Baoji Ruihenghua Titanium Metal Composite New Materials Co., Ltd. is one of the leading manufacturers and suppliers of stainless steel clad copper in China. If you're going to buy customized stainless steel clad copper made in China, welcome to get more information from our factory. For price consultation, contact us.
Product Introduction
Stainless steel-clad copper is a bimetallic composite material that combines the excellent electrical and thermal conductivity of copper with the excellent corrosion resistance and mechanical strength of stainless steel. It is prepared through explosive welding or hot-rolling diffusion metallurgical composite processes, achieving an atomically strong bond at the interface, eliminating the risk of poor bonding or delamination. Unlike pure copper or pure stainless steel, this composite structure perfectly balances conductivity, corrosion resistance, mechanical strength, and procurement cost. It solves the problems of pure copper's susceptibility to corrosion and rapid wear in acidic environments, while avoiding the high energy consumption of pure stainless steel in high-current applications. It is widely used in electrolytic refining, electroplating equipment, power busbars, chemical corrosion protection, heat exchange, and other fields, making it a cost-effective upgrade material to replace pure copper, copper-plated, and pure stainless steel components.
Product Parameter
Implement International Standards System
● Composite product standards: GB/T 12769-2015 "Titanium Steel Composite Plate" General Copper Steel Composite Derivative Specification, ASTM B898 "Active Metal Composite Plate Standard Specification".
● Substrate material standards: ASTM A240 (Stainless steel plates for pressure vessels), ASTM B152 (Copper and copper alloy plates), GB/T 5231 Chemical composition standard for machined copper.
● Inspection and acceptance standards: Ultrasonic testing GB/T 7734, interfacial shear strength GB/T 6396, material certificates can be issued according to EN 10204 3.1.
● Environmental compliance standards: Complies with EU RoHS 2.0 directive, free of lead, cadmium, and harmful heavy metal leaching.
● Applicable operating conditions: Suitable for low to medium corrosion conditions such as sulfuric acid systems, neutral salt solutions, and atmospheric corrosion; long-term operating temperature ≤200℃; not suitable for hydrofluoric acid, high-concentration chloride ion, and high-temperature conditions.
Standard Materials And Structural Parameters
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Parameter Categories |
Optional Specifications |
Illustrate |
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Coating material |
304 / 316L industrial stainless steel |
316L offers superior corrosion resistance, making it suitable for highly corrosive environments and coastal salt spray conditions. |
|
base material |
T2 High Purity Copper |
Excellent electrical and thermal conductivity, suitable for high current and heat exchange scenarios. |
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Product Form |
Composite flat plates, composite rods, composite profiles, and irregularly shaped parts |
It can be further processed into finished products such as conductive beams, suspension rods, and busbars. |
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Board size |
Total thickness 1.5–80mm / Width ≤1500mm / Length ≤6000mm |
For thick plates, explosive lamination is recommended; for thin plates, hot rolling lamination is recommended. |
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bar dimensions |
Diameter 20–200mm / Length 1000–6000mm |
Customizable square bars, flat bars, and other irregular cross-sections are available. |
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Coating thickness |
Single-sided: 0.5–5.0 mm; Standard: 1.0–2.5 mm |
Thickness ratios can be customized to balance corrosion resistance and cost. |
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Composite process |
Explosive composite/Hot-rolled diffusion composite |
For thick plates, small batches, and irregular shapes, choose explosive rolling; for thin plates, large batches, choose hot rolling. |
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Supply status |
Annealed state, pickled and passivated state, polished state |
Surface finish can be customized according to subsequent processing requirements. |
Product Features and Applications
Product Advantages
Metallurgical composite interface with stable performance and no degradation: Utilizing explosive bonding or hot-rolled diffusion bonding processes, the stainless steel and copper interface achieves atomic-level metallurgical bonding with a bonding strength ≥80MPa. This eliminates the delamination, poor connection, and contact resistance drift problems commonly found in mechanical and electroplating coatings. The interface remains stable under thermal cycling, machining, and long-term loads, maintaining its electrical and thermal conductivity without long-term degradation.
Combining the advantages of two metals, this solution offers outstanding cost-effectiveness: T2 copper forms the core, ensuring high electrical and thermal conductivity, while stainless steel forms the outer layer, providing corrosion resistance and mechanical strength. The two metals complement each other. Compared to pure copper, it significantly improves corrosion resistance and service life; compared to titanium-clad copper, it significantly reduces procurement costs, making it the optimal cost-effective solution for low to medium corrosion conductivity applications.
Flexible and customizable formulation to suit diverse scenarios: The thickness of the stainless steel coating and the proportion of the copper base can be customized as needed. The material ratio can be adjusted to meet different requirements such as conductivity priority, corrosion resistance priority, and strength priority. At the same time, it supports various forms such as flat plates, bars, profiles, and irregular parts. It provides one-stop supply from raw materials to deep-processed finished products to meet the personalized needs of different industries and equipment.
