The outstanding properties of 2205 duplex stainless steel plate are attributed to its precisely designed chemical composition. Through a reasonable alloy ratio, this material achieves a balance between austenite and ferrite duplex structures, thereby achieving excellent comprehensive performance in terms of strength, corrosion resistance and processing properties.
According to the ASTM A240 standard, the main chemical composition range of 2205 stainless steel plate is as follows: carbon (C) ≤ 0.03%, chromium (Cr) is 22.0% - 23.0%, nickel (Ni) is 4.5% - 6.5%, molybdenum (Mo) is 3.0% - 3.5%, manganese (Mn) ≤ 2.0%, silicon (Si) ≤ 1.0%, and nitrogen (N) is 0.14% - 0.20%. Among them, the three elements of chromium, nickel, and molybdenum play a decisive role in the material's performance.
The chromium content should be controlled within the range of 22.0% - 23.0%, which is crucial for ensuring the formation of a stable passivation film and enhancing the material's antioxidant and corrosion resistance. The nickel content is 4.5% - 6.5%, mainly serving to stabilize the austenitic structure, balance the ratio of the two phases, and simultaneously improving the material's toughness and welding performance. The molybdenum content is 3.0% - 3.5%, significantly enhancing the material's resistance to pitting corrosion and crevice corrosion in chloride-containing environments. This is also the key reason why 2205 duplex steel is widely used in marine engineering and chemical industries.
Furthermore, the addition of nitrogen further enhanced the stability of the austenitic phase and increased the yield strength of the material. The strict control of chemical composition ensured the reliable performance of 2205 stainless steel plates under various harsh working conditions.
Jiangsu Cunrui Metal Products Co., Ltd. The 2205 duplex stainless steel plates supplied all come with original factory warranty certificates. Their chemical composition and mechanical properties can be traced, ensuring that the products meet the requirements of ASTM, ASME and GB and other standards.
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