76 190.230

Osmium , Os

Osmium is a chemical element that has the symbol Os and atomic number 76. Osmium is a hard, brittle, blue-gray or blue-black transition metal in the platinum family, and is one of the densest natural elements, competing for this status with iridium. Osmium is used in alloys with platinum, iridium and other platinum group metals. Osmium is found in nature as an alloy in platinum ore. Alloys of osmium are employed in fountain pen tips, electrical contacts and in other applications where extreme durability and hardness are needed.


  • Listed below are a selection of some more commonly used sizes. If you do not see anything that suits your needs, please click on the custom request forms and send us your requirements.


Os 3-6mm Pieces 99.9% PureOsmium

Osmium Os,

Purity 99.95%


Osmium-Ruthenium Os-Ru,

Available in various ratios wt% or at%, Purity 99.95%

Os TRG 50.8mm dia. x 3mm Tk 99.99% PureDensity >90%Osmium