ASTM A553 Type 1 covers 9% nickel alloy steel plates that are used in the fabrication of cryogenic pressure vessels. This material is capable of operating at temperatures as low as -196oC, and has high levels of strength and weldability.
ASTM A553 Type 1 9% nickel is a martensitic steel when it is quenched or tempered up to thicknesses as high as 100 mm. It is a unique martensite as it isn't brittle or hard, but it is strong and tough which makes it easily to fabricate into pressure vessels.
Our range of ASTM A553 Type 1 9% nickel steels are perfect for containing or transporting cryogenic gases, such as nitrogen, oxygen, and argon.
| Chemical Composition of ASTM A553 Type 1 | |
|---|---|
| Carbon (C) | 0.13% |
| Manganese (Mn) | 0.9% |
| Phosphorus (P) | 0.035% |
| Sulfur (S) | 0.040% |
| Silicon (Si) | 0.15-0.30% |
| Nickel (Ni) | 8.50-9.50% |
| Iron (Fe) | Base Metal |
Key Performance Advantages
Superior Low-Temperature Adaptability: As its core advantage, it can operate stably in extremely cold environments as low as -196℃ without brittle fracture, making it particularly suitable for cryogenic service conditions.
Excellent Mechanical Properties: After quenched and tempered (Q&T) treatment, it is a type of martensitic steel that overcomes the brittleness and hardness drawbacks of traditional martensitic steels, achieving a balance of high strength and toughness. Its tensile strength ranges from 690 to 820MPa, minimum yield strength reaches 585MPa, and elongation at 50mm gauge length is not less than 20%, enabling it to withstand the high-pressure requirements of pressure vessels.
Easy Processability and Weldability: It exhibits excellent weldability and processability, allowing for various machining operations such as cutting, drilling, and milling. This facilitates the fabrication of pressure vessel components in different specifications, reducing manufacturing complexity.
Corrosion Resistance and High-Temperature Stability: The high nickel content endows it with resistance to pitting and crevice corrosion. Meanwhile, it maintains high strength in high-temperature environments, making it suitable for certain complex working conditions involving alternating high and low temperatures.
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