- 01 Zr702 Foil
- 02 UNS R60702 Foil
Zr702 Foil Description
1. Zr702 Foil Introduction
Zr702 Foil is a pure zirconium ultra-thin strip designed for highly corrosive environments and applications that require long-term stability. It contains Zr+Hf≥99.2% and is produced through vacuum melting, multi-pass precision cold rolling, and strict annealing processes. This manufacturing process ensures the material maintains a stable microstructure, accurate dimensions, and reliable performance even in harsh chemical conditions.
In practical industrial use, the main advantage of Zr702 Foil is its excellent stability in extremely corrosive media. It performs especially well in hydrochloric acid, dilute sulfuric acid, organic acids, and mixed acid environments, where it maintains a very low corrosion rate and stable chemical performance over time.
In chemical, electrolysis, and high-corrosion system design, why do purchasing engineers choose Zr702?
- Titanium materials fail quickly in non-oxidizing acids.
- Stainless steel suffers from pitting and perforation in strong acidic environments.
- Nickel materials have limited stability in some acid systems and come with higher cost.
- Zr702 provides longer service life and higher safety in acidic environments.
2. Core Material Advantages
- Extremely strong corrosion resistance: Performs better than titanium and stainless steel in hydrochloric acid, dilute sulfuric acid, organic acids, and seawater environments.
- High sealing reliability: Suitable for gaskets, diaphragms, and sealing structures with long service life.
- Excellent formability: Annealed material is soft and suitable for stamping, bending, and ultra-thin processing.
- Stable microstructure: Shows minimal performance degradation under high-temperature or long-term use conditions.
- Good weldability: Supports TIG welding and spot welding for sealing and structural connections.
- Standard specification: Thickness 0.02–1.0 mm, width 15-680 mm, suitable for chemical corrosion protection and sealing structures requiring long-term reliability.
- Custom thickness: ≧0.005 mm, suitable for scientific research, high-precision electrolysis and vacuum equipment; while balancing extreme thinness and dimensional stability, it ensures excellent material consistency, and simultaneously achieves special electrochemical properties and high sensitivity, resulting in higher assembly precision and more stable and reliable use.
3. Production Process & Equipment
Our company focuses on making high-end titanium, nickel, zirconium and alloy With advanced 20-high precision rolling mills, we can roll ultra-thin, wide strips with very high precision.
Major equipment: 750 mm 20-high precision rolling mill
- Thickness tolerance: ±0.002 mm
- Multi-pass rolling delivers consistent, uniform strip shape
We have achieved mass production of ultra-thin wide-width foil and can provide stable bulk supply.
4. Surface Treatment & Quality Control
- Cleaned via ultrasonic and alkaline solution, with a stable surface dyne level of 40 for excellent formability.
- Continuous annealing with a temperature tolerance of ±2℃. Solution heat treatment improves plasticity and strength, resulting in uniform surface color.
- Production line automation rate reaches 90%. Full-process inspection ensures superior dimension, perfect surface quality and mechanical properties.
Technical Specifications
Product Basic Information
| Item | Description |
| Material grade | Zr702 |
| UNS number | R60702 |
| Material type | Industrial pure zirconium |
| Product Form | Zirconium foil/strip/coil |
Size Specification
| Item | Range |
| Thickness | 0.02-1.0 mm |
| Width | 15-680 mm |
| Length | Customized |
| Surface finish | Bright |
| Supply condition | Annealed (M)/cold worked (H) |
Chemical Composition
| Element | Content |
| Zr+Hf | ≥99.2% |
| Hf | ≤4.5% |
| Fe + Cr | ≤0.20% |
| O | ≤0.16% |
| N | ≤0.025% |
| C | ≤0.05% |
Physical Properties
| Property | Value |
| Density | 6.51 g/cm³ |
| Melting point | 1852 °C |
| Magnetism | Non-magnetic |
Mechanical Properties (Annealed)
| Condition | Tensile Strength | Elongation |
| Annealed (M) | ≤380 MPa | ≥16% |
Standards
| Region | Standard |
| USA | ASTM B551 |
| International | ASTM/EN system |
Comparison with Titanium Foil / Nickel Foil
| Item | Titanium Foil (Gr2) | Nickel 200 | Zr702 |
| Density | Low | High | Medium |
| Strength | Medium | Medium | Medium |
| Conductivity | Poor | Excellent | Medium |
| Corrosion resistance | Strong | Strong (alkaline) | Extremely strong (acid) |
| Formability | Excellent | Excellent | Excellent |
| Application focus | Structure/corrosion | Conductive/electrode | Strong corrosion/sealing/electrolysis |
0.02–1.0 mm Zr702 Foil Features
- Excellent corrosion resistance Resists hydrochloric acid, sulfuric acid, organic acids, and seawater environments, and performs much better than titanium and stainless steel.
