Why Choose Q235B+316L Stainless Steel Composite Plate?

Why Choose Q235B+316L Stainless Steel Composite Plate?
In the world of modern engineering and industrial construction, materials that combine strength, corrosion resistance, and cost-efficiency are in high demand. Among these, the Q235B+316L stainless steel composite plate stands out as a high-performance bimetallic solution that brings together the toughness of Q235B carbon steel with the anti-corrosive excellence of 316L stainless steel. This innovative composite material is widely applied in pressure vessels, petrochemical equipment, marine structures, and food-grade machinery.

What Is Q235B+316L Stainless Steel Composite Plate?
1. Definition and Composition
The Q235B+316L stainless steel composite plate is a bimetallic product manufactured through advanced explosion bonding or hot-rolling technology. It combines:

Q235B Carbon Steel Base Layer: Known for its excellent welding properties, ductility, and structural strength.

316L Stainless Steel Cladding Layer: Renowned for its resistance to corrosion, especially in chloride or marine environments, and excellent surface finish.

2. Manufacturing Methods
There are primarily two methods for producing Q235B+316L stainless steel composite plate:

Explosion Bonding: Uses controlled explosive energy to weld dissimilar metals at a molecular level.

Hot-Roll Cladding: Involves metallurgically bonding plates under high heat and pressure, ensuring uniform thickness and adhesion.

Both processes ensure the final composite plate has a strong metallurgical bond, maintaining the integrity of both metal layers.

Key Benefits of Q235B+316L Stainless Steel Composite Plate
1. Cost-Effective Material Solution
By combining a low-cost carbon steel substrate (Q235B) with a thin layer of premium stainless steel (316L), this composite material dramatically reduces overall material costs while still delivering high corrosion resistance on the exposed surfaces.

2. Dual Performance
You get the mechanical strength and weldability of carbon steel, along with the chemical resistance and hygienic surface of stainless steel. This dual functionality makes the Q235B+316L stainless steel composite plate perfect for harsh industrial environments.

3. Lightweight with High Strength
Compared to full stainless steel plates, composite plates are significantly lighter, making transportation, installation, and structural integration easier and more cost-effective.

4. Sustainable and Eco-Friendly
Using less stainless steel reduces the environmental impact of production while maintaining performance. Additionally, both Q235B and 316L stainless steel are recyclable materials.

Technical Specifications of Q235B+316L Composite Plate
Base Material: Q235B Carbon Steel
Cladding Material: 316L Stainless Steel
Cladding Thickness: 1mm–5mm
Total Plate Thickness    : 6mm–50mm (customizable)
Width: Up to 3000mm
Length: Up to 12000mm
Bonding Ratio: ≥ 95%
Bonding Strength: ≥ 210 MPa

Applications of Q235B+316L Stainless Steel Composite Plate
1. Pressure Vessels and Storage Tanks
316L cladding provides corrosion protection against aggressive chemicals, while Q235B offers the strength needed for pressure containment.

2. Marine and Offshore Structures
The Q235B+316L stainless steel composite plate is ideal for shipbuilding, offshore platforms, and ballast tanks, where seawater corrosion is a critical concern.

3. Petrochemical Equipment
In refineries and chemical plants, equipment such as reactors, columns, and heat exchangers benefit from this composite's ability to withstand both high pressure and corrosive media.

4. Pharmaceutical and Food Processing Machinery
316L stainless steel is FDA-approved for hygienic surfaces, while the carbon steel base keeps costs low without compromising quality.

5. Power Generation and Desalination Plants
The composite plate is used in heat exchangers, piping systems, and condensers exposed to high temperatures and saltwater.

Industry Standards and Certifications
The Q235B+316L stainless steel composite plate can be manufactured and tested according to several international and industrial standards:

ASME SA-264 / SA-240

ASTM A263 / A264

GB/T 8165-2008 (China standard for cladded steel)

ISO 9001:2015 certified production processes

SGS, BV, or TUV inspection on request

These certifications ensure quality, safety, and global acceptance of the product.

Welding, Machining, and Fabrication
1. Welding Techniques
The composite plates can be welded using conventional techniques:

Carbon Steel Side: Shielded Metal Arc Welding (SMAW), MIG, TIG

Stainless Steel Side: Use of ER316L filler materials with appropriate shielding gas

Care should be taken to avoid contamination between the two metals during welding.

2. Machinability
The Q235B side can be easily drilled, cut, or bent, while the 316L side can be polished or surface-treated depending on application needs.

3. Bending and Rolling
Due to its excellent bonding strength, the Q235B+316L stainless steel composite plate can be bent and rolled into cylindrical shapes for use in reactors, pipelines, and towers.

quently Asked Questions (FAQ)
1: What is the service temperature of Q235B+316L stainless steel composite plate?
A: It can typically withstand temperatures up to 600°C, depending on application and thickness.

2: Is the Q235B+316L composite plate food-safe?
A: Yes, the 316L cladding layer meets hygiene standards for food processing and pharmaceutical industries.

3: Can the composite plate be laser cut?
A: Yes, but it requires appropriate settings to cut through both layers uniformly without damaging the bond.

Invest in Performance with Q235B+316L Stainless Steel Composite Plate
The Q235B+316L stainless steel composite plate is a cutting-edge solution that delivers superior corrosion resistance, excellent mechanical strength, and cost efficiency. From heavy industrial environments to sanitary food equipment, this bimetallic product meets the rigorous demands of diverse global markets.

Whether you're a fabricator, project engineer, or procurement manager, choosing this advanced material can lead to better performance and lower lifecycle costs. As industries continue to seek sustainable, high-performance alternatives, the Q235B+316L stainless steel composite plate remains a future-forward choice.

Contact Us
Looking for a reliable supplier of Q235B+316L stainless steel composite plate?

Baoji City ShenAo Metal Materials Co., Ltd. is a leading manufacturer with over 15 years of experience in clad materials and metal bonding technologies. We offer:

Custom sizes and surface treatments

Fast international shipping

Full technical support and quality guarantees

Email: zh@baojiti.com.cn
Website: www.shenaocladplate.com
Telephone：18729731603

Let us help you find the perfect composite solution for your next project.