COLD- AND HOT-WATER PIPING MADE OF PITTING-RESISTANT COPPER ALLOY

摘要

A cold- and hot-water piping made of a pitting-resistant copper alloy which contains niobium and/or tantalum in a total amount of 0.005-5 wt. %, further contains, if necessary, at least one element selected from among: (i) yttrium and/or zirconium in a total amount of 0.005-1 wt. %, (ii) tin and/or silver in a total amount of 0.05-5 wt. %, (iii) at least one element selected from the group consisting of titanium and R (rare earth elements other than yttrium) in a total amount of 0.005-1 wt. %, and (iv) tungsten in an amount of 0.003-0.5 wt. %, and still further contains, if necessary, phosphorus in an amount of 0.005-0.5 wt. %.