Excellent processing performance and convenient subsequent molding: The composite material has good overall plasticity and weldability, and can be subjected to various deep processing such as bending, stamping, rolling, welding, drilling, and cutting. The interface will not delaminate or crack during the processing. It can directly replace pure copper and pure stainless steel raw materials in the existing processing flow without additional equipment and process modification.
Long lifespan and low maintenance, resulting in better overall cost; The stainless steel coating effectively isolates corrosive media, and its service life under normal operating conditions is 2-3 times that of pure copper components, reducing the frequency of spare parts replacement and downtime for maintenance; at the same time, the procurement cost is much lower than that of rare metal composites such as titanium and zirconium, and the overall maintenance cost in the long term is significantly lower than that of single metal materials.
Application Areas
Hydrometallurgy and electroplating: conductive beams for electrolytic cells, permanent cathode hangers, electroplating fixtures, anode conductive rails, and conductive busbar substrates for electroplating tanks.
Power and Electrical Engineering: Conductive busbars, conductive contacts, heat dissipation connectors, conductive components for explosion-proof electrical appliances, and conductive components for new energy sources for high and low voltage switchgear.
Chemical Industry and Environmental Protection: Corrosion-resistant equipment conductive components, plate heat exchangers, reactor linings, wastewater treatment electrode substrates, and chemical pipeline composite joints.
Rail transit and marine engineering: conductive components for vehicles, conductive grounding components for offshore platforms, and conductive equipment for coastal salt spray environments.
Architecture and Decoration: High-end decorative panels, conductive grounding systems, anti-corrosion curtain wall substrates, and conductive components for public facilities.
Production line upgrade: Upgrade and replacement solutions for scenarios where the original pure copper components corrode quickly and suffer high losses, and pure stainless steel components have poor conductivity and high energy consumption.
Product Details
Interface Standards
Composite interface bonding rate ≥95%, Grade I product ≥98%, no continuous unbonded areas, bonding strength ≥80MPa.
01
Dimensional Accuracy
Plate thickness tolerance ±0.1mm, length and width tolerance ±0.5mm; bar diameter tolerance ±0.2mm, straightness ≤0.5mm/m.
02
Surface quality
The coated surface is free of scratches, cracks, and rust; the passivation film is uniform, intact, clean, and free of oil.
03
Detection standards
Ultrasonic testing shall be performed in accordance with GB/T 7734. The area of a single unbonded defect shall be ≤1 cm², and the total unbonded area shall be ≤5%.
04
Product Supporting Documents
Authoritative International Qualification Certificates
GB/T 12769 Composite Product Conformity Test Report, with EN 10204 3.1 Original Material Certificate issued for each batch.
ISO 9001 Quality Management System Certification, ISO 14001 Environmental Management System Certification.
Third-party SGS test report on interface bonding strength, conductivity, ultrasonic flaw detection, and corrosion resistance.
The RoHS environmental compliance test report meets the environmental requirements of the electronics and metallurgical industries.
thoughtful service
Packaging Standards (For Export By Sea)
The product is fully wrapped in pearl cotton and PE protective film, with protective covers added to the processed surfaces and corner protectors added to the edges and corners to prevent damage and deformation during transportation.
The entire batch is packed into fumigated solid wood export crates, with the interior filled with shock-absorbing foam for multiple fixation points to prevent movement and deformation during transportation.
The wooden crates are labeled with the product model, dimensions, quantity, gross weight, and moisture-proof/lifting markings, making them suitable for all scenarios including sea, land, and air transport.
Professional Consultation Q&A
Q1: What are the core advantages of stainless steel clad with copper compared to pure copper or pure stainless steel?
A1: The core advantage lies in achieving the optimal balance between conductivity, corrosion resistance, and cost. Pure copper has excellent electrical and thermal conductivity, but it is easily corroded and damaged in acidic and salt spray environments, resulting in a short service life and relatively low mechanical strength. Pure stainless steel has good corrosion resistance and high strength, but its electrical and thermal conductivity is extremely poor, leading to large voltage drops and high energy consumption in high-current scenarios, failing to meet conductivity requirements. Stainless steel-clad copper uses copper as the core to ensure high electrical and thermal conductivity, and stainless steel as the outer layer to ensure corrosion resistance and strength. Its conductivity is close to that of pure copper, its corrosion resistance far exceeds that of pure copper, and its procurement cost is much lower than that of precious metal composites such as titanium-clad copper, making it the most cost-effective solution for low- to medium-corrosion conductive scenarios.
Q2: How should one choose between explosive bonding and hot rolling bonding processes, and what are the differences between them?
