Chromium, Cr; Annealed

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Chromium, Cr; Annealed
Categories:	Metal; Nonferrous Metal; Pure Element
Material Notes:	Annealed applies only to tensile and/or hardness values; other property values are typical of the element.
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Physical Properties	Original Value	Comments

Density	7.19 g/cc

Chemical Properties	Original Value	Comments
Atomic Mass	51.9961	1995
Atomic Number	24
Thermal Neutron Cross Section	2.9 barns/atom
X-ray Absorption Edge	2.07 Å	K
	18.256 Å	L_I
	21.226 Å	L_II
	21.5958 Å	L_III
Electrode Potential	-0.560 V
Electronegativity	1.66	Pauling
Ionic Radius	0.520 Å	Crystal Ionic Radius for Valence +6
	0.630 Å	Crystal Ionic Radius for Valence +3
	0.810 Å	Crystal Ionic Radius for Valence +1
	0.890 Å	Crystal Ionic Radius for Valence +2
Electrochemical Equivalent	0.971 g/A/h

Mechanical Properties	Original Value	Comments
Hardness, Brinell	80	Converted from Vickers for 500 kg load/10 mm ball Brinell test.
Hardness, Knoop	102	Converted from Vickers
Hardness, Rockwell B	48	Converted from Vickers
Hardness, Vickers	90
Charpy Impact, Unnotched	2.00 J	Unspecified Heat Treatment.

Electrical Properties	Original Value	Comments
Electrical Resistivity	5.00e-7 ohm-cm @Temperature -260 °C
	0.0000130 ohm-cm @Temperature 20.0 °C
	0.0000180 ohm-cm @Temperature 152 °C
	0.0000200 ohm-cm @Temperature 200 °C
	0.0000310 ohm-cm @Temperature 407 °C
	0.0000400 ohm-cm @Temperature 600 °C
	0.0000470 ohm-cm @Temperature 652 °C
	0.0000660 ohm-cm @Temperature 1000 °C
Magnetic Susceptibility	0.0000035	cgs/g

Thermal Properties	Original Value	Comments
Heat of Fusion	293.1 J/g
Heat of Vaporization	5945 J/g
CTE, linear	6.20 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.461 J/g-°C
Thermal Conductivity	69.1 W/m-K
Melting Point	1860 °C
Boiling Point	2671 °C

Optical Properties	Original Value	Comments
Emissivity (0-1)	0.10 @Temperature 50.0 °C	polished, total radiation
Reflection Coefficient, Visible (0-1)	0.70	500 nm

Component Elements Properties	Original Value	Comments
Chromium, Cr	100 %

Descriptive Properties
CAS Number	7440-47-3

References for this datasheet.

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