Welcome to Freelong New Material's premium niobium bar round collection. Our high-grade cylindrical niobium bars deliver exceptional performance for your most demanding applications. Manufactured in China's Titanium Valley, these precision-engineered bars meet strict ASTM B392 standards with purity levels exceeding 99.95%. Whether you need reliable components for aerospace, electronics, or chemical processing, our niobium bar round products provide the durability and consistency your projects require.
Our round niobium bars feature diameters ranging from 6mm to 120mm with lengths up to 2000mm. Each bar undergoes rigorous quality testing to ensure optimal performance in high-temperature and corrosive environments.
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| Grade | RO4200 | RO4210 | Nb1 | Nb2 | NbZr1 | C-103 | |
| Content (max. wt%) |
Zr | 0.02 | 0.02 | 0.02 | 0.02 | 0.8~1.2 | 0.7 |
| Ti | 0.02 | 0.03 | 0.002 | 0.005 | 0.02 | 0.7~1.3 | |
| C | 0.01 | 0.01 | 0.01 | 0.02 | 0.01 | 0.015 | |
| N | 0.01 | 0.01 | 0.015 | 0.05 | 0.01 | 0.015 | |
| O | 0.015 | 0.025 | 0.015 | 0.025 | 0.015 | 0.023 | |
| H | 0.0015 | 0.0015 | 0.001 | 0.005 | 0.0015 | 0.002 | |
| Ta | 0.1 | 0.3 | 0.1 | 0.25 | 0.1 | 0.5 | |
| Fe | 0.005 | 0.01 | 0.005 | 0.03 | 0.005 | - | |
| Si | 0.005 | 0.005 | 0.005 | 0.02 | 0.005 | - | |
| W | 0.03 | 0.05 | 0.03 | 0.05 | 0.03 | 0.5 | |
| Ni | 0.005 | 0.005 | 0.005 | 0.01 | 0.005 | - | |
| Mo | 0.01 | 0.02 | 0.01 | 0.05 | 0.01 | - | |
| Cr | 0.002 | - | 0.002 | 0.01 | 0.002 | - | |
| Hf | 0.02 | 0.02 | - | - | - | 9.0~11.0 | |
| Nb | Remain | Remain | Remain | Remain | Remain | Remain | |
| Grade | Tensile strength δbpsi (MPa), ≥ | Yield strength δ0.2, psi (MPa),≥ | Elongation in 1"/2" gage length, %, ≥ |
| RO4200-1 | 18000 (125) | 12000 (85) | ≥25 |
| RO4210-2 |
Material Grade: Pure Niobium (Nb)
Standard: ASTM B392 / GB/T 13810
Diameter Range: φ3.0-100mmmm
Length: Up to 2000mm
Purity: ≥99.95%
Melting Point: 2477°C
Density: 8.57 g/cm³
Surface Finish: Smooth, polished
Tolerance: ±0.1mm
You'll find our niobium bar round products essential across multiple industries:
Aerospace & Aviation: Jet engine components, heat shields, turbine parts
Electronics: Capacitor manufacturing, superconducting materials
Chemical Processing: Reactor vessels, heat exchangers, piping systems
Medical Devices: Implants, surgical instruments, MRI equipment
Nuclear Industry: Reactor components, fuel rod cladding
Research & Development: Laboratory equipment, specialized tooling
Quality remains our top priority throughout production. Every niobium bar round undergoes comprehensive testing including:
Our quality management system ensures consistent results that meet your specifications every time.
Ready to discuss your niobium requirements? Our technical team stands ready to help you select the perfect solution for your application.
Email: jenny@bjfreelong.com
WhatsApp: +86 13571190943
We respond quickly to all inquiries and provide detailed technical support to ensure you get exactly what you need. Whether you're sourcing for a single project or establishing long-term supply relationships, we're here to serve your needs with professionalism and expertise.










Baoji Freelong New Material Technology Development Co., Ltd loated in Baoji City--China's Titanium Valley,we are mainly doing Zirconium,Titanium,Nickel,Niobium,Tantalum etc metal material and other alloy's produce,OEM and Sales.and also exporting the goods what we make. we have a lot of trustful clients and partner.and also we were authority by some firms.At present,we were build our relationship with Australia,Korea,German,US,UK,Malaysia,AZ,Middle East,Taiwan,Etc. Our company always take the quality and service as our responsibility,We always get close even match the quality what our customer wanted and as for quality,we never say no and no reason for quality failure.
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WhatsApp&Wechat: 86 13571190943
E-mail:jenny@bjfreelong.com
Address: No.188. Gaoxin Ave, Baoji City, Shannxi, China.

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