Name: X7Ni9 9% Nickel Alloy Steel Plate for Cryogenic LNG Storage Tanks (-196℃)
Brand: Gnee Steel (tianjin) Co., Ltd.
SKU: X7Ni9 Steel Plate
Price: 2,253.00 USD
Availability: InStock

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Features

Specifications

Temperature Resistance: -196℃

Thickness Range: 6mm - 50mm

Width Range: 1,500mm - 4,000mm

Nickel Content: 8.50 - 9.50%

Yield Strength: ≥ 585 MPa

Tensile Strength: 680 - 820 MPa

Basic Infomation

Place of Origin: tianjin

Brand Name: GNEE

Certification: SGS

Model Number: X7Ni9 Steel Plate

Payment & Shipping Terms

Packaging Details: Properly packed for ocean freight exportation in containers 1. Bundle 2. Water-proof Draft Paper

Delivery Time: 5-10 week day

Payment Terms: D/A,L/C,D/P,T/T,Western Union

Supply Ability: 800 Ton/Tons per Week

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X7Ni9 9% Nickel Alloy Steel Plate for Cryogenic LNG Storage Tanks (-196℃)

Product Description

X7Ni9 Nickel Alloy Steel Plate for Cryogenic Storage Tanks

Technical Specifications: Understanding X7Ni9 Standards

As the global demand for LNG continues to surge, the integrity of storage and transportation infrastructure becomes paramount. X7Ni9 steel plate, commonly known as 9% Nickel steel, stands as the industry standard for ultra-low temperature applications. Designed specifically to maintain exceptional toughness at 196 degrees Celsius, this material is the backbone of modern cryogenic engineering.

X7Ni9 also known as 9% Nickel Steel or 1.5663 according to EN 10028-4 is a specialized low-bon nickel alloy steel designed specifically for cryogenic applications, including the storage and transportation of LNG at temperatures down to -196°C. This high-strength steel is renowned for its excellent fracture toughness and ductility at ultra-low temperatures, preventing brittle failure in cryogenic pressure vessels.

Standard Compliance: EN 10028-4 (European), ASTM A553 / ASME SA553 Type I
Thickness Range: 6mm - 50mm
Width: 1,500mm - 4,000mm
Delivery Condition: Quenched and Tempered (QT). This heat treatment is critical to refining the grain structure and achieving the required cryogenic impact propertie.

Chemical Composition

Element	C (max)	Si (max)	Mn	P (max)	S (max)	Ni (Nickel)
Value	0.10	0.35	0.30 - 0.80	0.010	0.005	8.50 - 9.50

Mechanical Properties

Property	Value (Typical)	Remarks
Yield Strength (MPa)	≥ 585	High load-bearing capacity
Tensile Strength (MPa)	680 - 820	Structural integrity
Elongation (%)	≥ 18	Ductility for fabrication
Impact Energy (-196°C)	≥ 70 J	Charpy V-Notch Test (Critical)

Why X7Ni9 is the Standard for LNG Storage?

The choice of X7Ni9 over other materials like stainless steel or aluminum is driven by a unique balance of physics and economics:

Exceptional Brittle Fracture Resistance: Unlike bon steel, which becomes brittle as temperatures drop, the 9% nickel content in X7Ni9 prevents crack propagation even at the boiling point of liquid nitrogen
Low Thermal Expansion: In large LNG tanks, thermal contraction during cooling can cause massive structural stress. X7Ni9 has a low coefficient of thermal expansion, ensuring dimensional stability
High Strength-to-Weight Ratio: The high yield strength allows for thinner tank walls compared to other cryogenic materials, reducing the overall weight of LNG riers and the cost of onshore tanks
Superior Weldability: Despite its alloy content, X7Ni9 is engineered for excellent weldability using specialized nickel-based consumables, maintaining joint integrity at cryogenic temperatures

Why Choose GNEE for Your X7Ni9 Steel Supply?

As a leading global supplier of high-performance alloy steels, GNEE provides more than just raw materials; we provide project-ready solutions.

Class Society Certification: Our X7Ni9 plates are certified by major international bodies, including DNV, ABS, LR, and BV, specifically for marine and offshore cryogenic applications
Global Logistics Expertise: We understand the complexities of shipping large-format plates to LNG terminal sites in the Middle East, Southeast Asia, and beyond
Precision Processing: From laser cutting to beveling, we provide pre-processed plates that are ready for immediate welding upon arrival at the project site
Full Documentation: Every shipment is accompanied by a 3.1 or 3.2 MTC (Mill Test Certificate), detailing the -196°C impact test results and chemical heat analysis

Frequently Asked Questions

Can X7Ni9 steel be used for Liquid Hydrogen storage?

Generally, no. Liquid Hydrogen is stored at -253°C. While X7Ni9 is excellent for LNG (-162°C) and Liquid Nitrogen (-196°C), it reaches its safety limit at -196°C. For Liquid Hydrogen applications, austenitic stainless steels (like 304L) or specialized aluminum alloys are typically required to handle the even more extreme cold.

What is "Magnetic Arc Blow" and why is it a problem for 9% Ni steel?

9% nickel steel is highly susceptible to residual magnetism. During welding, this magnetism causes the electric arc to deflect , leading to weld defects, lack of fusion, or slag inclusions.

What makes X7Ni9 suitable for cryogenic environments?

X7Ni9 contains 9% nickel, which dramatically improves its low-temperature toughness and resistance to brittle fracture, even at the extreme -196°C temperatures of LNG operations.

What welding consumables are recommended for X7Ni9 plates?

X7Ni9 cannot be welded with matching 9% Ni fillers. Instead, Nickel-based alloys (such as Inconel-type consumables) or Hastelloy-type fillers are used. These fillers remain austenitic and provide excellent toughness at cryogenic temperatures, ensuring the weld joint is as strong and ductile as the base metal.

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Contact Person :	Ms. Kelly Zhang
Tel :	+8615824687445
Fax :	86-372-5055135

X7Ni9 9% Nickel Alloy Steel Plate for Cryogenic LNG Storage Tanks (-196℃)

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