What Is SS400 Mild Steel Tube?

Mild steel tube is a carbon steel pipe with a carbon content of less than 0.25%, which has good plasticity and toughness and is easy to process and weld. SS400 is a steel grade specified in the Japanese JIS standard. "SS" stands for "Steel" and "Structure", respectively, and "400" indicates that its lower limit of tensile strength is 400MP.

SS400 mild steel tube is a mild steel tube produced in accordance with the Japanese industrial standard JIS G3101, and its material is equivalent to China's Q235B steel. The main chemical components of SS400 mild steel tube include carbon (C), silicon (Si), manganese (Mn), sulfur (S) and phosphorus (P) and other elements, of which the carbon content is about 0.05-0.20%, the manganese content is about 1.40-1.75%, and the content of impurity elements such as sulfur and phosphorus is controlled at a low level.

‌Features of SS400 mild steel tube‌

‌1. Good weldability and processability

SS400 mild steel tube has good weldability and processability, and can be connected and assembled by common welding methods such as arc welding, gas shielded welding, etc. Its high plasticity and toughness make it less prone to cracks and deformation during processing, and it is suitable for processing requirements of various complex shapes and sizes.

‌2. High strength and toughness‌

SS400 mild steel tube has a tensile strength of 400MPa and a moderate yield strength, usually between 235MPa and 245MPa. Its strength and toughness enable it to withstand large loads and maintain good stability and reliability.

‌3. Corrosion resistance‌

SS400 mild steel tube has good corrosion resistance under normal use, and can be used for a long time under general environmental conditions without rusting. This allows it to maintain good performance in harsh environments such as moisture and corrosion.‌

Application fields of SS400 mild steel tubes

1. Construction field

In the construction field, SS400 mild steel tubes are often used to make steel structure frames, beams, columns, floor slabs and other components. Due to its good strength and toughness, it can meet the requirements of building structures for materials and is widely used in industrial plants, commercial buildings and residential buildings.

2. Machinery manufacturing field

In the machinery manufacturing field, SS400 mild steel tubes can be used to manufacture various mechanical parts and structural parts. Due to its moderate strength and good processing performance, it is often used to manufacture light machinery, bearing supports, bearing seats, gears, connecting rods, pins and other components.

3. Bridge engineering

In bridge engineering, SS400 mild steel tubes are suitable for manufacturing structural components such as main beams and cross beams of bridges. Its good strength and durability can meet the requirements of bridges for materials.

4. Automobile manufacturing

In the automobile manufacturing industry, SS400 mild steel tubes are used to manufacture automobile chassis, frames, body parts, etc. Its strength and safety can meet the requirements of automobile structures.

5. Shipbuilding

In shipbuilding, SS400 mild steel tube can be used for the production of hull structures and certain mechanical parts. Its good strength and durability make it widely used in shipbuilding.

6. Petrochemical

In the field of petrochemicals, SS400 mild steel tube can be used to manufacture pressure vessels, pipelines and other equipment. Its corrosion resistance and strength make it also have certain applications in chemical equipment.

Summary

In summary, SS400 mild steel tube has become the preferred material in industrial manufacturing and construction due to its good weldability, high strength and toughness, corrosion resistance and wide application fields.