Introduction to P265GH
P265GH is a high temperature performance of the European standard container board, belongs to the boiler container board, the implementation standard :EN10028-2, number: 1.0425, with good plasticity, toughness, cold bending performance and welding performance, domestic Wugang can be produced. P265GH belongs to the steel plate for medium pressure boiler. It is a kind of steel plate used in European pressure vessels. P265GH corresponds to the domestic brand 25MnG. P265GH is generally used in nuclear power plants, such as P265GH in Ningde nuclear power Plant because of its high technical requirements. This technical agreement is applicable to 8-120mm thick European standard P265GH steel plate used for containment equipment of nuclear Island civil engineering of Hongyanhe Nuclear Power Plant Phase I.
P265GH implementation standard is EN10028 European standard.
Third, smelting process: The use of electric furnace outside refining vacuum degassing smelting, fine grain calm steel
Four, P265GH (Wugang production of European label number) chemical composition
CSiMnPSAlNCrCuMoNbNiTiV 0.2 or less 0.40.8 or less - 1.4 0.025 0.01 0.02 0.012 or less or more or less or less acuities were 0.3, 0.3, 0.08, 0.02, 0.3 or less or less or less or less acuities were 0.03, 0.02 or less
V. Delivery status of P265GH
P265GH steel plate delivery status: Normalizing (N). The grain size of the steel plate in the normal delivery state is more uniform and the performance is stable!
The center line of the impact sample is perpendicular to the final rolling direction and the notched axis is perpendicular to the rolling surface. Sampling requirements shall be carried out in accordance with NF EN 10028 and the following for steel plates with a thickness of 30mm or less close to the rolling surface
If the axis of the sample 30mmt≤50mm is located at half of the thickness of the steel plate;
If the axis of the sample 50mmt≤80mm is located at one-third of the thickness of the steel plate;
If the axis of the t80mm sample is located at a quarter of the thickness of the steel plate.
En 10028-22003 Steel plates for pressure purposes - Part 2 Non-alloy and alloy steels having high temperature properties;
En10029-1991 Tolerances for shape, size and weight of hot-rolled steel plates with thickness of 3mm and above;
En 10028-12000 Steel for pressure vessels - Specification for flat products - Part 1 General requirements;
EN 10160-1999 Ultrasonic test method for steel plates thicker than or equal to 6mm (reflection method);
The minimum average value of the impact test of the steel plate at -20 degrees is 27 J. Only one of the three samples is allowed to have a test result lower than the average value but not less than 75% of the average value.
6. Mechanical properties of P265GH:
8.1. Each batch shall be subjected to one bending test at room temperature the thickness of specimens with the diameter of bending indenter or bending center being aa. The outer surface after bending should be free of cracks tear or blister.
8.2 Impact test of steel plate at -20℃ The minimum average value is 27 J among the three samples, only one sample is allowed to have the test result lower than the average value but not less than 75% of the average value.
Seven, P265GH use:
P265GH production P265GH delivery status P265GH Chemical composition P295GH production P295GH delivery status P2GH Main uses: has good plasticity, toughness, cold bending performance and welding performance. It is suitable for the manufacture of nuclear island steel containment, pressure vessels, equipment structural parts and so on.
