Zirconium 702 Forgings
What are Zirconium 702 forgings?
Zirconium 702 forgings are components shaped by controlled hot working of commercially pure zirconium. Reactor grades have hafnium removed to keep neutron absorption low; industrial grades such as Grade 702 retain up to 4.5% hafnium, which doesn’t affect corrosion resistance. The forge heats this reactive metal inside a narrow temperature window, refining grain and closing voids. The finished forging offers excellent corrosion resistance, high ductility and toughness, and good weldability.
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Zirconium 702 Forgings Specifications
Material Grade
Zirconium 702 (Commercially Pure Zirconium)
UNS Number
R60702
ASTM Specification
ASTM B493, ASTM B550, ASME SB551
Product Forms
Forged rings, discs, shafts, blocks, sleeves, flanges, bushings, nozzles
Forging Process
Open-die forging; custom forging to customer drawings
Size Range
As per customer drawings and application requirements
Surface Finish
Machined, pickled or as-forged
Heat Treatment Condition
Annealed
Inspection Standards
Ultrasonic Testing (UT), PMI Testing, chemical analysis, mechanical testing, dimensional inspection, visual inspection
Certification
EN 10204 3.1 Mill Test Certificate
Types of Zirconium 702 Forgings
Forged Rings
Forged Discs
Forged Shafts
Forged Blocks
Forged Sleeves
Forged Flanges
Forged Nozzles
Forged Bushings
Open Die Forgings
Custom Zirconium Forged Components
Reach out to Metracore Alloys for reliable Zirconium 702 Forgings solutions.
Technical Details of Zirconium 702 Forgings
Chemical Composition
| Element | Zirconium + Hafnium (Zr + Hf) | Hafnium (Hf) | Iron (Fe) | Chromium (Cr) | Oxygen (O) | Nitrogen (N) | Carbon (C) | Hydrogen (H) |
| Content (% by weight) | 99.2 min | 4.5 max | 0.20 max (Fe + Cr combined) | 0.20 max (Fe + Cr combined) | 0.16 max | 0.025 max | 0.05 max | 0.005 max |
Mechanical Properties
| Property | Tensile Strength | Yield Strength (0.2% offset) | Elongation | Hardness | Density | Melting Point |
| Value | 379 MPa min | 207 MPa min | 16% min | 89 HRB max | 6.51 g/cm³ | 1852°C |
Key Features
Eight performance characteristics matter most in severe chemical service.
- Acid resistance: The grade withstands hydrochloric, sulphuric and organic acids that corrode stainless steels and nickel alloys.
- pH Tolerance: Streams that alternate between acidic and alkaline media pose no problem; zirconium tolerates both pH extremes.
- High-temperature stability: Strength and corrosion behaviour hold steady at reactor and heat exchanger temperatures.
- Ductility and toughness: It maintains its ductility and toughness at a high level after forging, so parts absorb thermal cycling without cracking.
- Excellent weldability: Fabricators join the grade with inert gas-shielded processes.
- Decades of service are realistic, since corrosion wall loss stays negligible in acid duty.
- Low maintenance: Inspection intervals lengthen, and spare part demand falls.
- Performance remains dependable in harsh service where high pressure meets aggressive process chemistry.
Inspection & Manufacturing Standards
Recognised standards govern every forging we supply, from melting through final inspection.
- ASTM B493 governs zirconium forgings
- ASTM B550 covers bar stock
- ASTM B551 applies to any sheet or plate feedstock supplied alongside them, and ASME SB551 applies to pressure code work
- An EN 10204 3.1 mill test certificate accompanies each consignment
- Source mill inspection covers ultrasonic testing (UT), PMI testing, chemical analysis and mechanical testing
- Dimensional and visual inspection close-out for each order
Advantages of Zirconium 702 Forgings
The commercial case for this grade rests on lifetime operating cost rather than purchase price. Six advantages carry the most weight.
- Exceptional corrosion resistance across diverse process chemistries
- High purity and structural integrity from controlled forging
- Excellent performance in acidic environments, including reducing acids
- Long operational service life with minimal wall loss
- Reduced maintenance costs over the equipment’s working life
- Reliable performance in critical process equipment
Manufacturing Process of Zirconium 702 Forgings
Zirconium 702 Forgings Industrial Applications
Products
Exporter, Manufacturer & Supplier of Zirconium 702 Forgings in various grades, sizes, shapes and specifications.
FAQs
What are Zirconium 702 forgings?
Zirconium 702 forgings are hot-worked components of commercially pure zirconium, specified where strong acids attack conventional alloys.