Multilayer Metal Composite Bar Material - China Suppliers & Factory for Titanium, Copper, and Steel Products
Product Performance & Specification Range
Baoji Special Steel Titanium Industry Co., Ltd. has been manufacturing metal composite material series products since 2001. After 25 years of dedicated development, we have established a complete and specialized metal composite material production line.
Stainless Steel 304, 316L
Anaerobic Copper TU1, TU2
Steel Q235
Product Display
High-Performance and Low-Cost Product
The essence of this structure lies in the firm combination of three layers through metallurgical methods (such as explosive cladding and rolling cladding), achieving a performance of "1 + 1 + 1 > 3".
Outer Layer — Titanium (Ti)
- Function: Provides excellent corrosion resistance and biocompatibility.
- Resists seawater, acidic environments, and chloride ion corrosion.
- Low density reduces overall weight.
- Aesthetically pleasing surface finish.
Middle Layer — Copper (Cu)
- Function: Superior electrical and thermal conductivity; serves as functional transition and buffer layer.
- Electrical/thermal bridge for current or heat flow.
- Alleviates thermal stress between titanium and steel.
- Enhances bonding strength and production feasibility.
Inner / Base Layer — Steel (Stainless or Carbon)
- Function: Provides main structural strength, rigidity, and toughness; significantly reduces costs.
- High mechanical strength and good processability.
- Excellent weldability and machinability.
- Cost-effective structural base material.
- "External corrosion resistance + medium-high conductivity + internal high strength": The surface is corrosion-resistant, the middle layer enables efficient electrical conduction and heat transfer, and the inner layer is strong and load-bearing.
- Excellent electrochemical compatibility: In certain applications (such as cathodic protection), the potential sequence positions of titanium and copper can be carefully designed to achieve specific functions.
- Good thermal expansion matching: Through the copper transition layer, stress caused by the difference in thermal expansion between titanium and steel is effectively reduced.
- High cost performance: While ensuring high surface performance, using inexpensive steel as the base material is far less costly than using all-titanium or thick copper materials.
Main Purposes and Application Fields
High-End Chemical & Electrochemical Industries
Special electrolytic electrodes and anode baskets used in the electrolysis of corrosive media (e.g., chlorine-containing environments). The titanium layer resists corrosion, copper ensures uniform current distribution, and steel serves as the framework. Also used as conductive structural components in highly corrosive environments.
Marine Engineering & Shipbuilding
Hybrid grounding and lightning protection systems for ships. The titanium layer resists seawater corrosion, copper provides a low-resistance grounding path, and steel offers structural support. Also applied in cathodic protection systems as auxiliary anodes or special connectors requiring both conductivity and corrosion resistance.
Power & Energy Sector (Nuclear Power)
Integrated conductive/structural components for key parts of nuclear power plants. Certain control rod drive mechanisms or measurement instrument penetration assemblies require titanium for high-temperature/pressure water resistance, copper for precise low-loss signal or current transmission, and steel for mechanical load-bearing and welding to the main structure.
Aerospace & Defense (Special Purposes)
Special parts requiring lightweight, high strength, high conductivity, and environmental corrosion resistance. Applications include special grounding, electromagnetic shielding, or conductive structural units in spacecraft or high-performance aircraft. The copper layer provides electromagnetic pulse protection capability.
Scientific Research Equipment
Vacuum chambers or beam components in particle accelerators and synchrotron radiation sources. The titanium layer facilitates ultra-high vacuum (low outgassing rate), the copper layer is used for cooling or transmitting high-frequency currents, and the steel layer provides the main structure while copper effectively dissipates internal heat.
Frequently Asked Questions
A multilayer metal composite bar is a product made by metallurgically bonding multiple different metal layers — typically titanium (outer), copper (middle), and steel (inner) — into a single unified material using methods such as explosive cladding or rolling cladding. This structure combines the unique properties of each layer, delivering superior performance compared to any single material alone.
The composite bar is available in rectangular (width 20–150 mm × thickness 6–30 mm), circular (Φ 8–50 mm), and square (10–30 mm) cross-sections. Custom dimensions can also be produced based on specific customer requirements.
Copper is chosen as the intermediate layer because it has good metallurgical compatibility with both titanium and steel. It acts as a buffer to alleviate thermal stress caused by the differing thermal expansion coefficients of titanium and steel, prevents the formation of brittle intermetallic compounds at the interface, and also provides superior electrical and thermal conductivity as a functional bridge layer.
Our multilayer metal composite bar materials are manufactured in accordance with the Chinese national standard GB/T 12769-2015. Baoji Special Steel Titanium Industry Co., Ltd. has over 25 years of experience in this field, with a fully established and specialized production line ensuring consistent quality.
These composite bars are primarily used in high-end chemical and electrochemical industries (electrolytic electrodes), marine engineering and shipbuilding (grounding and cathodic protection systems), nuclear power plants (conductive structural components), aerospace and defense (electromagnetic shielding), and scientific research equipment (vacuum chambers in particle accelerators).
Yes. We offer full customization services for the composite bar material. Customers can specify the cladding material type (e.g., titanium grade, stainless steel grade), intermediate layer material, inner layer material, cross-section shape, and dimensions. Our engineering team will work with you to develop the optimal solution for your application.