Magnesium, Mg; Sand Cast

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Magnesium, Mg; Sand Cast
Categories:	Metal; Nonferrous Metal; Magnesium Alloy; Pure Element
Material Notes:	Sand cast applies only to tensile and/or hardness values; other property values are typical of the element. This entry is for pure Mg; MatWeb has over 125 Mg alloys entries. Magnesium alloys are very low density (1.7 g/cc) and can be treated to reasonably high strengths. Magnesium alloys are available in both wrought and cast forms. Its low density results in its finding uses in many transportation related fields. Many Mg alloys are listed in MatWeb.
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Physical Properties	Original Value	Comments

Density	1.74 g/cc
Viscosity	1.13 cP @Temperature 700 °C
	1.23 cP @Temperature 650 °C
a Lattice Constant	3.209 Å
c Lattice Constant	5.211 Å
Vapor Pressure	1.5e-020 atm @Temperature 25.000 °C
	5.20e-14 atm @Temperature 127 °C
	0.00355 atm @Temperature 650 °C	solid and liquid

Chemical Properties	Original Value	Comments
Atomic Mass	24.3050	1995
Atomic Number	12
Thermal Neutron Cross Section	0.060 barns/atom
X-ray Absorption Edge	9.5117 Å	K
	197.39 Å	L_I
	247.92 Å	L_II
	247.92 Å	L_III
Electrode Potential	-2.37 V
Electronegativity	1.31	Pauling
Ionic Radius	0.660 Å	Crystal Ionic Radius for Valence +2
	0.820 Å	Crystal Ionic Radius for Valence +1
Electrochemical Equivalent	0.454 g/A/h

Mechanical Properties	Original Value	Comments
Hardness, Brinell	30	500 kg load/10 mm ball
Tensile Strength, Ultimate	90.0 MPa
Tensile Strength, Yield	21.0 MPa
Elongation at Break	2.0 - 6.0 %
Modulus of Elasticity	44.0 GPa
Compressive Yield Strength	21.0 MPa
Poissons Ratio	0.35
Shear Modulus	16.3 GPa	Calculated
Coefficient of Friction	0.36	versus magnesium at 20°C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000460 ohm-cm
Magnetic Permeability	1.00001
Magnetic Susceptibility	5.5e-7	cgs/g

Thermal Properties	Original Value	Comments
Heat of Fusion	371.8 J/g
Heat of Vaporization	4760 J/g
CTE, linear	26.1 µm/m-°C @Temperature 20.0 - 100 °C
	27.2 µm/m-°C @Temperature 250 °C
	29.6 µm/m-°C @Temperature 500 °C
Specific Heat Capacity	1.025 J/g-°C
Thermal Conductivity	159 W/m-K
Melting Point	648.3 - 649.3 °C
Boiling Point	1090 °C

Optical Properties	Original Value	Comments
Emissivity (0-1)	0.070 @Temperature 22.0 °C
Reflection Coefficient, Visible (0-1)	0.74	at 1.00 micron
	0.72 - 0.77	at 500 nm
	0.80	at 3.0 micron
	0.93	at 9.0 micron

Component Elements Properties	Original Value	Comments
Magnesium, Mg	100 %

Descriptive Properties
CAS Number	7439-95-4
Crystal Structure	HCP	Space Group P6₃/mmc

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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