Duplex stainless steel composite plate

Duplex Stainless Steel Composite Plate: A Comprehensive Guide

Duplex stainless steel clad plate is a bimetallic or multi-layer composite material that combines the excellent corrosion resistance of duplex stainless steel with the strength and cost-effectiveness of carbon steel or other parent materials. These two dissimilar materials are joined together using advanced joining techniques such as explosive welding or hot rolling. This combination provides excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, while maintaining high mechanical strength.Technical Specifications。

Key Features of Duplex Stainless Steel Composite Plate:

Corrosion Resistance – Outstanding resistance to chloride-induced corrosion and oxidation.

Mechanical Strength – Higher yield strength than conventional austenitic stainless steels.

Cost-Effectiveness – Reduces the consumption of expensive duplex stainless steel by bonding it to cheaper base materials.

Weldability and Fabrication – Can be processed into pressure vessels, heat exchangers, storage tanks, and pipelines.

Manufacturing Process of Duplex Stainless Steel Composite Plate
1. Explosion Welding Technology

One of the most advanced methods for producing Duplex stainless steel composite plates is explosion welding. This process uses controlled explosive energy to bond the stainless steel layer with the base steel. The impact creates a strong metallurgical bond without melting the metals, preserving the integrity of the duplex stainless steel.

2. Hot Rolling Cladding

Another widely used method is hot rolling. In this process, a duplex stainless steel slab and a carbon steel slab are stacked together and then rolled at high temperatures. The extreme pressure and heat ensure a firm bond, resulting in a composite plate with excellent structural integrity.

3. Quality Control

To ensure performance, Duplex stainless steel composite plates undergo rigorous testing, including ultrasonic inspection, tensile strength tests, impact toughness analysis, and corrosion resistance evaluation. These strict quality checks guarantee that the plates meet international standards such as ASTM, ASME, GB, and EN.

4. Technical Specifications of Duplex Stainless Steel Composite Plate

When discussing Duplex stainless steel composite plates, technical data is essential. Some common duplex stainless grades used include UNS S31803 and UNS S32205, which provide exceptional strength and corrosion resistance.

Typical Technical Parameters:

Cladding Thickness: 2mm – 10mm

Base Thickness: 10mm – 150mm

Width: Up to 4000mm

Length: Customized according to project requirements

Bonding Strength: ≥ 350MPa

Corrosion Resistance: Excellent performance in chloride-rich and acidic environments

Advantages of Using Duplex Stainless Steel Composite Plate
1. Extended Service Life

By combining duplex stainless steel’s resistance to corrosion with the structural support of carbon steel, equipment can withstand harsh environments for longer periods.

2. Reduced Costs

Instead of manufacturing an entire vessel or pipeline from solid duplex stainless steel, a Duplex stainless steel composite plate uses a thin duplex layer. This dramatically reduces material costs while still achieving top performance.

3. Improved Safety

Industries such as petrochemical and offshore oil rely on materials that can resist both pressure and chemical attack. The high yield strength and toughness of duplex stainless steel ensure safer operations.

4. Environmental Sustainability

The use of composite plates helps reduce the overconsumption of scarce and expensive duplex stainless steel resources, contributing to more sustainable manufacturing.

Industry Applications of Duplex Stainless Steel Composite Plate
1. Oil and Gas Industry

In offshore platforms and subsea pipelines, corrosion resistance is critical. Duplex stainless steel composite plates are widely used in pressure vessels, storage tanks, and separators to ensure safe and reliable performance under extreme marine conditions.

2. Chemical and Petrochemical Processing

Reactors, heat exchangers, and evaporators often face exposure to aggressive chemicals. Composite plates made with duplex stainless steel protect against corrosion while maintaining cost efficiency.

3. Marine Engineering and Shipbuilding

Ship hulls, ballast water tanks, and marine heat exchangers benefit from the durability of duplex stainless steel, preventing saltwater corrosion and reducing maintenance costs.

4. Desalination Plants

In seawater desalination, where chloride stress corrosion cracking is a constant challenge, Duplex stainless steel composite plates are ideal for brine heaters, evaporators, and piping systems.

5. Power Generation and Energy Sector

From nuclear power to renewable energy facilities, duplex stainless composite plates are applied in boilers, condensers, and cooling systems, where both strength and corrosion resistance are mandatory.

