Steel is the main raw material for shipbuilding and marine engineering structure construction, accounting for 20% ~ 30% of the construction cost of hull and marine engineering. The steel SA709 Grade 36 asme carbon steel plate products involved mainly include steel plates and section steel (marine bulb flat steel, H-beam, angle steel, etc.), casting and forging steel and supporting welding materials, etc. Among them, the amount of steel consumed for hull construction accounts for about 60% of the total ship mass, and sheet metal accounts for about 88%.
Peritectic reaction often occurs in the process of cooling and solidification of wear-resistant steel plate, SA709 Grade 36 asme carbon steel plate, and accompanied by this reaction, there will be greater volume change and linear shrinkage, which is mainly due to the hot cracking of continuous casting slab in the casting process. In the mold, the heat load transmitted from the billet is too much or uneven around the meniscus of molten steel, resulting in uneven heating, which is more likely to produce longitudinal cracks.
Normalizing is to heat the steel parts to 30~80℃above the critical temperature for a period of time. Then the parts are taken out of the furnace and cooled in air. Since the cooling rate of normalizing is faster than that of annealing, the strength and hardness of normalized SA709 Grade 36 asme carbon steel plate are higher than that of annealed SA709 Grade 36 asme carbon steel plate, but the elimination of internal stress is not as good as annealing. The normalizing operation of SA709 Grade 36 asme carbon steel plate is simple, the cost is low, the productivity is high, and it is widely used in actual production.
The results of adopting two-level SA709 Grade 36 asme carbon steel plate service system and implementing standardized management are mainly reflected in the formation of vigorous work style such as quick response and quick action. Our company's customer service center stipulates that employees must be accurate and quick in technical support and SA709 Grade 36 asme carbon steel plate after-sales service. Through the formation of this fast, agile, vigorous style, to provide users with satisfactory service.