprechiate the reponse!

Jul 19th, 2020, 12:45	#1
myvolvoforumsuser New Member Last Online: Mar 3rd, 2021 21:10 Join Date: Sep 2016 Location: sthlm	Material of the brake pipe? Hi, While replacing the brake hose I managed to breake the plastic coating on the brake pipe. I thought that the pipes where made of copper, but the color of the pipe tells me diffrent. What material does volvo use for the brake pipes? Steel? I’m afraid of rust... The car is a v70, 2010

Jul 19th, 2020, 14:37	#2
Tatsfield Premier Member Last Online: Apr 25th, 2024 17:47 Join Date: Nov 2015 Location: Poole	Have you tried putting a magnet on it and seeing if it is steel? If it's not copper, which is subject to metal fatigue, it may well be cupro-nickel which is the best material for brake pipes and is a silver colour. __________________ 2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey

Jul 20th, 2020, 00:13	#4
Tatsfield Premier Member Last Online: Apr 25th, 2024 17:47 Join Date: Nov 2015 Location: Poole	Not necessarily. Cunifer brake piping can be magnetic depending upon the level of nickel in it. It has about 2% iron and 10 to 20% nickel but some alloys have great nickel content and that when combined with the iron content allows them to be attracted by a magnet. Cu ni fer is Cu (copper) + ni (nickel) + fer (Iron). Your piping may still be Cunifer but it is more expensive than steel so I suppose it will depend on how Volvo viewed their quality issues. Sorry to mislead with the magnetic test but I didn't realise that some Cunifer alloys used for brake lines had higher nickel content. __________________ 2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey

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