Zirconium, Zr

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Zirconium, Zr
Categories:	Metal; Nonferrous Metal; Zirconium Alloy; Pure Element
Material Notes:	This entry is for pure Zr; MatWeb also has data sheets for many Zr alloys. Characteristics: Ductile Mechanical Properties similar to titanium and austenitic stainless steel Excellent corrosion resistance Transparent to thermal energy neutrons. Forms adherent, refractory double-oxide layer above 650°C Highly anisotropic, undergoes allotropic transormation from hcp-structured alpha phase to bcc-structured beta phase at 870°C Applications: Superalloys Alloying with Aluminium, Copper, Magnesium or Titanium Water-cooled Nuclear reactors Chemical processing equipment
Vendors:	Eagle Alloys Corporation is a leading supplier of quality metals and alloys. Our staff prides itself on working fast, efficiently and courteously to get you the information you need. Call (800) 237-9012 or visit www.EagleAlloys.com. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Metric	English	Comments

Density	6.53 g/cc	0.236 lb/in³
Vapor Pressure	1.013e-10 bar @Temperature 1574 °C	7.598e-8 torr @Temperature 2865 °F
	1.013e-9 bar @Temperature 1690 °C	7.598e-7 torr @Temperature 3070 °F
	1.013e-8 bar @Temperature 1822 °C	0.000007598 torr @Temperature 3312 °F
	1.013e-7 bar @Temperature 1976 °C	0.00007598 torr @Temperature 3589 °F
	0.000001013 bar @Temperature 2156 °C	0.0007598 torr @Temperature 3913 °F
	0.00001013 bar @Temperature 2367 °C	0.007598 torr @Temperature 4293 °F
	0.0001013 bar @Temperature 2620 °C	0.07598 torr @Temperature 4750 °F
	0.001013 bar @Temperature 2926 °C	0.7598 torr @Temperature 5299 °F
	0.01013 bar @Temperature 3304 °C	7.598 torr @Temperature 5979 °F
	0.1013 bar @Temperature 3783 °C	75.98 torr @Temperature 6841 °F
	1.013 bar @Temperature 4409 °C	759.8 torr @Temperature 7968 °F

Chemical Properties	Metric	English	Comments
Atomic Mass	91.224	91.224	1995
Atomic Number	40	40
Thermal Neutron Cross Section	0.18 barns/atom	0.18 barns/atom
X-ray Absorption Edge	0.68877 Å	0.68877 Å	K
	4.8938 Å	4.8938 Å	L_I
	5.37088 Å	5.37088 Å	L_II
	5.57374 Å	5.57374 Å	L_III
Electronegativity	1.33	1.33	Pauling
Ionic Radius	0.790 Å	0.790 Å	Crystal Ionic Radius for Valence +4
	1.09 Å	1.09 Å	Crystal Ionic Radius for Valence +1
Electrochemical Equivalent	0.844 g/A/h	0.844 g/A/h

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	145	145	Converted from Vickers for 3000 kg load/10 mm ball. Annealed sample
Hardness, Rockwell A	49	49	Converted from Vickers. annealed sample
Hardness, Rockwell B	78	78	Converted from Vickers. Annealed sample
Hardness, Vickers	150	150	annealed sample
Tensile Strength, Ultimate	330 MPa	47900 psi	Annealed
Tensile Strength, Yield	230 MPa	33400 psi	Annealed
Elongation at Break	32 %	32 %	Annealed
Modulus of Elasticity	94.5 GPa	13700 ksi
Poissons Ratio	0.34	0.34
Shear Modulus	35.3 GPa	5120 ksi	Calculated

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000400 ohm-cm	0.0000400 ohm-cm
Magnetic Susceptibility	0.00000134	0.00000134	cgs/g
Critical Magnetic Field Strength, Oersted	47	47
Critical Superconducting Temperature	0.610 K	0.610 K	±0.15; 0.65, 0.95 K for omega Zr.

Thermal Properties	Metric	English	Comments
Heat of Fusion	251 J/g	108 BTU/lb
CTE, linear	5.80 µm/m-°C @Temperature 20.0 - 100 °C	3.22 µin/in-°F @Temperature 68.0 - 212 °F
	6.30 µm/m-°C @Temperature 250 °C	3.50 µin/in-°F @Temperature 482 °F
	6.90 µm/m-°C @Temperature 500 °C	3.83 µin/in-°F @Temperature 932 °F
Specific Heat Capacity	0.285 J/g-°C	0.0681 BTU/lb-°F
Thermal Conductivity	16.7 W/m-K	116 BTU-in/hr-ft²-°F
Melting Point	1852 °C	3366 °F
Boiling Point	4377 °C	7911 °F

Optical Properties	Metric	English	Comments
Emissivity (0-1)	0.32	0.32	650 nm; unoxidized; total

Processing Properties	Metric	English	Comments
Annealing Temperature	>= 705 °C	>= 1300 °F	cold-rolled, in vacuum
	>= 760 °C	>= 1400 °F	hot-rolled
	>= 1000 °C	>= 1830 °F	solution annealing for forged billets

Component Elements Properties	Metric	English	Comments
Zirconium, Zr	100 %	100 %

Descriptive Properties
Alpha Phase Crystal Structure	hcp		< 870°C
Beta Phase Crystal Structure	bcc		> 870°C
CAS Number	7440-67-7

References for this datasheet.

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