Chemical Resistance of Tungsten

 Hydrochloric Acid  Resistant to attack
 Sulphuric Acid  Resistant to attack
 Nitric Acid  Resistant to attack
 Aqua Regia - cold  Resistant to attack
 Hydrofluoric Acid  Resistant to attack
 Caustic Soda, Aqueous Solution  Resistant to attack
 Ammonia to 700 °C  Resistant to attack
 Mercury / Mercury Vapor  Resistant to attack
 Air / Oxygen to 400 °C  Resistant to attack
 H2O  Resistant to attack
 Hydrogen  Resistant to attack
 Nitrogen  Resistant to attack
 Carbon Monoxide to 800 °C  Resistant to attack
 Hydrogen / Chloride Gas to 600 °C  Resistant to attack
   
 Air / Oxygen above 400 °C  Reacts under certain conditions
 Ammonia with H2O2  Reacts under certain conditions
 Ammonia above 700 °C  Reacts under certain conditions
 Sulphur - molten, boiling  Reacts under certain conditions
 Carbon Monoxide above 800 °C  Reacts under certain conditions
 Chlorine above 250 °C  Reacts under certain conditions
 Hydrogen Sulphide at red heat  Reacts under certain conditions
   
 Aqua Regia - warm to hot  Not resistant to attack
 Hydrofluoric / Nitric mix  Not resistant to attack
 KNO3, KNO2, KClO3,  Not resistant to attack
 PbO2  Not resistant to attack
 Sodium Nitrite - molten  Not resistant to attack
 Carbon above 1400 °C  Not resistant to attack, forms carbide
 Aluminum Oxide  Not resistant to attack, forms oxide
 Magnesium Oxide  Not resistant to attack, forms oxide
 Thorium Oxide  Not resistant to attack, forms oxide
 H2O vapor at red heat  Not resistant to attack, forms oxide
 CO2 above 1200 °C  Not resistant to attack, forms oxide
 Sulphur Dioxide at red heat  Not resistant to attack, forms oxide
 Fluorine  Not resistant to attack
 Bromine  Not resistant to attack
 Iodine  Not resistant to attack
 Nitric Acid - hot  Not resistant to attack
 Carbon Disulphide at red heat  Not resistant to attack

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Midwest Tungsten Service
540 Executive Drive
Willowbrook, IL 60527
Toll Free: 1-800-626-0226
Phone: 1-630-325-1001
Fax: 1-630-325-3571

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