Component

Wt. %

Fe + Cr

0.2

Hf

Max 4.5

O

0.16

Zr

Min 99.2

Physical Properties

Metric

English

Comments

Density

6.5 g/cc

0.235 lb/in3

Mechanical Properties

Hardness, Rockwell A

49

49

Estimated from Vickers

Hardness, Rockwell B

78

78

Estimated from Vickers

Hardness, Vickers

150

150

Annealed Sample

Tensile Strength, Ultimate

Min 379 MPa

Min 55000 psi

Tensile Strength, Yield

Min 207 MPa

Min 30000 psi

0.2% YS

Elongation at Break

16 %

16 %

in 50 mm

Modulus of Elasticity

99.3 GPa

14400 ksi

Poisson's Ratio

0.35

0.35

Fatigue Strength

125 MPa

18100 psi

5 E+5 cycles, Notched

Fatigue Strength

145 MPa

21000 psi

3 E+7 cycles, Unnotched

Fatigue Strength

175 MPa

25400 psi

5 E+3 cycles, Unnotched

Fatigue Strength

60 MPa

8700 psi

3 E+7 cycles, Notched

Shear Modulus

36.2 GPa

5250 ksi

Electrical Properties

Electrical Resistivity

3.97e-005 ohm-cm

3.97e-005 ohm-cm

Temp Coefficient is 0.0044/°C at 20°C

Magnetic Susceptibility

1.34e-006

1.34e-006

cgs/g; pure Zr

Critical Magnetic Field Strength, Oersted

47

47

Pure Zr

Critical Superconducting Temperature

0.595 - 0.625 K

0.595 - 0.625 K

pure Zr

Thermal Properties

Heat of Fusion

250 J/g

108 BTU/lb

CTE, linear 20°C

5.89 μm/m-°C

3.27 μin/in-°F

at 25°C

CTE, linear 250°C

6.3 μm/m-°C

3.5 μin/in-°F

CTE, linear 500°C

6.9 μm/m-°C

3.83 μin/in-°F

Specific Heat Capacity

0.285 J/g-°C

0.0681 BTU/lb-°F

Thermal Conductivity

22 W/m-K

153 BTU-in/hr-ft2-°F

Melting Point

1852 °C

3370 °F

Optical Properties

Emissivity (0-1)

0.32

0.32

650 nm; unoxidized pure Zr sample; total