Ratnam Steel Ltd. is a distributor of high purity metal powders and compounds including Columbium.  Columbium Round Bars in diameter ranges from 0.125 inches to 4 inches. Columbium Sheet thickness ranges from 0.0005 inches to 0.500 inches. Columbium Round Tube OD ranges from 0.125 inches to 2 inches. Columbium Wire diameter ranges from 0.005 inches to 0.500 inches.  Columbium powder is also in our inventory.  Custom Columbium sizes are also available upon request. Check availability with our sales department to see if Ratnam Steel Ltd. can provide your Columbium metal requirement.

Columbium Information

CAS: 7440-03-1
Chemical Symbol: Cb
Date of Discovery: 1801
Name Origin: Niobe (Daughter of mythical king Tantalus)
Density at 293 K: 8.57 g/cm³
Atomic Number: 41
Atomic Mass: 92.90638 amu
Melting Point: 2477 °C (2750 K, 4491 °F)
Boiling Point: 5017 °C (5015 K, 8571 °F)
Number of Electrons / Protons: 41
Number of Neutrons: 52
Number of Energy Levels: 5
Classification: Transition Metal
Crystal Structure: Cubic Body-Centered
Color: Shiny White

Forms and Shapes Available

Columbium Bars
Columbium Coils
Columbium Foils
Columbium Plates
Columbium Powder
Columbium Rods
Columbium Sheets
Columbium Tubes
Columbium Wire

Known Tradenames

Columbium, Niobium