X8Ni9 Stainless Steel: The Perfect Solution for Cryogenic Applications

Specification:

– X8Ni9 stainless steel is a grade of steel that is specifically designed for cryogenic applications. It is known for its excellent mechanical properties and chemical composition, making it the perfect solution for these demanding conditions.

Mechanical Properties:

– X8Ni9 stainless steel has high strength and toughness, even at extremely low temperatures. It exhibits a minimum tensile strength of 750 MPa (109 ksi) and a minimum yield strength of 550 MPa (80 ksi).

– The steel also has excellent impact resistance, with a minimum Charpy V-notch impact energy of 27 Joules (20 ft-lbf) at -196°C (-321°F).

– It has a low coefficient of thermal expansion, which helps to minimize dimensional changes at cryogenic temperatures.

Chemical Composition:

– X8Ni9 stainless steel has a precise chemical composition that contributes to its unique properties. It typically contains approximately 0.10% carbon, 9% nickel, 0.80% manganese, 0.015% phosphorus, 0.015% sulfur, 0.01% silicon, and 0.08% nitrogen.

– The high nickel content in X8Ni9 stainless steel provides excellent resistance to cryogenic temperatures, as nickel is known for its ability to retain mechanical properties at very low temperatures.

– The low carbon content helps to maintain the steel’s toughness even in cold environments, while the manganese contributes to strength and hardenability.

– The low levels of phosphorus and sulfur are important for ensuring good weldability, as high levels of these elements can lead to cracking and brittleness in the heat-affected zone.

In conclusion, X8Ni9 stainless steel is the perfect solution for cryogenic applications due to its excellent mechanical properties and chemical composition. Its high strength, toughness, and impact resistance make it reliable in extreme cold conditions, while its precise chemical composition ensures good weldability and dimensional stability.
X8Cr17 Steel grade
X8Ni9 Steel grade
G X6CrNi304 Steel grade
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