What is black mild steel pipe?

Mild steel is carbon steel with a carbon content of less than 0.25%. It is soft due to its low strength and low hardness. It includes most ordinary carbon structural steel and some high-quality carbon structural steel, most of which are not heat-treated. It is used for engineering structural parts, and some are used for mechanical parts requiring wear resistance after carburizing and other heat treatments. Black mild steel pipe is a tubular-shaped pipe of black mild steel.

Common uses of black mild steel pipe include
1. Bridge components
2. Components for Offshore Structures
3. Power Plants
4. Mining and Earth-Moving Equipment
5. Load-Handling Equipment
6. Structural Steel Works
7. Wind Tower Components

 Welding method of black mild steel pipe
1. Electric welding
Electric welding of carbon steel pipes(such as ERW steel pipe) is suitable for some simple welding jobs that do not require high strength and sealing. Due to its simple process and low cost, electric welding is widely used on construction sites and maintenance occasions.

Welding methods for carbon steel pipes include manual arc welding, submerged arc welding and gas shielded welding. Among them, manual arc welding is the most commonly used electric welding method. It is simple to operate and has a wide range of applications. However, the gap to be welded cannot be too small, and the welded position cannot be guaranteed to be completely sealed.

2. Argon arc welding
Argon arc welding is a high-performance welding method with the advantages of strong welding penetration, good weld formation, and stable quality. Compared with electric welding, argon arc welding is more complex and requires more professional operating skills and more complex equipment. However, argon arc welding has a wider application range and is suitable for applications requiring high strength and sealing, such as petroleum, chemical and other industries. It should be noted that argon arc welding requires the use of argon gas for protection, and the price of argon gas is relatively high, resulting in a relatively high cost of argon arc welding.

 The difference between black mild steel pipe and black iron pipe
1. Differences in ingredients
Black mild steel pipe is an alloy material composed of iron (Fe) and carbon (C) elements. The carbon content generally does not exceed 0.25%. Compared with high carbon steel, low carbon steel has a lower carbon content. Iron is a basic metal and belongs to the iron series elements. The content of pure iron is very high, generally above 99%.

2. Differences in properties
Black mild steel pipe has the characteristics of good plasticity, toughness and weldability, and can maintain good strength and corrosion resistance even at high temperatures. Black iron pipe is a relatively soft metal pipe with low hardness and strength and is not corrosion-resistant.

3. Differences in uses
Black mild steel pip is widely used in manufacturing vehicles, manufacturing mechanical parts, tools, bearings and other fields. Because of its relatively good plasticity and toughness, it has excellent weldability and corrosion resistance. Black iron pipe is mainly used in building structures, bridges and other fields, and is mainly used as a building material.

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