ASTM B550 Zirconium and Zirconium Alloy Bar and Wire
- Type: Bars and Wire
- Grade R60702—Unalloyed zirconium
- Grade R60704—Zirconium-tin alloy
- Grade R60705—Zirconium-niobium
ASTM B550/B550M Zirconium and Zirconium Alloy Bar and Wire
Golden Sunbird Metals supplies premium ASTM B550 zirconium and zirconium alloy bar and wire engineered to deliver exceptional corrosion resistance and low neutron absorption. Available in three grades—R60702 (unalloyed Zr702), R60704 (zirconium-tin), and R60705 (zirconium-niobium)—these bars and wires are offered in hot-finished, cold-finished, annealed, and stress-relieved conditions across rounds, squares, hexagons, flats, and custom shapes. Ideal for nuclear reactor components, chemical processing equipment, medical implants, aerospace structures, and specialty metallurgy, our ASTM B550 products meet stringent mechanical property requirements while ensuring biocompatibility and long service life. With EN 10204 3.1/3.2 certification and precise dimensional control, GS Alloy delivers reliable, high-performance zirconium solutions tailored to your project specifications. Contact us today for a competitive quote and fast global delivery.
- Grade R60702—Unalloyed zirconium.
- Grade R60704—Zirconium-tin alloy.
- grade R60705—zirconium-niobium.
Chemical Composition (wt.%) of ASTM B550 Zirconium and Zirconium Alloy Bar and Wire
| Element | Grades R60702 | Grades R60704 | Grades R60705 |
| Zirconium + Hafnium (min) | 99.2 | 97.5 | 95.5 |
| Hafnium (max) | 4.5 | 4.5 | 4.5 |
| Iron + Chromium | 0.2 (max) | 0.2 to 0.4 | 0.2 (max) |
| Tin | – | 1.0 to 2.0 | – |
| Hydrogen (max) | 0.005 | 0.005 | 0.005 |
| Nitrogen (max) | 0.025 | 0.025 | 0.025 |
| Carbon (max) | 0.05 | 0.05 | 0.05 |
| Niobium | – | – | 2.0 to 3.0 |
| Oxygen (max) | 0.16 | 0.18 | 0.18 |
Mechanical Properties of ASTM B550 Zirconium and Zirconium Alloy Bar and Wire
| Property | Grades R60702 | Grades R60704 | Grades R60705 |
| Tensile Strength (min, ksi) | 55 [380] | 60 [415] | 80 [550] |
| Yield Strength (min, ksi) | 30 [205] | 35 [240] | 55 [380] |
| Elongation (min, %) | 16 | 14 | 16 |
Features
- ASTM B550/B550M zirconium and zirconium alloy bar and wire in three grades: R60702, R60704, and R60705.
- Available in hot-finished and cold-finished conditions, with annealed, cold worked, and stress-relieved options.
- High corrosion resistance and low neutron absorption characteristics, making zirconium suitable for demanding service environments.
- Supplied in round, square, octagon, hexagon, and flat forms to support machining and fabrication.
- Clean, smooth surface finish with inspection certificate options available for quality-critical projects.
Technical Specifications
| Specification | Value |
| Standard | ASTM B550/B550M Zirconium and Zirconium Alloy Bar and Wire |
| Grade | Grade R60702—Unalloyed zirconium (Zr702), Grade R60704—Zirconium-tin alloy (Zr704), Grade R60705—zirconium-niobium (Zr705) |
| Condition & Finish | Annealed, cold worked, and stress relieved; clean, smooth surface finish |
| Type | Bars and Wires |
| Size | Bars: (Condition: hot finished, hot finished and annealed, cold finished, cold finished and annealed) Hot-finished round, squares, octagons, and hexagons Diameter or Size:≥6.4mm Hot-finished flats Size: Width 6.4-254mm x Thickness≥3.2mm Cold-finished rounds, squares, octagons, hexagons, and shapes Diameter or Size:≥13mm Cold-finished flats Size: Width≥9.5mm x Thickness≥3.2mm Wire: (Condition: cold finished, cold finished and annealed) Cold-finished rounds, squares, octagons, hexagons, and shapes Diameter or Size:≤13mm Cold-finished flats Size: Width: 1.6-9.5mm x Thickness: 0.25-4.8mm |
| Length | Upon the customer’s request |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical analysis, Tensile test, Hardness test, and Non-destructive test (UT) |
Applications
- Nuclear industry components, including reactor-related parts and other low-neutron-absorption uses.
- Chemical processing equipment such as tanks, piping, heat exchangers, valves, pumps, and reactor parts.
- Medical instruments and selected implant-related components where biocompatibility is valued.
- Aerospace and other corrosion-resistant structural parts that need good workability and long service life.
- Steelmaking and alloying additions in specialty metallurgical applications.