- Excellent formability The annealed material stays soft and suits stamping, bending, and ultra-thin sealing part fabrication.
- Stable electrical performance Suitable for electrolysis electrodes and conductive structures without contaminating the medium.
- Non-magnetic property Suitable for precision instruments and electronic devices.
- Good high-temperature stability Maintains structural stability in medium to high temperature environments.
- Excellent weldability Suitable for sealing welding, spot welding, and automated processing.
Technological Advantages
During the mass production of 0.02–1.0 mm zirconium foil, the industry commonly faces several issues:
- The material oxidizes easily and requires a very strict processing environment;
- Thickness and flatness control is difficult during rolling;
- Improper annealing easily leads to uneven microstructure;
- Surface oxidation causes color variation and contamination;
- Slitting ultra-thin foil often creates edge defects.
To address these challenges, we achieve stable production through the following solutions:
- We use multi-pass cold rolling with intermediate annealing to ensure stable thickness and good ductility recovery;
- We use inert gas or vacuum annealing to reduce oxidation and improve microstructure uniformity;
- We build a high-precision thickness control system to ensure stable mass production of ultra-thin specifications;
- We apply full-process clean production control to reduce surface defects and color differences;
- We optimize slitting and tension control to improve edge quality and yield.
Applications & Solutions
- Chemical Corrosion Protection Used for gaskets, liners, and corrosion-resistant structural parts in highly corrosive environments, helping solve material failure and leakage problems under strong acid conditions.
- Electrolysis & Electroplating Industry Used for electrode foils, electrolyzer components, and conductive structures, helping solve corrosion of electrodes and instability of current performance.
- New Energy & Battery Industry Used for corrosion-resistant current collectors and sealing structures, helping solve electrolyte corrosion and long-term reliability issues.
- Vacuum Electronics & Precision Instruments Used for non-magnetic, high-stability structural parts and shielding components, helping solve magnetic interference and structural instability in precision systems.
- Aerospace & High-End Equipment Used for corrosion-resistant thin-wall structures and components in special environments, helping solve material degradation and failure under extreme service conditions.
Custom Processing Capabilities
1. Production Line Strength
Baoji Titanium Valley Ti-Ni-Zr Material Processing Co., Ltd. has invested a total of $36.2 million in high-end strip and foil production, establishing an advanced production line for titanium, nickel, zirconium and their alloy strips and foils in the world.
The production line specializes in the stable rolling of ultra-thin, wide-width strips, overcoming critical industry challenges such as springback, difficult shape control and inconsistent material properties. We achieved stable mass production of high-end titanium foil.
With an annual capacity of 3,000 tons, the production line is expected to realize an annual output value of $116 million, supporting large-volume supply demands from high-end customers in aerospace, electronics, new energy, chemical engineering and other industries..
2. The production line is equipped with advanced equipment in the world which can ensure high precision and stability for every coil of strip and foil:
A. 750 mm 20‑High Precision Rolling Mill: Enables precision rolling of ultra‑thin wide‑width strips.
B. Ultrasonic Cleaning Line: Ensures surface cleanliness and uniform microstructure.
C. Continuous Annealing Line: Improves stability of material properties.
D. High-Precision Leveling Line: Optimizes strip shape and flatness.
E. Slitting Line: High‑precision slitting suitable for ultra‑thin materials.
F. Grinding Line: Enhances surface consistency and finish.
Through precision equipment and optimized processes, the production line has successfully broken through seven core technical barriers for strip and foil products, including surface color difference control, thickness tolerance control, uniform annealing structure, high-precision slitting, and high-performance cleaning processes.
3. We provide one-stop custom processing from raw materials to finished products, ensuring stable supply of high-precision, high-performance products to our customers.
A. Materials: titanium, nickel, zirconium and their alloys
Specifications: thickness 0.02–1.0 mm, width 15–680 mm, customize according to requirement
B. Surface treatment: cleaning, sanding, annealing; available in bright, matte and other function surface
C. Dimensional & flatness control: precise control of thickness, tolerances and surface flatness
D. Slitting & cutting to length: suitable for ultra-thin wide strips with high yield and stable quality
E. Mass delivery: annual capacity of 3,000 tons to meet large-volume, high-standard custom orders