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Multilayer Metal Composite Bar Material from China Suppliers - Titanium, Zirconium, and Stainless Steel Factory

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Baoji Special Steel Titanium Industry Co., Ltd. is a leading supplier of metal composite materials in China. Our extensive product line includes titanium clad copper, zirconium clad copper, stainless steel clad copper, tantalum clad copper, and titanium clad aluminum. Additionally, we specialize in three-layer metal composite materials, such as titanium clad copper clad steel and stainless steel clad copper clad steel products, all manufactured through our advanced rolling composite process. As a premier factory, we are dedicated to providing high-quality composite solutions to meet the diverse needs of our clients.

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    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

    🔩 Clad Materials

    Titanium GR1, GR2, TA1, TA2
    Stainless Steel: 304, 316L, etc.

    🔗 Intermediate Layer Materials

    Copper T1, T2
    Anaerobic Copper TU1, TU2, etc.

    🏗️ Inner Layer Materials

    Stainless Steel: 304, 316L
    Steel: Q235, etc.

    📐 Rectangular

    Width (20 ~ 150) × Thickness (6 ~ 30) mm

    ⭕ Circle

    Φ (8 ~ 50) mm

    ⬛ Square

    (10 ~ 30) mm

    Custom Orders Welcome: Products can be customized according to the customer's requirements.

    Product Display
    Multilayer metal composite bar material (2)
    Multilayer metal composite bar material (3)
    Multilayer metal composite bar material (1)
    High-Performance and Low-Cost Product

    The essence of this structure lies in the firm combination of all three layers through metallurgical methods (such as explosive cladding and rolling cladding), achieving a performance of "1 + 1 + 1 > 3".

    🔵 Layer 1 — 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.

    🟠 Layer 2 — Middle Layer: Copper (Cu)

    Function: Offers superior electrical and thermal conductivity, serving as a functional transition and buffer layer.

    Electrical/Thermal Bridge: In high electrical conductivity scenarios, it acts as the primary channel for current or heat.

    Buffer & Bonding Layer: The crystal structures and thermal expansion coefficients of titanium and steel differ greatly, making direct bonding difficult and prone to brittle intermetallic compounds at the interface. Copper has better compatibility with both, effectively alleviating thermal stress, enhancing bonding strength, and improving production feasibility.

    🟢 Layer 3 — Inner/Base Layer: Steel (Stainless Steel or Carbon Steel)

    Function: Provides the main structural strength, rigidity, and toughness, and significantly reduces costs.

    Performance Contribution: High mechanical strength, good processability (such as 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 always aimed at meeting extreme or special multi-functional requirements, mainly applied in the following fields:

    ⚗️ High-End Chemical & Electrochemical Industries
    Specific Application 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.
    Marine Engineering & Shipbuilding
    Specific Application 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.
    Power & Energy Sector (Nuclear Power)
    Specific Application 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 primary circuit water (Ti), precise low-loss signal/current transmission (Cu), and ability to bear mechanical loads (Steel).
    🚀 Aerospace & Defense
    Specific Application 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.
    🔬 Scientific Research Equipment
    Specific Application 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 (FAQ)
    Q What is a multilayer metal composite bar material, and how is it manufactured?
    A multilayer metal composite bar material is a product formed by metallurgically bonding two or more different metals — such as titanium, copper, and steel — into a single unified structure. The bonding is typically achieved through explosive cladding or rolling cladding processes, which create a permanent, high-strength interface between each layer without the use of adhesives or mechanical fasteners.
    Q What are the available cross-section shapes and size ranges for Ti/Cu/Steel composite bars?
    The composite bars are available in three main cross-section shapes: Rectangular (width 20–150 mm × thickness 6–30 mm), Circular (Φ 8–50 mm), and Square (10–30 mm). Custom dimensions outside these ranges can also be produced based on specific customer requirements.
    Q Why is copper used as the intermediate layer in Ti/Cu/Steel composite materials?
    Copper serves as a critical transition and buffer layer between titanium and steel. Because titanium and steel have significantly different crystal structures and thermal expansion coefficients, direct bonding is difficult and can produce brittle intermetallic compounds at the interface. Copper is metallurgically compatible with both metals, effectively reducing thermal stress, improving bonding strength, and also providing excellent electrical and thermal conductivity as a functional benefit.
    Q Which industries are the primary users of Ti/Cu/Steel clad composite bars?
    The primary application industries include 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 units), and scientific research facilities such as particle accelerators and synchrotron radiation sources.
    Q Can Ti/Cu/Steel composite materials be customized to meet specific project requirements?
    Yes. Baoji Special Steel Titanium Industry Co., Ltd. offers full customization services. Customers can specify the clad material grade (e.g., GR1, GR2, TA1, TA2, or stainless steel grades), intermediate layer material type, inner base layer material, cross-section shape, and dimensional specifications. The company has over 25 years of experience in producing tailored composite solutions for diverse industrial applications.
    Q What quality standards do the multilayer metal composite bar materials comply with?
    The multilayer metal composite bar materials are manufactured in accordance with the Chinese national standard GB/T 12769-2015, which governs the technical requirements, testing methods, inspection rules, and marking for metal composite rod and bar products. This ensures consistent quality, reliable bonding performance, and dimensional accuracy across all product batches.