Zirconium

Zirconium is a reactive metal; it has a high affinity for oxygen and as such forms a protective oxide film that enables it to perform well in a wide variety of conditions.
Atomic No. 40
Atomic Wt. 91.22
Specific Gravity 6.51
Melting Point 1852˚C
Coefficient of Thermal Expansion 5.8 X 10^-6/°K
Specific Heat 0.066 cal/g/°K
Ultimate Tensile Strength (Room Temperature, Annealed) 55 ksi
Yield Tensile Strength (Room Temperature, Annealed) 30 ksi
Poisons Ratio 0.35
Modulus of Elasticity 14.4 X 10⁶ psi
Stress Relief Temperature 565˚C

General Corrosion Resistance

Zirconium exhibits superb corrosion resistance in most organic and inorganic acids, salt solutions, strong alkalis and a few molten salts. The passive oxide film (corrosion barrier) is stable in both reducing and oxidizing conditions. Zirconium is excellent in both acidic and basic solutions. The temperature limit for use in air is about 450˚C to 500˚C.

This data is based on laboratory testing only. Your in-plant results may differ. Testing is recommended under other conditions as needed.

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