ASTM A 353 9%Ni LNG Steel Plate


Standard: ASTM A353/A553, ASME SA353/553

Sizes: 10.13mm to 1219mm

Wall thickness: 65.4mm-108.20mm

Length: 5.8m to 11.8m, 6m to 12m.

Delivery condition: Double normalizing + tempering (NNT)

9%Ni steel is a type of low carbon medium alloy quenched and tempered steel with Martensite and Bainite structure. It offers good toughness and high strength at very low temperature and small thermal expansion coefficient, it’s characterized by high nickel content, high purity, high strength, high low-temperature impact toughness and good weldability. The steel can be used at the lowest temperature lower than -196℃, making it widely used in the manufacture of LNG tank and transport ships, is the best of the cryogenic environment using the toughness of materials.

WLD steel supply 9%Ni steel plate according to ASTM A353 and relevant standards, the ASTM A353 is Specification for Pressure Vessel Plates, Alloy Steel, Double-Normalized and Tempered 9% Nickel, it covers double-normalized and tempered 9 % nickel steel plates intended particularly for welded pressure vessels for cryogenic service. The steel plate has some specification worldwide such as:

ASTM A353, A553/ASME: SA-353,SA-553-1

EN 10028-4: X8Ni9+NT640/ X8Ni9+QT680

JIS G3127: SL9N520/SL9N590

GB 24510: 9Ni490/ 9Ni590A, 9Ni590B

9%Ni Steel Plate Chemical Composition

Specifications 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 ≤0.03 8.40~9.60
BS 1501 ≤0.10 0.10~0.30 0.30~0.80 ≤0.03 ≤0.025 8.75~9.75
JIS G 3127 ≤0.12 ≤0.30 ≤0.9 ≤0.025 ≤0.025 8.50~9.50
GB 24510 ≤0.1 ≤0.35 0.3-0.8 ≤0.015 ≤0.01 8.5-10

9%Ni Steel Plate Mechanical Property

Grade Thickness, mm Yield strength, ReH/MPa Tensile strength, Rm/MPa Elongation
9Ni490 t≤30 ≥490 640-830 ≥18-196
30≤t≤50 ≥480

As one of the leading suppliers and manufacturers of carbon steel plates in China, WLD steel supplies and manufactured low-temperature 9Ni steel plates and equivalent materials according to A353 and ASTM A553 in various sizes and specifications. If you are looking for this material, please contact us or get a quotation. Not only do we have all kinds of sizes, but we also have all kinds of sizes that are hard to find.