Introduction and application of 20MnHR steel plate grade

Introduction and application of 20MnHR steel plate grade

20MnHR and 20HR both belong to nuclear capacitor plates, and the use temperature of 20MnHR is a steel plate for normalizing pressure vessels from room temperature to -20°C, which has excellent toughness and welding performance, and is mainly used to manufacture high-parameter pressure vessels. 20HR is suitable for carbon steel plate with thickness of 8~150mm for containment lining of nuclear power engineering projects

Chemical composition

Tabulation: Depu Steel Date: 2024-01-22

C	Si	Mn	Mo	Cr	Cu
≤0.20	0.20-0.50	1.00-1.60	≤0.15	≤0.25	≤0.28

Note:
(1): In order to improve the properties of steel, other trace alloying elements other than those in the above table can be added; This value is only for WSD690D≤80mm; The data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of
GB/T222 20HR steel plate thickness deviation (N, A, B, C class deviation) Class N deviation: positive deviation and negative deviation are equal Class A deviation: negative deviation determined by nominal thickness Class B deviation: fixed negative deviation is 0.3 Class C deviation: fixed negative deviation is 0, positive deviation is determined by nominal thickness