ASTM A203 is a standard that specifies the requirements for nickel alloy steel plates suitable for low-temperature service. This standard details five different grades of steel plates, each with good welding and toughness properties to meet various application needs in low-temperature environments. These plates must strictly adhere to the provisions of the ASTM A203 standard during the manufacturing process to ensure that their quality and performance meet the standard requirements.
First of all, its excellent low-temperature resistance allows it to maintain stable performance in extremely cold working environments, meeting the needs of various low-temperature services.
Secondly, ASTM A203 steel plate has excellent welding performance, which means that welding operations can be easily carried out during manufacturing and installation processes, and the welded joints have good strength and sealing properties.
In addition, ASTM A203 steel plates also exhibit high strength and toughness, which enables them to maintain good structural integrity and stability when subjected to pressure and impact.
Finally, the ASTM A203 standard includes five different grades of steel plates, each with unique performance characteristics that can be selected based on specific application requirements to meet the needs of different engineering projects.
It is important to note that, in specific engineering applications, appropriate steel plate grades should be selected based on actual conditions, and relevant manufacturing and installation standards should be followed to ensure that their performance is fully utilized.
The chemical composition of ASTM A203 steel plate mainly includes carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), and nickel (Ni). The specific content ranges are as follows:
Carbon (C): ≤0.23 Manganese (Mn): ≤0.88 Phosphorus (P): ≤0.025 Sulfur (S): 0.025
Silicon (Si): 0.13~0.45 Nickel (Ni): 3.18~3.82
The content of these chemical elements will affect the mechanical properties and physical properties of A203 steel plates, such as its tensile strength, yield strength, and elongation, etc.
Mainly used for manufacturing pressure vessels that operate in low-temperature environments. This type of steel plate has good low-temperature impact toughness and mechanical properties, making it particularly suitable for low-temperature environments ranging from -70 to -101°C (can be tempered down to -107°C). Specifically, it is mainly focused on industrial sectors that require high strength and good low-temperature performance, especially in the manufacturing of pressure vessels and related equipment in low-temperature environments. It is used in the manufacturing of equipment for cryogenic separation processing, air separation, and liquefied gas storage. It is also widely used in the manufacturing of low-temperature equipment such as CO2 absorption towers, H2S absorption towers, H2S concentration towers, and methanol scrubbing towers.
