Does anyone know the name and composition of a type of municipal water service pipe that was used after lead, but before copper? It is grey in color and scratches easily, but not as easy to scratch as lead. (I still see lead quite often in the older parts of the city and can easily identify it). When scratched it is bright silver colored under the service oxidation.
I think there is some lead in the composition, given how soft it is. Some people call it “alloy” or “composite” pipe.
It’s definitely not iron or galvanized steel.
Thanks in advance.