An Overview of Shipping Container Materials and Classifications

I. Main Materials of Shipping Containers

1. Steel Plates
   Steel plates are the primary material for the container body, with common specifications such as 6mm, 8mm, 10mm, 12mm, etc. The quality of the steel plate directly affects the container’s lifespan and safety, so it is important to select high-quality, high-strength steel plates and ensure proper welding to prevent fractures.
2. Angle Steel
   Angle steel is used to reinforce the strength of the container’s corners, preventing deformation during lifting or transportation. Common specifications include 63×63×6mm, 70×70×7mm, etc. The strength and stability of the angle steel are crucial to the overall structure of the container.
3. Aluminum Alloy
   Aluminum alloy is primarily used to make doors, windows, and other accessories of the container. It is lightweight, corrosion-resistant, and easy to process. When selecting aluminum alloy, attention should be paid to its strength and corrosion resistance, along with taking appropriate anti-corrosion measures.
4. Welding Materials
   Welding materials include welding rods, welding wires, and protective gases. The selection of welding materials should be based on the type, thickness, and intended use of the steel plate to ensure welding quality.

II. Classification of Containers Based on Material

1. Steel Shipping Containers
   Steel containers are the most common type of shipping container, offering a strong structure, high strength, good water-tightness, high weldability, and low cost. However, they tend to be heavy and have poor corrosion resistance.
2. Aluminum Alloy Shipping Containers
   Aluminum alloy containers are lightweight, corrosion-resistant, easy to process, and long-lasting. However, they are more expensive to manufacture and are not suitable for welding.
3. Fiberglass Containers
   Fiberglass containers are made from a combination of glass fibers and resin, offering excellent resistance to corrosion and a lightweight structure. They are commonly used for specialized applications like transporting temperature-sensitive goods. However, their production cost is higher, and they can be less durable under heavy loads compared to steel or aluminum containers.
4. Wooden Containers
   Wooden containers, though not as commonly used as steel or aluminum containers, are often employed for shipping specific types of fragile or perishable goods. They are relatively inexpensive and can be customized easily. However, they tend to be less durable, offer lower protection against moisture, and are more prone to pests and decay.
5. Plastic Containers
   Plastic containers are lightweight, versatile, and resistant to corrosion and moisture. They are often used to transport non-heavy, non-abrasive items. These containers are more durable than wooden containers and provide better protection against weather and environmental conditions. However, they are generally less strong than steel or aluminum containers and are not suitable for heavy-duty use.
6. Stainless Steel Containers
   Stainless steel containers are highly resistant to corrosion, making them ideal for transporting goods sensitive to rust or moisture, such as chemicals or food products. These containers are durable, strong, and can withstand harsh environments. However, their cost is higher than standard steel containers, and they can be heavier, which increases transportation costs.
7. Corten Steel Containers
   Corten steel, also known as weathering steel, is a special type of steel that forms a stable, rust-like appearance when exposed to weather. This natural patina acts as a protective layer, preventing further corrosion. Corten steel containers are commonly used for outdoor storage or transportation as they provide good weather resistance without requiring additional coatings or maintenance. However, their cost is higher than regular steel, and they may not be suitable for situations requiring a clean appearance.
8. Hybrid Containers (Steel-Aluminum Combination)
   Hybrid containers combine the structural strength of steel with the lightweight and corrosion resistance of aluminum. These containers aim to optimize both durability and weight savings, making them ideal for industries that require efficient cargo transportation. They are especially useful in reducing fuel costs during transportation while maintaining strong structural integrity. However, the cost can be higher due to the use of both steel and aluminum.