Some of the most common alloys for platinum are:
950 platinum with 50 parts per thousand of ruthenium, creating a good alloy for the making of tubing, then sliced off and machined for machine-tooled, or die struck wedding rings. Pt/Ru has a Vickers hardness of 130. When it is cold hammered, or die struck, the hardness increases to 210. It melts at 1795 C – 1780 C and is widely used in the US, Europe, & Hong Kong. This is the preferred alloy according to the Platinum Guild http://www.preciousplatinum.com and is the alloy that we use in our bands.
950 platinum with 50 parts per thousand of cobalt, creating a good flowing alloy best suited for casting. Pt/Co has a Vickers hardness of 135, and can be hardened through cold hammering to 270, and it is slightly ferro magnetic. This has a melting range of 1770 C – 1680 C This alloy is still used in the US, Europe, & Hong Kong.
950 platinum with 50 parts per thousand iridium. This system has a Vickers hardness of 80 and that can lead to castings that are quite soft. As a fabrication alloy, however 95/5 Pt/Ir can be made reasonably hard through cold-working. It is still used in Germany and Japan for safety catches and pins.
900 platinum with 100 parts per thousand iridium-creating with its added hardness an American favorite for the hand.
950 platinum with 50 parts per thousand of ruthenium, creating a good alloy for the making of tubing, then sliced off and machined for machine-tooled, or die struck wedding rings. Pt/Ru has a Vickers hardness of 130. When it is cold hammered, or die struck, the hardness increases to 210. It melts at 1795 C – 1780 C and is widely used in the US, Europe, & Hong Kong. This is the preferred alloy according to the Platinum Guild http://www.preciousplatinum.com and is the alloy that we use in our bands.
950 platinum with 50 parts per thousand of cobalt, creating a good flowing alloy best suited for casting. Pt/Co has a Vickers hardness of 135, and can be hardened through cold hammering to 270, and it is slightly ferro magnetic. This has a melting range of 1770 C – 1680 C This alloy is still used in the US, Europe, & Hong Kong.
950 platinum with 50 parts per thousand iridium. This system has a Vickers hardness of 80 and that can lead to castings that are quite soft. As a fabrication alloy, however 95/5 Pt/Ir can be made reasonably hard through cold-working. It is still used in Germany and Japan for safety catches and pins.
900 platinum with 100 parts per thousand iridium-creating with its added hardness an American favorite for the hand.
Jewelry Depot
713.789.7977
No comments:
Post a Comment