The advantages of A514 grade S alloy steel plate, seamless steel pipe are high pressure resistance, good toughness, long pipe section and few joints. It is widely used and the rolling technology of domestic steel mills is also very mature. Compared with round steel, the weight of seamless steel pipe is lighter under the same strength. Seamless steel pipe manufacturing ring parts, can improve the utilization of materials, simplify the manufacturing process, save materials and processing time. Compared with the welded pipe, there is no weld on the outer surface of seamless steel pipe, and it has good compression resistance.
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A514 grade S alloy steel plate, Medium and heavy steel plate is a kind of steel plate with outstanding characteristics. First of all, there are many kinds of thickness of medium and heavy steel plate, which are generally relatively thick. Secondly, the thickness of medium and heavy steel plate is relatively thick, so it can be used for high strength application such as bridges. Thirdly, the corrosion resistance and wear resistance of medium and heavy steel plate are much better than ordinary steel plate.
The effect of nitrogen (N) on the properties of A514 grade S alloy steel plate and so on steel is similar to that of carbon and phosphorus. With the increase of nitrogen content, the strength of steel can be significantly improved, especially the plasticity, especially toughness, and the weldability will be decreased, and the cold brittleness will be intensified. At the same time, aging tendency, cold brittleness and hot brittleness will be increased, which will damage the weldability and cold bending property of steel. Therefore, the nitrogen content in A514 grade S alloy steel plate and so on steel should be reduced and limited as much as possible. Generally, nitrogen content should not be higher than 0.018%.