Which Type of Rods Are Used To Weld Mild Steel Tubes?

Mild steel tube is a carbon steel pipe with a carbon content between 0.05% and 0.25%. Welding is an important means of connecting mild steel tubes, and choosing suitable welding rods is the core element to ensure welding quality. The characteristics of welding rods directly affect the strength, toughness, corrosion resistance and other properties of the weld, which in turn determines whether the welded mild steel tube can operate stably and reliably in practical applications. The following rods can be used to weld mild steel tubes:

Welding rods

E4303 welding rods

1. Characteristics

It is a titanium calcium type welding rod and is one of the most commonly used low carbon steel welding rods. This welding rod has good welding process performance, stable arc, small spatter, easy slag removal, and beautiful weld formation. It can be welded in all positions, that is, it can obtain good welding quality in flat welding, vertical welding, horizontal welding and overhead welding positions.

2. Scope of application

It is widely used for welding mild steel tubes such as Q235, and is often used for welding steel pipes in general industrial pipelines and building structures, such as water pipes, heating pipes, etc.

E5015 welding rod

1. Characteristics

It is a low-hydrogen sodium type welding rod, and the weld metal has good mechanical properties, especially in terms of toughness and crack resistance. However, this welding rod has high requirements for welding process, such as the need to use a DC reverse power supply, and must be dried strictly in accordance with the requirements before use, because the moisture in the welding rod coating will cause hydrogen pores in the weld.

2. Scope of application

It is suitable for mild steel tube structures with high welding requirements, such as pipes that withstand a certain pressure, steel pipes that require low-temperature toughness, etc. For example, outdoor pipelines in some northern regions may be affected by low-temperature environments. Using E5015 welding rods helps to ensure the performance of the weld at low temperatures.

Solid welding wire

ER50-6 welding wire

1. Characteristics

This is a commonly used solid welding wire for carbon dioxide gas shielded welding. Its chemical composition ratio is reasonable, so that the weld metal has good strength and toughness. Under the protection of carbon dioxide gas, the welding process is stable, the spatter is relatively small, and the welding wire has high deposition efficiency, which can increase the welding speed.

2. Scope of application

It is widely used in the welding of mild steel tubes, especially suitable for automated welding production lines. For example, in the automobile manufacturing industry, it is used for welding mild steel tubes in automobile exhaust systems, or for batch welding of mild steel tubes in machining workshops.

Flux-cored welding wire

E501T-1 welding wire

1. Characteristics

Flux-cored welding wire has some advantages of both electrodes and solid welding wires. The flux core of E501T-1 welding wire contains a variety of alloying elements and slag-forming agents, which can form protective slag during welding and protect the weld. It has good welding process performance, can be used for all-position welding, and produces relatively less smoke during welding.

2. Scope of application

It is suitable for welding mild steel tubes with high requirements for appearance quality, such as welding of some decorative steel pipe structures or welding of indoor pipelines with good requirements for welding environment. At the same time, it is also commonly used for welding mild steel tubes with complex on-site installation conditions.

Summary

When welding mild steel tubes, it is necessary to comprehensively consider welding process requirements, welding environment, cost and other factors, and accurately select the most suitable welding rods to ensure welding quality and ensure the safe and stable operation of mild steel tubes in various application scenarios.