The Skeleton of Furniture—TUBE: Why Such a Vast Price Difference?

I. Raw Materials: The Cornerstone of Price Differences
The raw materials for tubing are the most basic and crucial element in the cost structure. Different materials have vastly different performance and prices.

Low Carbon Steel (Soft Steel)

Characteristics: This is the most common material in furniture tubing, possessing good plasticity, weldability, and processing performance, with relatively low cost.

Price Impact: The lowest price, making it the first choice for budget furniture. However, it is extremely prone to rust and must rely on surface treatment layers for rust prevention.

Aluminum Alloy

Characteristics: Lightweight, high strength, naturally superior corrosion resistance compared to steel, and possesses a beautiful metallic luster. It is typically treated with anodizing to achieve a wider range of colors.

Price Impact: Raw material costs are significantly higher than steel, and processing is more difficult. Therefore, furniture using aluminum alloy fittings is usually positioned in the mid-to-high-end market, and its price is naturally higher.

Stainless Steel

Characteristics: Possesses excellent corrosion resistance and strength, is not prone to rust, and its surface is usually left natural or treated with brushed or mirror finishes, giving it a high-end feel.

Price Impact: Highest raw material cost. Commonly used in outdoor furniture, high-end indoor furniture, or kitchen and bathroom furniture where extremely high corrosion resistance is required. It is the most expensive of the three materials.

Simple Summary: From low-carbon steel → aluminum alloy → stainless steel, raw material costs and technical difficulty increase sequentially, which is reflected in the linear increase in fitting prices.

II. Galvanizing Method: Key to Rust Prevention and Cost
For the most mainstream low-carbon steel pipes, galvanizing is the most common and effective surface treatment to prevent rust. "Zinc plating" itself comes in different grades, with varying methods leading to significant differences in cost and performance.

**Electro-galvanizing (Cold Galvanizing)**

Process: In an electrolyte solution, zinc ions are deposited on the surface of the steel pipe using an electric current, forming a coating.

Appearance: The coating is thin, smooth, and uniform, appearing bluish-white or colored (with passivation treatment, it can be blue-white, colored, or black, etc.), making it quite aesthetically pleasing.

Performance: Rust prevention is generally poor. The thin coating is physically adhered to the substrate, making it easily scratched during handling or use, losing its protective function. Not suitable for humid environments.

Price Impact: Lowest cost. Simple process, low energy consumption, and low zinc consumption. Commonly used in dry indoor environments where rust prevention requirements are not high, such as the internal structure of ordinary clothes hangers and simple bookshelves.

**Hot-dip Galvanizing (Hot-coated Zinc)**

Process: Pickled steel pipes are immersed in molten zinc at approximately 450°C, causing a series of reactions on the steel pipe surface to form a zinc-iron alloy layer. Appearance: The coating is thicker, the surface is not as smooth as electroplated zinc, and zinc flowers (crystallization patterns) may be present. The color is darker, silver-gray, and the feel is slightly rough.

Performance: Extremely strong rust resistance. The coating is thick and metallurgically bonded to the base steel, resulting in strong adhesion and resistance to peeling. Even with minor scratches, zinc can continue to protect the iron from corrosion through the "sacrificial anode" effect.

Price Impact: The cost is much higher than electroplated zinc. The process is complex, energy-intensive, and consumes a large amount of zinc. It is commonly used in outdoor furniture, heavy-duty shelving, and industrial furniture where durability is a high priority.

Conclusion: You get what you pay for. How to choose?

The price of furniture hardware fittings is the most direct reflection of their intrinsic quality. When purchasing furniture, pay close attention to these seemingly insignificant "pipes." Weigh them, observe the fineness and uniformity of the surface treatment, and ask the salesperson about the materials and processes used. Understanding the industry knowledge behind these concepts will allow you to more wisely judge the true value of a piece of furniture and make the most suitable choice.