Pipe-Lok Vales & Fittings Company delivers precision-engineered instrumentation fittings and valves trusted for reliability, safety, and performance in industrial applications with a strong focus on engineering excellence and quality control.
Niobium (Columbium) offers excellent resistance to mineral acids and good high-temperature stability, used for VCR fittings in specialty chemical processing and high-purity applications.
A refractory metal with good resistance to acids and molten alkali metals, along with excellent superconducting and high-temperature properties.
| Element | Weight Percentage (%) |
|---|---|
| Niobium (Nb) | 99.8 min |
| Tantalum (Ta) | 0.10 max |
| Tungsten (W) | 0.05 max |
| Iron (Fe) | 0.01 max |
| Titanium (Ti) | 0.02 max |
| Oxygen (O) | 0.015 max |
| Nitrogen (N) | 0.01 max |
| Carbon (C) | 0.01 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
Niobium offers good ductility and formability with resistance to a range of acidic media at elevated temperatures.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 275 MPa min |
| 0.2% Yield Strength | 186 MPa min |
| Elongation | 20% min |
| Hardness | 80 HB max |
| Density | Approx. 8.57 g/cm³ |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the VCR fitting component.
High-performance material specifications for our complete VCR Fittings range.
Engineered for demanding fluid and gas-handling systems where leak-tight sealing, corrosion resistance and long service life are essential.
Handles the most aggressive acids and oxidizing media in specialty chemical production.
High-purity systems where corrosion resistance and product purity are essential.
Lightweight, high-strength components for demanding aerospace applications.
Exceptional resistance to seawater and chloride-rich marine environments.
Ultra-pure fluid handling in semiconductor fabrication processes.
Used in nuclear and specialty reactor applications requiring extreme corrosion resistance.