ASTM B493 Zirconium and Zirconium Alloy Forgings
- Type: Forged Rings, Blocks, Flat Bars, Disc, etc
- Grade R60702/Zr702 — Unalloyed zirconium.
- Grade R60704/Zr704 — Zirconium-tin.
- Grade R60705/Zr705 — Zirconium-niobium.
ASTM B493 Zirconium and Zirconium Alloy Forgings
Golden Sunbird Metals supplies premium ASTM B493 zirconium and zirconium alloy forgings engineered for exceptional corrosion resistance and low neutron absorption in the most demanding nuclear and chemical environments. Available in three grades—R60702 (unalloyed Zr702), R60704 (zirconium-tin Zr704), and R60705 (zirconium-niobium Zr705)—these forgings are offered as forged rings, bars, blocks, discs, and flat bars in annealed, cold-worked, or stress-relieved conditions. Dimensions include rings up to OD 2000 mm, bars up to 6000 mm long, and blocks/discs tailored to your drawings. Ideal for nuclear reactor structural components, chemical processing equipment (reactors, heat exchangers, columns, piping), acid-handling systems, medical implants, and aerospace structures, our ASTM B493 forgings deliver proven mechanical performance and long service life. Supplied with EN 10204 Type 3.1 or 3.2 certification and full testing (chemical analysis, tensile, NDE), GS Alloy provides reliable, high-performance zirconium forging solutions tailored to your exact specifications. Contact us today for a competitive quote and fast global delivery.
- Grade R60702/Zr702—Unalloyed zirconium.
- Grade R60704/Zr704—Zirconium-tin.
- Grade R60705/Zr705—Zirconium-niobium.
Chemical Composition (wt.%) of ASTM B493 Zirconium and Zirconium Alloy Forgings
| Element | Grade R60702/Zr702 | Grade R60704/ZR704 | Grade R60705/ZR705 |
| Zirconium + Hafnium (min %) | 99.2 | 97.5 | 95.5 |
| Hafnium (max %) | 4.5 | 4.5 | 4.5 |
| Iron + Chromium (max %) | 0.2 | 0.2 to 0.4 | 0.2 |
| 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 |
Permissible Variation in Check Analysis Between Different Laboratories
| Element | Permissible Variation (%) |
| Hydrogen | 0.002 |
| Nitrogen | 0.01 |
| Carbon | 0.01 |
| Hafnium | 0.1 |
| Iron + Chromium | 0.025 |
| Tin | 0.05 |
| Niobium | 0.05 |
| Oxygen | 0.02 |
Tensile Requirements of ASTM B493 Zirconium and Zirconium Alloy Forgings
| Grade | Tensile Strength (min MPa [ksi]) | Yield Strength (min MPa [ksi]) | Elongation in 50 mm [2 in.] (min %) |
| R60702/Zr702 | 380 [55] | 205 [30] | 16 |
| R60704/Zr704 | 415 [60] | 240 [35] | 14 |
| R60705/Zr705 | 485 [70] | 380 [55] | 16 |
Features
- ASTM B493/B493M zirconium and zirconium alloy forgings in three grades: R60702, R60704, and R60705.
- Available as forged rings, blocks, flats, and discs to support heavy-duty fabrication needs.
- Supplied in annealed condition with clean, smooth surface finish for further processing.
- R60702 is unalloyed zirconium, R60704 is zirconium-tin alloy, and R60705 is zirconium-niobium alloy.
- High corrosion resistance and low neutron absorption characteristics for demanding industrial and nuclear service.
- Suitable for machining, forging, and custom fabrication in critical applications.
Technical Specifications
| Standard | ASTM B493/B493M Zirconium and Zirconium Alloy Forgings |
| Grade | Grade R60702/Zr702, Grade R60704/Zr704, Grade 60705/Zr705 |
| Condition & Finish | Annealed, cold worked, and stress relieved; clean, smooth surface finish |
| Type | Forged rings, Forged bars, Forged Blocks, Forged disc/disk |
| Dimension | Ring Size: OD 200- 2000mm x ID 100 -1500mm x Height: 20 – 800mm |
| Bar Size: Dia. 200 – 600mm x Length: 1000 – 6000mm | |
| Block Size: Length: 150 x 6000mm x Width: 80 – 300mm x Height: 50 – 150mm | |
| Disc Size: Dia.200-1500mm x Thickness: 50 – 150mm | |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical Analysis, Tensile Test, NDE Test |
Applications
- Nuclear industry components, including reactor-related structural parts and low-neutron-absorption service.
- Chemical processing equipment such as reactors, heat exchangers, columns, and piping systems handling corrosive media.
- Acid-handling and corrosion-resistant process equipment for aggressive environments.
- Medical implants and biocompatible components, especially for R60702.
- Aerospace and other high-strength, corrosion-resistant structural parts.
- Specialized superconducting or advanced-engineering components as secondary applications.
