Performance requirements of carbon hull steel

Carbon hull steel is a kind of professional carbon steel used in the construction and repair of ship hull and its auxiliary structure. The performance of carbon hull steel determines the hull structure design and construction technology. Carbon hull steel should have enough strength and good plasticity, toughness and fatigue strength.

Yield strength is the most basic technical basis for hull strength calculation and hull structure size determination. Carbon hull steel with different yield strength should be selected for different hull construction. Only when the hull steel has good plasticity can it be subjected to cold and hot processing, and the damage due to local stress can be avoided during navigation. Toughness is the ability to resist brittle failure. Due to the different stress state, loading speed and temperature after machining, the tendency of brittle state of hull steel is also different, which is prone to brittle fracture. Therefore, it is required that the hull steel has good toughness, especially low temperature toughness, so as to ensure the safety of ship's ocean voyage.

Fatigue performance is to ensure that the ship will not produce low cycle fatigue under the action of various alternating loads in service, so as to improve the life of the ship.

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