A2: The core basis for coating selection is the water composition and the electrolytic reaction of the main conductor.
Both processes involve metallurgical integration and offer stable and reliable performance. The selection should primarily be based on product specifications, batch size, and application scenario.
● Explosive bonding: Suitable for thick plates with a total thickness of 10mm or more, small batch orders, and irregular cross-sections/parts. It has higher bonding strength and can be used for a wider range of material combinations; however, the production cycle is slightly longer and the cost-effectiveness of processing thin plates is low.
● Hot-rolled composite: Suitable for thin and medium-thick plates with a total thickness of 1.5–50mm, ideal for large-volume orders. Offers better plate flatness, higher production efficiency, and lower costs. However, due to mill limitations, ultra-thick plates and irregularly shaped parts cannot be produced. We will recommend the optimal process solution based on your specific thickness, dimensions, and purchase volume to ensure performance while controlling costs.
Q3: Can the thickness ratio of the stainless steel layer and the copper layer be customized, and can they be directly processed into finished components?
A3: Absolutely. We support full-parameter customization, flexibly adjusting the thickness ratio of the stainless steel cladding to the copper base layer according to your conductivity requirements, corrosion conditions, and load-bearing requirements, optimizing costs while meeting performance needs. Furthermore, we possess comprehensive deep-processing capabilities, directly processing composite substrates into finished components such as conductive beams, cathode hangers, conductive busbars, and transition joints, achieving one-stop supply from raw materials to finished products, reducing your communication and cost losses from multiple procurement and outsourcing.
Latest company news
The entire composite material production line has been fully upgraded, with an annual production capacity of 1,350 tons.
Baoji Ruihenghua Titanium Metal Composite New Materials Co., Ltd. is located in Baoji, Shaanxi Province, known as China's Titanium Valley. Following its asset restructuring in 2024, the company has upgraded its entire production line, encompassing explosive lamination, hot rolling lamination, vacuum heat treatment, and precision deep processing. With over 20 years of experience in non-ferrous metal processing, the company has built a complete production chain from ingot smelting, forging, rolling to vacuum heat treatment, equipped with core production equipment such as a 350KW electron beam melting furnace, a 2000T hydraulic press, and a 1500mm vacuum annealing furnace.
The company's products cover titanium-based, copper-based, stainless steel-based, zirconium-based, and multi-layer transition composite plates, composite rods, and composite profiles, as well as deep-processed finished products such as electrolytic conductive beams, cathode rods, electroplating targets, and electrochemical electrodes. The annual production capacity of the full range of composite materials reaches 1,350 tons. All products are manufactured in strict accordance with international standards such as ASTM and ASME, and a full-process quality traceability system has been established, improving production efficiency by 30%. The delivery cycle for standard batch orders can be controlled within 15 days, providing a stable supply guarantee for customers in global hydrometallurgy, electronic electroplating, environmental water treatment, chemical, and new energy industries.
Deep processing capabilities have been fully expanded, enabling integrated supply from raw materials to finished products.
Focusing on market demand in the fields of hydrometallurgy, electronic electroplating, environmental water treatment and new energy materials, the company's independently developed titanium-based cathode plate and conductive component production and processing project officially passed government filing and environmental protection acceptance in October 2025 and is now in full production.
Building upon its existing composite substrates, the company has further expanded its deep-processing capabilities for finished products such as electrolytic conductive beams, stainless steel copper-clad suspension rods, PCB electroplated cathode targets, MMO-coated titanium anodes, and corrosion-resistant conductive structural components, achieving integrated production from composite substrates to finished products. The company continues to increase its investment in the research and development of dissimilar metal composite technologies, providing targeted material matching and structural design solutions for different operating conditions such as strong acids, strong alkalis, high temperatures and pressures, and high-current corrosion, helping customers optimize project costs and improve equipment lifespan and operational stability.
Upgraded global service system, with self-operated import and export rights to achieve full-category export coverage.
The company possesses formal self-operated import and export qualifications and has established a comprehensive global supply and service system, with business covering multiple countries and regions in Europe, Southeast Asia, North America, and the Middle East. The company collaborates with internationally renowned logistics carriers, providing diversified delivery solutions including sea freight, air freight, and China-Europe freight trains, supporting the export of its full range of composite materials, conductive components, and electrochemical electrode products.
Adhering to the quality philosophy of "Quality First, Customer Supreme," the company provides original material certificates (EN 10204 3.1) for each batch of products, and all bulk orders support testing by third-party organizations such as SGS and BV. The company offers free returns and exchanges for quality issues within 7 days of delivery and long-term product warranties. A professional engineering team provides 24-hour online technical support, and the company is committed to becoming a trusted long-term supplier of metal composite materials and refractory metal components for global customers.
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