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Product production process

Duplex stainless steel clad plate application case
 1: Offshore Oil Platform in the North Sea

A major oil company used Duplex stainless steel composite plates to construct separators and storage tanks for an offshore platform. The composite plates extended the lifespan of equipment by 40% compared to traditional materials, significantly lowering maintenance costs.

 2: Seawater Desalination Plant in the Middle East

A desalination plant integrated duplex stainless composite plates into its evaporator systems. The plates withstood aggressive chloride environments, ensuring uninterrupted operation and reducing replacement frequency.

3: Chemical Reactor in Asia

In a petrochemical project, duplex stainless steel clad plates were used for high-pressure reactors. They demonstrated excellent performance under both acidic and high-temperature conditions.

Why Choose Us?

Our Advantages

1. Research and Innovation Baoji City ShenAo Metal Materials Co., Ltd. has an experienced research and development team dedicated to exploring new processes and application areas for metal composites. We continuously innovate to meet the evolving needs of our customers.

2. Excellent Reputation With over 17 years of industry experience, our company has built a strong reputation for producing high-quality duplex stainless steel composite plates that are trusted by customers worldwide.

3. Striving for Excellence Our strict production processes and comprehensive quality management system ensure that every product meets the highest standards. We deliver consistently reliable and stable products, whether for small-scale or large-scale projects.

4. Customized Product Services We offer tailor-made solutions to meet the unique requirements of our customers. Whether you need specialized sizes, shapes, or additional coatings, we can provide the right product for your application.

5. Timely Delivery and After-Sales Service We pride ourselves on our customer-centric approach, ensuring that we provide fast response times, timely delivery, and excellent after-sales support.

6. OEM Services We offer OEM services for businesses that require custom branding or specific modifications to our duplex stainless steel composite plates.

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Baoji City shenAo Metal Materials Co., Ltd. was founded in 2008 and is located in the "China Titanium Valley" Shaanxi Baoji High tech Industrial Development Zone. It focuses on the research and production of non-ferrous metal composite materials, precious metal coated titanium anodes (DSA), and titanium cathode products. Based on mature bimetallic explosive welding technology and advanced active coating manufacturing process, relying on strong resources in the Chinese titanium valley industry and the processing and manufacturing capabilities for bidding for the Olympics, we accurately and timely meet customer needs and create value for customers; Leading the development of energy-saving and environmentally friendly metal composite materials products through technological innovation, and continuously improving to meet customers' demand for long-life titanium electrodes.

The company has established close partnerships with hundreds of non-ferrous metal equipment manufacturers and electrochemical application enterprises, and has been designated as a long-term high-quality supplier.

The company has established research and development, production, and marketing departments, with strict process technology quality and testing standards to ensure reliable products and fast delivery efficiency to global customers.

We provide a variety of customized services, mainly for the followingWe provide a variety of customized services, mainly for the following：

Waterjet Cutting 
Laser Cutting 
Welding 
Plasma Welding 
Polishing 
Press 
Hydraulic straightening machine
Bending 
Drill Press 

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Frequently Asked Questions (FAQs)

1. What is duplex stainless steel composite plate? Duplex stainless steel composite plates are metal plates that combine the durability and strength of carbon steel with the corrosion resistance of duplex stainless steel. This results in a material that is cost-effective and ideal for harsh environments.

2. What industries use duplex stainless steel composite plates? These plates are widely used in industries such as chemical processing, power generation, marine, oil & gas, and water treatment due to their superior corrosion resistance and strength.

3. Can duplex stainless steel composite plates be welded? Yes, duplex stainless steel composite plates can be welded using common welding techniques. However, it is important to follow proper welding procedures to ensure the integrity of the material.

4. How do I determine the size of the plate I need? The size and thickness of the plate depend on the specific application and environmental conditions. Our team can assist you in choosing the correct dimensions for your project.

5. What is the delivery time for duplex stainless steel composite plates? Delivery times vary depending on the order volume and customization required. We strive to provide fast, reliable delivery, ensuring that your project stays on schedule.

Contact Details

Baoji City ShenAo Metal Materials Co., Ltd
Address: Wenquan Village Industrial Park, High-tech Zone, Baoji City
Contact: Wang Shujuan
Phone: 18729731603
Fax: +86-917-3380538
E-MAIL: zh@baojiti.com.cn

We are committed to providing you with the highest quality duplex stainless steel composite plates and excellent customer service. Feel free to reach out with any inquiries or to place your order today.