Processing and welding characteristics of SPA-H weathering steel plate

SPA-H is a commonly used weathering steel plate, and its processing and welding characteristics are as follows:

1. Processing characteristics:
- SPA-H weathering steel plate has high strength and hardness, but its plasticity is slightly lower than that of general structural steel.
- During processing, SPA-H weathering steel plate need to be preheated to reduce the risk of cold cracking. Generally, the preheating temperature ranges from 150-200 degrees Celsius and is adjusted according to plate thickness and process requirements.
- For the cold forming of SPA-H weathering steel plates, care should be taken to avoid the bending radius being too small to prevent problems such as cracking or surface wrinkling.
- For large-scale bending or complex shape processing, it is recommended to carry out experimental verification before processing to ensure that the desired processing effect is achieved.

2. Welding characteristics:
- SPA-H weathering steel plate can be welded by manual arc welding, submerged arc welding, gas shielded welding and other common welding methods.
- Before welding, the surface of the steel plate must be carefully cleaned to remove oil, oxides and other impurities to ensure the quality of welding.
- When welding, SPA-H weathering steel plate usually need to be preheated. The preheating temperature is generally controlled at 100-150 degrees Celsius, and the appropriate preheating parameters are selected according to the thickness of the plate and the welding method.
- After the completion of welding, slag removal and thermal shock treatment should be carried out on the weld in time to reduce the possible risk of cracking.
The welded joint of SPA-H weathering steel plate has high strength and can meet the general structural requirements.

It should be noted that the processing and welding characteristics mentioned above are for reference only, and the specific operation should be carried out according to SPA-H steel plate specifications, material specifications and process requirements. Ensure that the correct machining and welding processes are followed in the actual operation, and refer to the advice of professionals.