M 95.2 Pt. /4.8% Ru – Platinum Casting Grain (Per Ounce)

The JM 95.2 Pt. /4.8% Ru platinum casting grain is among the most popular platinum alloys among jewelry manufacturers in the U.S. Both alloys contain Ruthenium which is a grain refiner. It gives the alloys a definite structure. This alloyed platinum has an annealed hardness of 120 HV (Vickers hardness) and a working hardness of about 220HV. The platinum alloy also has high tensile strength.

The three properties of Pt/Ru mentioned above make it suitable for machine casting and polishing. This makes it an excellent alloy in the manufacture of rings. You’ll get a bright-colored platinum jewel or item from the .950 platinum casting grains and pieces.

Features & Specifications

• Manufacturer: JM
• Metal Color: White
• Metal Type: Platinum
• Metal Fineness: .950
• Form: Grains/pieces
• 95.2% platinum 4.8% Ruthenium
• Pre-alloyed temperatures (no platinum) 2985°F (1640°C)
• Casting as platinum temperatures 3110°F (1710°C)