Zirconium Tube (ZIRCALOY-4)

Description

1. Product Overview
The ZIRCALOY-4 Zirconium Tube is a precision-engineered, nuclear-grade component designed for extreme-environment applications, most notably as fuel cladding and structural core components in light water reactors (LWRs). Its primary industrial use lies in nuclear power generation, where its unique combination of low thermal neutron absorption cross-section, outstanding corrosion resistance, and high-temperature creep strength ensures reactor safety and operational longevity. Strategically, this product is critical for global energy security and the transition to low-carbon baseload power, offering asset owners a reliable, long-cycle solution that reduces fuel downtime and lifecycle costs.

2. Key Specifications & Technical Characteristics

• Material Composition: Zircaloy-4 (UNS R60804): Sn 1.2–1.7%, Fe 0.18–0.24%, Cr 0.07–0.13%, Zr balance

• Purity / Grade: Nuclear Grade (ASTM B353 / B811) – strictly controlled trace element limits (Hf < 0.010%, O < 0.16%)

• Physical Characteristics:

  • Form: Seamless, cold-worked and stress-relieved (CWSR) or fully recrystallized (RXA) tube

  • Outer Diameter (OD): 9.5 mm – 17.5 mm (customizable)

  • Wall Thickness: 0.4 mm – 1.5 mm (± 0.03 mm tolerance)

  • Density: 6.56 g/cm³

  • Surface: Smooth, oxide-free, passivated inside/out per RCC-C or ASME III

• Packaging Options: Clean-room sealed polyethylene sleeves + inert gas backfill; wooden crated spools for automated fuel fabrication; individual tube sleeves for R&D

• Shelf Life: Indefinite under dry, inert storage (<50% RH, no halogen exposure) – no degradation of mechanical or corrosion properties

3. Core Industrial Applications

• Primary Industries: Nuclear power generation (PWR, BWR, CANDU), research reactors, nuclear fuel fabrication, and isotope production.

• Specific Use Cases:

  • Fuel rod cladding: Encapsulates uranium dioxide pellets – prevents fission product release and withstands >300°C pressurized water.

  • Guide thimbles & instrumentation tubes: Maintains control rod alignment and in-core flux mapping.

  • Pressure tube liners: In CANDU designs, resists deuterium pickup.

• Why ZIRCALOY-4 outperforms alternatives: Unlike stainless steel or Inconel, it has ~20× lower neutron absorption (enabling higher burnup), resists nodular corrosion in high-temperature water, and exhibits negligible hydrogen embrittlement under normal operation. This translates to 18–24 month fuel cycles instead of 12-month cycles – reducing refueling outages and improving plant capacity factor by 1–2%.

4. Competitive Advantages

• Quality consistency: 100% ultrasonic and eddy current testing per ASME Section III; each tube traceable to heat lot with full mechanical (tensile, burst, flattening) and corrosion (autoclave) certification.

• Supply reliability: Dedicated nuclear-grade production line with quarterly pre-shipment audits; buffer stock held in three global hubs (Americas, EMEA, APAC).

• Logistics capability: ISO 19443 (nuclear supply chain) certified packaging and shipping with chain-of-custody documentation; export control compliance (NRC Part 110 / EURATOM).

• Price competitiveness: Fixed-volume annual pricing contracts available to hedge against Zr-sponge market volatility; no premium for tight OD/tolerance batches <500 m.

• Sustainability & technical support: Recyclable Zr scrap buyback program; metallurgical engineering team provides in-reactor performance modeling and failure analysis for cladding optimization.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 250 kg (~1,200 linear meters of standard 12.5 mm OD cladding tube)

• Bulk 20MT Loading Capacity: One standard 20‑foot container holds 18 metric tons of Zircaloy-4 tubes (packed in bundles plus desiccant and cushioning)
  *Note: For 20MT exact, a 40-foot HC container is required (maximum 22MT payload).*