16MnDR normalized, 16MnDR – 40-degree impact

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16MnDR is a type of steel plate used for low-temperature pressure vessels; it can withstand impacts at -40 degrees Celsius. The 16Mn designation indicates that the manganese (Mn) content in the steel plate is relatively high, ranging from about 1% to 1.6%. The ‘D’ denotes low temperatures, while ‘R’ refers to pressure vessels. (Generally, when the content of a certain chemical element in steel is high, it needs to be indicated in the material designation; for example, 1.6% manganese is denoted as 16Mn. For elements such as Cr and Mo, when their content is high, they are written as Cr1, Mo1, etc., such as 12Cr2Mo1R.) ) Its normal delivery condition is normalized delivery. I. Chemical composition of 16MnDR
In accordance with the latest standard for 16MnDR, GB 3531-2008 (implemented on December 1, 2009), the chemical composition of 16MnDR is as follows: Chemical composition (weight percentage) / %: C, Si, Mn, Ni, V, Nb, Al, P, S. For 16MnDR: C ≤ 0.20; Si 0.15–0.50; Mn 1.20–1.60; the rest are ≤ 0.02. Additionally, V ≥ 0.02, Nb ≤ 0.025, and Al ≤ 0.012. 16MnDR is a steel plate used for low-temperature pressure vessels. The low-temperature pressure vessel steel plates produced by Wuhan Iron and Steel Group possess excellent toughness and weldability, and they are widely used in various storage containers and pipelines for liquid hydrocarbons, natural gas liquefaction facilities, large-scale liquefied natural gas and petroleum gas processing equipment and storage facilities, tankers for transporting liquefied natural gas, hydrogenation reactors, and other applications. 16MnDR has obtained **exemption from inspection certification**. II. Mechanical properties of 16MnDR Grade Thickness/mm Tensile strength Rm/Mpa (N/mm2) Yield strength rel/Mp (N/mm2) Elongation A/% Impact test temperature/℃ Impact energy kv2/J 180° bending test Bending diameter Not less than Not less than Not less than 16MnDR 6–16 490–620 315–210 –40 34 d=2a >16–36 470–600 295–210 –40 34 d=3a >36–60 460–590 285–210 –40 34 d=3a >60–100 450–580 275–210 –40 34 d=3a >100–120 440–570 265–210 –40 34 d=3a