SMS: Stainless Metric Stock - The UK's leading distributer of metric stainless steel

The UK’s leading distributor of metric stainless steel

Image representing Metal Glossary

Metal Glossary

Copper Metal Glossary (P)


Patina

The greenish layer that naturally develops on Copper exposed to the atmosphere. Chemically it is a complex mixture of Chlorides, Carbonates and Sulphides. Pre-patinated sheet is used for roofing applications.


Phosphor Bronze, Leaded Phosphor Bronze

Hard and strong cast and wrought Copper/Tin alloys with small, deliberate, Phosphorus additions. Wrought alloys such as PB102 contain 4% to 8% Tin, whilst cast alloys contain 9% to 12% Tin. Leaded Phosphor Bronzes, with Lead contents up to 20% ,are usually available only as castings – Examples are PB1 and SAE660.