Metal materials commonly used in sheet metal processing

2024-07-18

Sheet metal processing is a precise and diverse form of metalworking that is widely used across various industries, including electronics, automotive, and medical. Selecting the right material is crucial for ensuring the quality and functionality of the end product. In the realm of sheet metal processing, the following metal materials are commonly utilized:

Hot Rolled Steel Coil (Black Iron Sheet): Characterized by a dense oxide layer on its surface, this material offers some rust resistance. However, the oxide layer can affect welding quality. Hot-rolled coils are often used for projects that do not demand high-precision machining due to their lower surface quality.

Cold Rolled Steel Plate: After a specific pickling treatment, such as SPHC, the black oxide layer on the surface of hot-rolled steel is removed, leaving a metallic gray finish and enhancing weldability. However, the lack of a protective layer makes the material more susceptible to oxidation and corrosion.

SECC Galvanized Steel Plate: By electroplating a zinc layer onto SPCC (cold rolled steel), SECC galvanized steel plate acquires good rust resistance. It can maintain its rust resistance for several years under non-extreme conditions. High-temperature welding can damage the zinc layer, affecting its rust resistance, so it is advisable to avoid welding galvanized steel plates or to apply appropriate surface treatment before welding.

Stainless Steel: Common types on the market, such as 304 and 316, offer good weldability and excellent corrosion resistance. These materials are typically welded using argon arc welding. In sheet metal operations, spot welding or non-penetration welding is often employed to minimize oxidation.

Aluminum Sheet (Soft Aluminum): Aluminum plate is frequently used in sheet metal processing due to its lightweight and ease of processing. It is soft and lightweight but also prone to bending and scratching. The toughness of aluminum plate is poor; repeated bending may lead to fractures, and argon arc welding is commonly used for welding.

When selecting materials, sheet metal manufacturing engineers must consider the application environment, product lifespan, processing technology feasibility, and cost-effectiveness. For instance, if a product is intended for outdoor use and requires good corrosion resistance, stainless steel or galvanized steel might be a better option. For cost-sensitive projects, cold-rolled steel plates can be considered, with their corrosion resistance improved through surface treatments.

By accurately understanding the characteristics and processing techniques of different materials, CTT is well-positioned to design efficient, economical, and durable sheet metal products. Sheet metal processing is not just a showcase of manufacturing technology but also a practical application of materials science. The right material selection and processing methods can significantly enhance product performance and market competitiveness.

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Author:

Ms. CTT TECHNOLOGY (UK) LIMITED

E-mail:

haiqi.liang@chuntian-ctt.com

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