9Ni590B steel plate material introduction
1. Introduction to 9Ni590B steel plate:
1. Introduction to the material of
9Ni590B steel plate 9Ni590B steel plate is a steel plate containing 9% nickel for cryogenic pressure vessels, which has excellent low-temperature toughness and high strength at -196 °C.
2. 9Ni590B steel plate implementation standard: GB 24510-2009, this standard is applicable to 9% Ni steel plate with a thickness of no more than 50mm.
3. 9Ni590B steel plate delivery status: quenching + tempering or two quenching + tempering (QT, QLT)
| Chemical composition |
| Tabulation: Depu Steel Date: 2024-01-22 |
| C |
Si |
Mn |
P |
S |
Ni |
Cu |
Cr |
Mo |
| ≤0.10 |
0.30~0.80 |
0.35 |
≤0.010 |
≤0.005 |
8.5~10.0 |
≤0.35 |
≤0.25 |
≤0.10 |
Note:
(1): In order to improve the properties of steel, other trace alloying elements other than the above table can be added, and the data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of
GB/T222 (3): when there is no Al or other nitrogen-fixing elements in the steel, N ≤ 0.009%; Cr+Mo+Cu≤0.50%
6. Application scope of 9Ni590B:
9Ni590B steel plate smelting method 9Ni590B steel plate is smelted by oxygen converter or electric furnace, and refined outside the furnace.
7. 9Ni590B steel surface quality
1> The surface of the steel plate should not have cracks, bubbles, scars, folding and pressing into the iron oxide scale and other defects that are harmful to the use, and the steel should not have visual and visible delamination. 2> The surface of the steel is allowed to have a thin layer of iron oxide scale, rust, insignificant surface roughness, indentation and other local defects caused by the falling off of the pressed iron oxide scale, but its depth should not be greater than half of the thickness tolerance, and the allowable thickness of the steel should be guaranteed. 3>. When there are harmful defects on the surface of the steel, it is allowed to be cleaned, and the cleaning place should be smooth and free of edges and corners, and the allowable thickness of the steel should be ensured. 4> steel should not be welded to repair
8, 9Ni590B steel non-destructive testing steel plate should be carried out ultrasonic testing one by one, ultrasonic testing
methods and grades agreed by both parties to the supply and demand, when not indicated, should comply with the provisions of JB/T 4730.3 in grade I, after consultation between the supply and demand parties, and indicated in the contract, other special requirements can be put forward for the steel plate.
9. Application range of
9Ni590B steel9Ni590B steel is suitable for the manufacture of liquefied natural gas (LNG) storage tanks, liquefied natural gas (LNG) ships and other low-temperature pressure vessels.
