Ordinary medium and thick steel plate: Advantages: smooth surface, good quality, easy processing, relatively low price. Disadvantages: internal bubbles, impurities, bad welding, poor bearing capacity, not suitable for use as parts that need to withstand gravity. General carbon steel sedative steel plate: Advantages: good surface quality, less impurities, uniform force, good welding performance. Disadvantages: More expensive. Low alloy structure steel plate: Advantages: excellent performance, light weight. Disadvantages: More expensive. The advantages and disadvantages of various steels are as follows: ordinary medium and thick steel plate: Advantages: smooth surface, good quality, easy processing, relatively low price. Disadvantages: internal bubbles, impurities, bad welding, poor bearing capacity, not suitable for use as parts that need to withstand gravity. General carbon steel sedative steel plate: Advantages: good surface quality, less impurities, uniform force, good welding performance. Disadvantages: More expensive. Low alloy structure steel plate: Advantages: excellent performance, light weight. Disadvantages: More expensive. Welding structure with weather-resistant steel plate: Advantages: welding performance and weather resistance are very good, and it is widely used in railway, bridge and other areas that need long-term exposure to the atmosphere. Disadvantages: The production process requirements are very high, and the process is slightly poor can not produce a good weather resistant steel plate. Pattern steel plate: Advantages: good decorative performance, anti-slip effect. Disadvantages: The production process is complex, the price is expensive, and the mechanical properties are not high. Welding structure with weather-resistant steel plate: Advantages: welding performance and weather resistance are very good, and it is widely used in railway, bridge and other areas that need long-term exposure to the atmosphere. Disadvantages: The production process requirements are very high, and the process is slightly poor can not produce a good weather resistant steel plate. Pattern steel plate: Advantages: good decorative performance, anti-slip effect. Disadvantages: The production process is complex, the price is expensive, and the mechanical properties are not high.