The reasons for choosing SS400 series steel plate are as follows:

1. Mechanical properties: SS400 series steel plate has good mechanical properties, including high yield strength and tensile strength, which can meet the requirements of many structural engineering.

2. Welding performance: SS400 series steel plate has good welding performance, easy processing and connection, suitable for various welding methods, such as arc welding, gas shielded welding.

3. Wide application: SS400 series steel plate is widely used in construction, Bridges, ships, vehicles and other fields, can be used to manufacture components, load-bearing structures and parts. Its versatility and reliability make it one of the most common choices.

4. Compliance with standards: SS400 series steel plate meets the requirements of Japanese JIS G3101 standard, which is a widely accepted and used standard to ensure the quality and consistency of the product.

5. Cost-effectiveness: Compared with other materials, SS400 series steel plate prices are relatively low, and the supply is sufficient, so it has a competitive advantage in terms of economy.

Steel plate materials need to be selected according to the specific project needs and use environment, but SS400 series steel plate has become one of the common choices in many projects due to its comprehensive properties and wide application fields.