Zr702 Zirconium 90 Degree Elbow | ASTM B363
- Manufactured to ASTM B363 standard for zirconium welding fittings
- Made from Zr702 (UNS R60702) with Zr + Hf ≥ 99.2%
- 90-degree long radius elbow for smooth flow and minimal pressure drop
- Outstanding corrosion resistance in hydrochloric, sulfuric, nitric, and organic acids
- Immune to stress corrosion cracking (SCC); high resistance to pitting and crevice corrosion
- Low neutron absorption cross-section — ideal for nuclear applications
- Available in sizes 1/2" to 8", with custom sizes upon request
- Butt weld and socket weld connection option
- Pressure ratings: Class 150, 300, 600
- Surface finishes: pickled, polished, smooth
Description Of Zr702 Zirconium 90 Degree Elbow | ASTM B363
R60705 Zirconium Bar is a high-performance zirconium-niobium alloy (Zr-2.5Nb) manufactured through vacuum arc remelting, forging, and precision machining. It is alloyed with niobium to increase its strength and improve its formability compared to commercially pure zirconium. Zr705 offers approximately twice the tensile strength of Zr702, making it the material of choice for high-pressure and high-temperature applications where the strength of pure zirconium is insufficient.
Zirconium 705 is composed of 95.5% minimum zirconium and hafnium (with a maximum hafnium content of 4.5%), alloyed with 2.0% to 3.0% niobium. It forms a stable, dense, self-healing protective oxide layer that provides exceptional corrosion resistance. This protective oxide layer can be further enhanced through a heat treating process, creating a robust barrier that serves as an excellent bearing surface and imparts impressive erosion resistance in high-velocity systems.
R60705 zirconium bars are widely used in nuclear reactor structural components, chemical processing equipment, heat exchangers, and other high-performance engineering applications. They exhibit good ductility even at cryogenic temperatures and strength comparable with other common engineering alloys. The material complies with ASTM B550/B550M, the standard specification for zirconium and zirconium alloy bar and wire. Custom diameters, lengths, and surface finishes are available upon request.
Applications Of Zr702 Zirconium 90 Degree Elbow | ASTM B363
Nuclear Industry: Fuel rod cladding, pressure vessels, heat exchangers, and reactor structural components. Zr705's low neutron absorption cross-section and excellent corrosion resistance in high-temperature water and steam make it ideal for nuclear applications.
Chemical Processing: Heat exchangers, condensers, reaction vessels, columns, and piping systems handling strong acids and corrosive media. Zr705 offers superior corrosion resistance compared to Zr702 and is used where higher strength is required.
Hydrogen Generation: Heat exchangers and structural components for nuclear hydrogen generation using thermochemical processes that involve the decomposition of hydroiodic acid at temperatures up to 400°C.
Petrochemical Industry: Pumps, valves, and reactor linings exposed to strong acids and corrosive environments.
Medical Gas Pipeline Systems: Components for medical gas delivery systems requiring high purity and corrosion resistance.
Oil and Gas: Downhole tools, wellhead equipment, and pipeline systems where corrosion resistance and high strength are required.
Aerospace and Marine: Structural components and seawater-cooled equipment requiring lightweight, high-strength, and corrosion-resistant materials.
Specifications Of Zr702 Zirconium 90 Degree Elbow | ASTM B363
| Parameter | Specification |
|---|---|
| Material | Zirconium-niobium alloy (Zr-2.5Nb) |
| UNS Designation | R60705 |
| Zirconium + Hafnium, min | 95.5% |
| Hafnium, max | 4.5% |
| Niobium (Columbium) | 2.0 – 3.0% |
| Iron + Chromium, max | 0.20% |
| Hydrogen, max | 0.005% |
| Nitrogen, max | 0.025% |
| Carbon, max | 0.05% |
| Oxygen, max | 0.18% |
| Density | 6.64 g/cm³ |
| Melting Point | 1840°C |
| Tensile Strength | ≥552 MPa |
| Yield Strength (0.2% offset) | ≥379 MPa |
| Elongation | ≥16% |
| Hardness (Rockwell B) | 80 |
| Diameter Range | 6 – 150 mm (customizable) |
| Length | Customizable |
| Surface Finish | Pickled, machined, polished |
| Product Standard | ASTM B550 / ASME SB-550 |