Multilayer Metal Composite Bar Material | China Suppliers & Factory for Titanium, Zirconium & Stainless Steel Clad 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.
📋 Reference Standard: GB/T 12769-2015
Specification & Variety Range:
Clad Materials
Titanium GR1, GR2, TA1, TA2
Stainless Steel (304, 316L), etc.
Stainless Steel (304, 316L), etc.
Intermediate Layer
Copper T1, T2
Anaerobic Copper TU1, TU2, etc.
Anaerobic Copper TU1, TU2, etc.
Inner Layer Material
Stainless Steel (304, 316L)
Steel (Q235), etc.
Steel (Q235), etc.
Main Cross-Section Shape & Size Range (mm):
Rectangular
Width (20–150) × Thickness (6–30)
Circle
Φ (8–50)
Square
(10–30)
🔧 Products can be customized according to customer requirements.
Product Display
High-Performance and Low-Cost Product
Core Functions of Each Layer of Materials and the Comprehensive Performance after Composite
The essence of this structure lies in the firm combination of the three layers through metallurgical methods (such as explosive cladding and rolling cladding), achieving a performance of "1 + 1 + 1 > 3".
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Outer Layer — Titanium (Ti)
Function: Provides excellent corrosion resistance and biocompatibility.
Performance Contribution: Resists seawater, acidic environments, and chloride ion corrosion; low density reduces weight; aesthetically pleasing surface.
Performance Contribution: Resists seawater, acidic environments, and chloride ion corrosion; low density reduces weight; aesthetically pleasing surface.
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Middle Layer — Copper (Cu)
Function: Offers superior electrical and thermal conductivity, and serves as a functional transition and buffer layer.
Performance Contribution: Acts as an electrical/thermal bridge for current or heat; effectively alleviates thermal stress, enhances bonding strength, and improves production feasibility.
Performance Contribution: Acts as an electrical/thermal bridge for current or heat; effectively alleviates thermal stress, enhances bonding strength, and improves production feasibility.
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Inner / Base Layer — Steel
Function: Provides main structural strength, rigidity, and toughness, and significantly reduces costs.
Performance Contribution: High mechanical strength, good processability (welding and machining), and a cost-effective base material.
Performance Contribution: High mechanical strength, good processability (welding and machining), and a cost-effective base material.
Summary of Comprehensive Performance:
- "External corrosion resistance + medium-high conductivity + internal high strength": The surface is corrosion-resistant, the middle layer is highly efficient for electrical conduction and heat transfer, and the inner layer is strong and capable of bearing loads.
- 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 transition of the copper layer, the stress caused by the difference in thermal expansion and contraction between the titanium layer and the steel layer is reduced.
- High cost performance: While ensuring high performance on the surface, using inexpensive steel as the base material is much less costly than using all-titanium or thick copper materials.
Main Purposes and Application Fields
Ti/Cu/Steel clad material is designed to meet extreme or special multi-functional requirements, mainly applied in the following fields:
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High-End Chemical & Electrochemical Industries
Special electrolytic electrodes and anode baskets used in the electrolysis of corrosive media (such as chlorine-containing environments). The titanium layer resists corrosion, the copper layer ensures uniform current distribution, and the steel layer serves as a framework. Also used as conductive structural components in highly corrosive environments.
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Marine Engineering & Shipbuilding
Hybrid grounding and lightning protection systems for ships. The titanium layer resists seawater corrosion, the copper layer provides a low-resistance grounding path, and the steel layer offers structural support. Also used in cathodic protection systems as auxiliary anodes or special connectors requiring both conductivity and corrosion resistance.
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Power & Energy Sector (Especially Nuclear Power)
Integrated conductive/structural components for key parts of nuclear power plants, such as control rod drive mechanisms or measurement instrument penetration assemblies — requiring resistance to high-temperature and high-pressure water (titanium), precise and low-loss signal/current transmission (copper), and ability to withstand mechanical loads (steel).
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Aerospace & Defense (Special Purposes)
Special parts requiring lightweight, high strength, high conductivity, and resistance to environmental corrosion. For example, special grounding, electromagnetic shielding, or conductive structural units in spacecraft or high-performance aircraft. The copper layer provides electromagnetic pulse protection capability.
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Scientific Research Equipment
Vacuum chambers or beam components in particle accelerators and synchrotron radiation sources. The titanium layer facilitates achieving 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. The copper layer effectively dissipates internal heat.
Frequently Asked Questions
Q
What is a multilayer metal composite bar material and how is it made?
A multilayer metal composite bar material is a product formed by metallurgically bonding two or more different metals together — for example, titanium, copper, and steel — into a single unified structure. Manufacturing methods include explosive cladding and rolling cladding, which create a firm, permanent bond between layers at the atomic level, ensuring superior performance compared to simple mechanical fastening.
Q
What grades of titanium and stainless steel are available for the clad layer?
For the clad (outer) layer, we offer Titanium grades GR1, GR2, TA1, and TA2, as well as stainless steel grades 304 and 316L. The intermediate copper layer is available in T1, T2, TU1, and TU2 (anaerobic copper), while the inner base layer can be stainless steel (304, 316L) or structural steel (Q235). Custom material combinations are also available upon request.
Q
Why is copper used as the intermediate layer between titanium and steel?
Copper serves as a critical functional transition and buffer layer. Because titanium and steel have significantly different crystal structures and thermal expansion coefficients, direct bonding between them is difficult and can lead to brittle intermetallic compounds at the interface. Copper is compatible with both metals, effectively alleviating thermal stress, enhancing bonding strength, and providing excellent electrical and thermal conductivity as an added benefit.
Q
What size ranges and cross-section shapes are available?
We offer three main cross-section shapes: Rectangular (width 20–150 mm × thickness 6–30 mm), Circular (Φ 8–50 mm), and Square (10–30 mm). All products are manufactured in accordance with GB/T 12769-2015 standards. For dimensions outside these ranges or special profiles, please contact us for customized solutions.
Q
In which industries is Ti/Cu/Steel clad bar material most commonly used?
Ti/Cu/Steel composite bar materials are widely used in high-end chemical and electrochemical industries (electrolytic electrodes), marine engineering and shipbuilding (grounding and cathodic protection systems), nuclear power and energy sectors (conductive/structural components), aerospace and defense (electromagnetic shielding and grounding), and scientific research facilities such as particle accelerators and synchrotron radiation equipment.
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Can products be customized to meet specific project requirements?
Yes. Baoji Special Steel Titanium Industry Co., Ltd. offers full customization services. Products can be tailored in terms of material combination, cross-section shape, dimensions, layer thickness ratios, and surface finish to meet the specific technical and performance requirements of your project. With over 25 years of manufacturing experience, our engineering team is ready to provide professional consultation and custom solutions.