The S690QL spec impact toughness from BBN

A514 Gr P steel plate is high strength quenched and tempered alloy steel, which is an American standard steel plate. S690QL spec, A514 Gr P steel plate has high tensile strength and yield strength. It is commonly used in the manufacture of offshore platform, mining and various construction machinery and other structural parts. With the development of industry and the discovery of more and more offshore oil, the market demand for A514 Gr P steel plate is increasing.

The main function of boron in S690QL spec and so on steel is to increase the hardenability of steel, so as to save other rare and precious metals, such as nickel, chromium and molybdenum. For this purpose, the boron content is generally regulated in the range of 0.001% - 0.005%. It can replace 1.6% nickel, 0.3% chromium or 0.2% molybdenum. It should be noted that molybdenum can prevent or reduce temper brittleness, while boron slightly promotes temper brittleness, so molybdenum can not be completely replaced by boron.

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