bronze identification

[bobc]

i am working on a hydraulic manipulator that was built in germany probably 50-60 years ago. this is a 60 ton forge manipulator that uses water as the hydraulic medium at 100 bar accumulator pressure.
i am re-manufacturing some of the old valving and the print is in german, no problem in itself, except the material designation for the valves reads as NiAlBz F70.
i know it is aluminum bronze but which specific type ?
is the F 70 a hardness or copper content or alloy coding ?
my supplier was of no help.
this is a check valve between the pumps and the accumulators.
thanks,
bobc

 

[tinker]

Hi
I don't know but I did a quick check for NiAlBz on Google.com without the F70 designation and got dozen or so hits.
All were German, this one here had a english translation.

http://www.nymetal.dk/dk/culeg/main.htm

Blessings to you in Christ
Tim