Product details table:

Physical and chemical properties:

Physical properties

Appearance:

Carbon steel pipes usually present a metallic gray color, with a smooth or slightly rough surface depending on the manufacturing process. Different surface treatments, such as galvanizing, painting, or coating, can be applied to enhance their appearance and corrosion resistance.

Density:

The density of carbon steel pipes is generally around 7.85g/cm³, which is slightly lower than that of stainless steel. This makes them relatively lightweight while still maintaining good strength.

Melting point:

The melting point of carbon steel is relatively high, typically ranging from 1425℃ to 1540℃. This allows carbon steel pipes to maintain stability in high-temperature environments, although not as high as stainless steel.

Coefficient of thermal expansion:

The coefficient of thermal expansion for carbon steel is moderate, typically around 12×10⁻⁶/℃ at room temperature. This property ensures that carbon steel pipes maintain dimensional stability even when exposed to temperature fluctuations.

Thermal conductivity:

Carbon steel has relatively good thermal conductivity compared to stainless steel, with a thermal conductivity coefficient of approximately 50-60W/(m·K). This makes it suitable for applications where heat transfer is important.

Electrical conductivity:

Carbon steel exhibits moderate electrical conductivity, which is higher than that of stainless steel but lower than copper or aluminum. Its conductivity depends on the specific composition and treatment of the steel.

Chemical properties

Corrosion resistance:

Carbon steel pipes have limited corrosion resistance compared to stainless steel. Without protective coatings or treatments, they are prone to rusting when exposed to moisture or corrosive environments. However, galvanization, painting, or epoxy coating can significantly improve their resistance to corrosion.

Oxidation resistance:

Carbon steel pipes exhibit moderate oxidation resistance at room temperature but are susceptible to oxidation at elevated temperatures. In high-temperature environments, additional protective measures, such as refractory coatings, may be required to prevent degradation.

Chemical stability:

In general, carbon steel pipes have moderate chemical stability. They are not resistant to strong acids, alkalis, or other highly corrosive media. For example, exposure to hydrochloric acid or sulfuric acid can lead to rapid corrosion. Protective linings or coatings are often used to enhance their chemical resistance.

Passivation:

Unlike stainless steel, carbon steel does not naturally form a passivation film. To improve its corrosion resistance, surface treatments such as galvanizing, painting, or applying epoxy coatings are necessary. These treatments create a protective barrier that prevents direct contact between the steel and corrosive agents.

Application:

Carbon steel pipes are widely used in various industries due to their excellent mechanical properties, cost-effectiveness, and versatility. In the oil and gas industry, they are used for transporting fluids, including water, oil, and natural gas, especially in pipelines and refineries. In construction, they are commonly used for structural frameworks, scaffolding, and plumbing systems. In the power generation sector, carbon steel pipes are used in boilers, heat exchangers, and steam lines due to their ability to withstand high pressures and temperatures. Additionally, they are indispensable in industries such as shipbuilding, automotive manufacturing, and infrastructure development. Their adaptability and affordability make them a popular choice for a wide range of industrial applications.