Hydrogen (H) is the most harmful element in general steel such as ASTM A588 HSLA steel plate. Hydrogen dissolved in steel will cause hydrogen embrittlement, white spots and other defects. Hydrogen, like oxygen and nitrogen, has very little solubility in solid steel. It dissolves into liquid steel at high temperature, and accumulates in the structure without time to escape when cooling, forming high-pressure micro pores, which greatly reduce the plasticity, toughness and fatigue strength of steel, and even cause cracks and brittle fracture in severe cases. "Hydrogen embrittlement" mainly occurs in martensitic steel, but not very prominent in ferrite steel, and generally increases with hardness and carbon content.
A514 Gr A structural steel plates are mainly used in cranes or large heavy-load machines. ASTM A514 steel offers high strength with weldable, machinable properties.Quenched and tempered for increased strength.Available in eight grades: B, S, H, Q, E, F, A and P.Available in heavy plate thicknesses (3-inches or greater).Suitable in lower temperatures. Charpy impact test results for specific climates available.
Japan's crude steel production is expected to fall 25.9% in the April June quarter from a year earlier, the Ministry of Economy, Trade and Industry said Thursday. The Ministry of Economy and Industry quoted an industry survey report as saying that the demand for ASTM A588 HSLA steel plate and so on steel products (including export products) in April June is expected to drop 18.1% to 18.28 million tons from the same period last year. At the same time, steel exports in the current quarter will decline by 21.4% year-on-year.
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