Chromium metal
Properties
Chemical symbol: Cr
Name: Chromium
CAS No.: 7440-47-3
Molar mass: 52.00 g/mol
Density: 7.19 g/cm³
Melting point: approx. 1907 °C
Boiling point: approx. 2672 °C
Mohs hardness: approx. 8.5
Color: silvery white with metallic luster
Form: flakes, pieces, granules or powder
Chromium is a transition metal and one of the most important alloying elements in modern metallurgy. In its pure form, chromium is a silvery-white, highly lustrous and very hard metal. It is commercially available as electrolytic flakes, pieces, granules or powder. With a melting point of approximately 1907 °C, chromium is suitable for demanding metallurgical and high-temperature applications.
One of the most characteristic properties of chromium metal is its high hardness of approximately 8.5 on the Mohs scale, making it one of the hardest pure metals. Chromium also offers excellent resistance to corrosion and tarnishing.
When exposed to air, chromium immediately develops an extremely thin and dense passive layer of chromium(III) oxide, Cr₂O₃. This self-healing protective film prevents further oxidation and provides resistance against acids and other aggressive environments.
At room temperature, chromium exhibits antiferromagnetic behavior with a Néel temperature of approximately 311 K. High-purity chromium metal is mainly produced industrially by aluminothermic reduction of chromium(III) oxide or by electrolysis from chromium-containing solutions.
The element chromium is particularly important in stainless steel, tool steels, heat-resistant alloys and specialty metals. Chromium metal improves hardness, hardenability, wear resistance, high-temperature strength and corrosion resistance in many alloy systems.
Would you like to buy chromium? Auremo offers chromium in various forms for metallurgical and technical applications. The chromium price, chromium metal price and chromium price per kg depend on purity, product form, order quantity and delivery conditions.
Advantages
• Excellent corrosion and scaling resistance
• Self-healing Cr₂O₃ passive layer
• Very high material hardness
• Improves abrasion and wear resistance of alloys
• Excellent tarnish resistance
• Maintains a metallic appearance in demanding environments
• Improves steel hardenability
• Enhances high-temperature strength and durability of alloys
Applications
• Stainless steels containing at least 10.5% chromium
• Tool steels and specialty steels
• Heat-resistant and high-temperature alloys
• Hard chrome plating of cylinders and tools
• Decorative chrome plating
• Automotive and sanitary applications
• PVD and CVD thin-film technology
• Sputtering targets
• CrN and CrC protective coatings
• Nickel- and cobalt-based superalloys
• Aerospace applications
• Gas turbine blades and other thermally stressed components
Auremo offers chromium and other specialty metals for industrial applications. If you have any questions about chromium metal, available purity grades, product forms or delivery conditions, please contact us directly.
