In addition to the required yield strength, tensile strength and elongation of CCS AH32 ship steel plate, it also requires toughness (AKV value) at low temperatures. In addition, CCS AH32 ship steel plate must have good welding performance. Then starting from the influencing factors of these properties of CCS AH32 ship steel plate, the difference between ship plate and steel plate.
Due to the increase of carbon, the welding performance and cold brittleness of CCS AH32 ship steel plate are deteriorated, so the carbon content of ship steel plate is strictly limited to the low carbon range, and other alloying elements are added to meet the strength of CCS AH32 ship steel plate. In addition, adding a small amount of grain-refining elements, such as Al, V, Ti, Nb, etc., can improve the strength step by step. The AH32 and AH36 high-strength ship plates are microalloyed.
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