Q420R steel plate rolling, Q420R Wuyang steel, Q420R chemical composition, Q420R container steel pla

Q420R steel plate rolling, Q420R Wuyang steel, Q420R chemical composition, Q420R container steel pla

Q420R is a boiler vessel steel plate, Q420R is a new grade of GB713-2014 (steel plate for boilers and pressure vessels), mainly used in the manufacture of automobile tank cars, railway tank cars and other mobile pressure vessels.

Q420R Delivery Condition: Normal, -20 Shock.

Q420R Executive Standard: GB713-2014

Q420R Steel Plate Rolling: Wugang Xiangyang

Grade Expression Method: Q420R. Q - the first letter of "Qu" in Chinese pinyin. 420—yield strength value. R: The first letter of "Rong" in Chinese pinyin.

Q420R steel plate smelting method

1.Q420R steel is smelted by oxygen converter or electric furnace, and should be refined outside
the furnace
process 2.The compression ratio of continuous casting billet and steel ingot is not less than 3, and the compression ratio of electroslag remelting billet is not less than 2.

This steel grade must have high strength, high toughness, excellent welding performance, and good resistance to hydrogen sulfide stress corrosion, which is difficult to develop.

At present, only a few enterprises can produce the same level of steel, Wugang production of Q42OR steel plate has been applied to automobile tank cars and railway tank cars, so far more than 50 car tank cars have been manufactured, but also developed H2S corrosion-resistant pressure vessel steel 07Cr2AlIMoR, manufactured more than 20 sets of H2S corrosion-resistant pressure vessel equipment; 12Cr2Mo1VR steel is mainly used in Shaanxi Shenmu Coal Chemical Industry, Shenhua Coal Chemical Industry and other projects, and has produced more than 1,400 tons.

Therefore, it is included in GB713-2014. At the same time, combined with the problems of user demand, production and acceptance, the content of S and P elements in the steel is reduced, the impact energy index of each steel grade is improved, the principle of large single heavy steel plate batch is stipulated, and the compression ratio requirements of steel ingot and electroslag remelting are increased.