There is a major difference between durability and scratch resistance. Here is a comparison of the Platinum alloys:Īs you can see, Pt/Ru has the most tensile strength, whereas Pt/Co has the highest scratch resistance. Durability is determined by strength, and scratch resistance is determined by hardness. Strength is measured in pounds per square inch (PSI). e deeper the impression, the softer the metal. The hardness of these alloys is measured in Vickers hardness (HV) Vickers is a rl1eans of determining the hardness of a metal by pushing a pointed object into the surface of the metal with a determined load and then measuring the penetration. Platinum 950 alloyed with 50 parts Ruthenium, called Pt950/Ru.Platinum 950 alloyed with 50 parts Cobalt, referred to as Pt950/Co.Platinum 950 alloyed with 50 parts iridium, referred to as Pt950/l r.Platinum 900 alloyed with 100 parts Iridium, referred to as Pt90011r.
In the US the most commonly used Platinum alloys are: different hardness and thus a greater scratch resistance. There are, however different alloys that have a. From the finest steel to the finest Platinum! no metal is immune to scratching. It seems the consumer equates durability with scratch resistance and is then disappointed when the Platinum jewelry scratches and shows signs of wear. One of the most frequently asked questions about Platinum concerns scratching.
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