Rhenium powder

Physical Properties

• CAS Number: 7440-15-5

• Atomic Number: 75

• Melting Point: 3,180°C - 3,186°C (5,756°F - 5,767°F)

• Boiling Point: 5,596°C - 5,627°C (10,105°F - 10,161°F)

• Density: 21.02 - 21.04 g/cm³

• Crystal Structure: Hexagonal Close-Packed (HCP)

• Appearance: Silvery-white or grayish metal/powder

• Mohs Hardness: 7.0

2. Chemical Properties

• Purity: Typically 99.9% to 99.999% (Trace Metals Basis)

• Oxidation: Stable in air at room temperature, but oxidizes above 600°C

• Solubility: Insoluble in water; resistant to HCl and H₂SO₄

• Reactivity: Reacts with hot nitric acid

3. Mechanical Properties

• Ultimate Tensile Strength: >1,172 MPa (at room temp)

• Young's Modulus: 463 GPa

• Vickers Hardness: ~2450 MPa (annealed)

• Ductility: Highly ductile when annealed