9% Nickel Steel Plate is mainly used for manufacturing liquefied natural gas (LNG) storage tanks and transportation ships, with a minimum operating temperature of -196 ℃. Its high strength, excellent low-temperature toughness, and good welding performance make it the most resilient material for marine steel plates used in deep cold environments.
ASTM A353 is a steel specification in the American Society of Mechanical Engineers (ASME) standard used in the manufacture of ships and pressure vessels. Specifically, the ASTM A353 specification covers the requirements for 9% nickel steel (9Ni steel).
9% Nickel Steel Plate is a type of steel with high strength, toughness, and excellent corrosion resistance. It has good toughness and crack resistance in low temperature environments. It is commonly used in the manufacturing of liquefied natural gas (LNG) storage tanks, ship steam condensers, pressure vessels, and other applications to meet high strength requirements under low temperature conditions.
The ASTM A353 standard specifies the chemical composition, mechanical properties, impact toughness, hardness, heat treatment, and other aspects of 9% nickel steel.
National standards for 9% Nickel Steel Plate
| GB 24510-2009 | EN 10028-4-2003 | JIS G3127-2005 | CCS-2007 | ASME |
| 9Ni490 | X8Ni9+NT640 | SL9N520 | 9Ni | SA-353 |
| 9Ni590A | X8Ni9+QT680 | SL9N590 | SA-553-1 | |
| 9Ni590B | X7Ni9+QT680 | |||
The chemical composition design standards for 9% Nickel Steel Plate are shown in the table:
| C | Si | Mn | P | S | Ni | |
| ASTM A553 | ≤0.13 | 0.15~0.30 | ≤0.90 | ≤0.035 | ≤0.04 | 8.50~9.50 |
| ASTM A353 | ≤0.13 | 0.15~0.45 | ≤0.98 | ≤0.040 | ≤0.035 | 8.40~9.60 |
| BS1501-509 | ≤0.10 | 0.10~0.30 | 0.30~0.80 | ≤0.030 | ≤0.025 | 8.75~9.75 |
| VDEh680 | ≤0.10 | 0.10~0.35 | 0.30~0.80 | ≤0.035 | ≤0.035 | 8.50~9.50 |
| JIS G 3127 | ≤0.12 | ≤0.30 | ≤0.0.90 | ≤0.025 | ≤0.025 | 8.50~9.50 |
The influence of alloying elements on 9% Nickel Steel Plate
C – Carbide precipitation can cause pitting corrosion, generally controlled at<0.08%;
Mn austenite phase stabilizing element, improving wear resistance and nitrogen solid capacity;
Si – contributes to high temperature oxidation resistance and acid corrosion resistance;
Ni – stabilizing element, reducing brittleness and improving mechanical properties, enhancing acid resistance.
9% Nickel Steel Plate can provide classification society registration inspection reports such as ABS, DNV, LR, NK, BV, KR, etc.
9Ni steel plate has multiple application areas in ship construction, mainly including the following aspects:
1. Hull structure: 9% Nickel Steel Plate can be used for structural components of ships, such as shell plates, decks, bulkheads, etc. Due to the high strength and good toughness of 9% nickel steel, it can provide good structural strength and seismic performance.
2. Storage tanks and cargo holds: 9% Nickel Steel Plate have excellent corrosion resistance and can resist corrosion and oxidation in marine environments. Therefore, it is often used for the internal structure of tanks and cargo holds on ships, such as liquefied natural gas (LNG) tanks, oil tanks, and chemical storage tanks.
3. Ship pipeline system: 9% Nickel Steel Plate can also be used for the construction of ship pipeline systems, such as liquid and gas transportation pipelines, heating systems, and cooling systems. Due to its corrosion resistance and good low-temperature performance, 9Ni steel can ensure the safe operation of pipeline systems in harsh marine environments and low-temperature conditions.
4. Marine equipment and components: 9% Nickel Steel Plate can also be used to manufacture various equipment and components on ships, such as support structures for marine engines, propellers, and support brackets for propulsion devices. By using 9% Nickel Steel , these devices and components can have high strength and good durability.
It should be noted that in ship construction, different application fields may have different requirements and specifications for material properties. Therefore, when selecting and using 9% Nickel Steel Plate, it is necessary to follow the requirements of relevant classification societies (such as classification society regulations) and international standards (such as ASME), and carry out reasonable design and processing to ensure the safety and reliability of the ship.
