Zr-4 rod

1. Product introduction
Zr-4 (Zircaloy-4) is a classic nuclear-grade zirconium alloy of the zirconium-tin series. It uses zirconium as the matrix, adds tin, iron, and chromium, and does not contain nickel. It is currently one of the most mature rods used in nuclear power, high temperature, high pressure, and strong corrosion conditions.
1. Typical ingredients (wt%)
Zr: margin
Sn: 1.2～1.7%
Fe: 0.18～0.24%
Cr: 0.07～0.13%
Impurities and gas elements are strictly controlled
2. Key physical properties
Melting point: about 1850℃
Thermal neutron absorption cross section: extremely low, about 0.18 barn, very suitable for use in nuclear reactors
3. Mechanical properties (common values in annealed state)
Tensile strength: ≥415 MPa
Yield strength: ≥240 MPa
Elongation: ≥20%
4. Core features
Excellent corrosion resistance under high temperature and high pressure water/steam environment
Low hydrogen absorption rate and good hydrogen embrittlement resistance
Neutron economy is good and the structural strength is moderate
Good welding performance and forming performance
Can be turned, polished, pickled, and heat treated for delivery
5. Common specifications
Diameter: Φ3～Φ120mm
Length: 1000~6000mm, can be customized as needed
Delivery status: annealed state (M), cold working state

2. Main application areas
1. Nuclear industry (most important use)
Nuclear fuel components: fuel rod end plugs, grid rods, positioning pins, guide tubes
Reactor internal structural parts and supports
Widely used in pressurized water reactors, boiling water reactors, heavy water reactors, etc.
2. Chemical anti-corrosion equipment
Stirring shafts, pump shafts, valve stems, and fasteners under strong corrosion conditions
Hydrochloric acid, acetic acid, urea, sea water, chlor-alkali, high temperature and high pressure water and other environments that stainless steel cannot handle
Heat exchangers and reactor internal components
3. Medical and special fields
Surgical instruments and implant blanks that are partially resistant to corrosion by body fluids
Deep-sea equipment, aerospace corrosion-resistant structural parts

Quality Control and Testing

Each product undergoes rigorous inspection before shipment:

Dimensional Inspection: Precise measurement of thickness, length, and width

Chemical Composition and Mechanical Property Analysis: Third-party testing reports

Surface Inspection: Visual and microscopic inspection for defects

Ultrasonic Testing: Detection of internal defects

Why Choose Us

Technology and Quality: Located in Baoji, China's Titanium Valley, we possess professional production technology and extensive experience in non-ferrous metal manufacturing.

Global Coverage: We provide consistently high-quality products to customers in Australia, South Korea, Germany, the USA, the UK, Malaysia, and the Middle East.

Quality Commitment: We never compromise on quality and are responsible for every product we manufacture.

Technical Support: We have professional personnel overseeing the entire process from raw materials to finished products!

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

Email: lucky@bjfreelong.com

WhatsApp: +86 13335371763

Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.