Rhenium

Rhenium

General Characteristics
Rhenium is a silvery-white metal with one of the highest melting points of all elements, exceeded by only tungsten and carbon. It is also one of the densest, exceeded only by platinum, iridium and osmium. Its usual commercial form is a powder, but this element can be consolidated by pressing and sintering in a vacuum or hydrogen atmosphere. This procedure yields a compact solid having a density above 90% of the density of the metal. When annealed this metal is very ductile and can be bent, coiled or rolled.

Typical uses:

Aviation- Rhenium is added to nickel based super-alloys to improve creep-strength.

Petroleum Industry- Rhenium-Platinum alloys are used in creating catalysts used to manufacture lead-free, high octane gasoline.
Typical Chemical Composition

Weight % Rhenium

Typical Composition 99.99

Physical Properties

Characteristics		English	Metric
Nominal density	20°C / 68°F	0.7598 lbs/in³	21.03 g/cm³
Melting point		5760 °F	3180 °C
Specific heat	25 °C/ 77°F	0.033 BTU/lb – °F	138 J/KG- °K
	500 °C/ 932°F	0.032 BTU/lb – °F	134 J/KG- °K
	1000°C/1830°F	0.0385 BTU/lb – °F	161 J/KG- °K
	1500°C/2730°F	0.0423 BTU/lb – °F	177 J/KG- °K
	2000°C/3630°F	0.0476 BTU/lb – °F	199 J/KG- °K
Average coefficient of thermal expansion Linear	20 °C/ 68°F	3.44 micro in/in- °F	6.20 micro m/m- °K
	250 °C/ 482°F	3.44 micro in/in- °F	6.20 micro m/m- °K
	500 °C/ 932°F	3.40 micro in/in- °F	6.12 micro m/m- °K
	1000°C/1830°F	3.69 micro in/in- °F	6.65 micro m/m- °K
Thermal conductivity		22.9 BTU/ft- hr – °F	39.6 W/m – °K

Mechanical Properties

Temper Tensile Hardness Shear

Ultimate Elongation

at break
Modulus of

Elasticity
Hardness

Vickers
Modulus

KSI MPa % KSI GPa KSI GPa

Annealed 155 1070 15-25 68000 469 170 25500 176
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General Characteristics
Rhenium is a silvery-white metal with one of the highest melting points of all elements, exceeded by only tungsten and carbon. It is also one of the densest, exceeded only by platinum, iridium and osmium. Its usual commercial form is a powder, but this element can be consolidated by pressing and sintering in a vacuum or hydrogen atmosphere. This procedure yields a compact solid having a density above 90% of the density of the metal. When annealed this metal is very ductile and can be bent, coiled or rolled.

Typical uses:

Aviation- Rhenium is added to nickel based super-alloys to improve creep-strength.

Petroleum Industry- Rhenium-Platinum alloys are used in creating catalysts used to manufacture lead-free, high octane gasoline.
Typical Chemical Composition

Weight % Rhenium

Typical Composition 99.99

Physical Properties

Characteristics		English	Metric
Nominal density	20°C / 68°F	0.7598 lbs/in³	21.03 g/cm³
Melting point		5760 °F	3180 °C
Specific heat	25 °C/ 77°F	0.033 BTU/lb – °F	138 J/KG- °K
	500 °C/ 932°F	0.032 BTU/lb – °F	134 J/KG- °K
	1000°C/1830°F	0.0385 BTU/lb – °F	161 J/KG- °K
	1500°C/2730°F	0.0423 BTU/lb – °F	177 J/KG- °K
	2000°C/3630°F	0.0476 BTU/lb – °F	199 J/KG- °K
Average coefficient of thermal expansion Linear	20 °C/ 68°F	3.44 micro in/in- °F	6.20 micro m/m- °K
	250 °C/ 482°F	3.44 micro in/in- °F	6.20 micro m/m- °K
	500 °C/ 932°F	3.40 micro in/in- °F	6.12 micro m/m- °K
	1000°C/1830°F	3.69 micro in/in- °F	6.65 micro m/m- °K
Thermal conductivity		22.9 BTU/ft- hr – °F	39.6 W/m – °K

Mechanical Properties

Temper Tensile Hardness Shear

Ultimate Elongation

at break
Modulus of

Elasticity
Hardness

Vickers
Modulus

KSI MPa % KSI GPa KSI GPa

Annealed 155 1070 15-25 68000 469 170 25500 176

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