1, 9Ni590B steel plate material introduction: 9Ni590B steel plate is 9% Ni steel plate for low-temperature pressure vessels, with excellent low-temperature toughness and high strength at -196℃.
2, 9Ni590B steel plate implementation standard: GB 24510-2009, this standard applies to the thickness of not more than 50mm 9% Ni steel plate.
3,9Ni590B steel plate delivery status: quenched + tempered or twice quenched + tempered (QT, QLT).
4,9Ni590B steel surface quality:
1> The surface of the steel plate should not have cracks, bubbles, scars, folding and pressed into the iron oxide and other defects harmful to the use of steel should not be visually visible delamination.
2> The steel surface is allowed to have a thin layer of iron oxide that does not prevent the inspection of surface defects, rust, not significant surface roughness caused by pressed-in iron oxide peeling, indentation and other local defects, but its depth should not be greater than half of the thickness tolerance, and should ensure that the minimum thickness of the steel allowable.
3>Harmful defects exist on the surface of the steel, cleanup is allowed, the cleanup should be smooth without edges, and should ensure that the minimum thickness of steel allowed.
4>Steel should not be welded
5, 9Ni590B steel application: 9Ni590B steel is suitable for the manufacture of liquefied natural gas (LNG) storage tanks, liquefied natural gas (LNG) ships and other low-temperature pressure vessels with.
