What is the difference between 12Cr2Mo1R (H) and 12Cr2Mo1R steel?

12Cr2Mo1R (H steel plate: Pro hydrogen 2.25Cr-1Mo-0.25V steel plate).
12Cr2Mo1R(H) material is a hydrogen container plate, "R" represents the first capital letter of the container plate, and H is a hydrogen container. 12 is a chemical element, Cr is a chemical element chromium, Mo is a chemical element molybdenum, and R is the first capital letter of the container capacity.
 
12Cr2Mo1R (H) steel belongs to the hydrogen-resistant Cr-Mo steel. It is mainly used in petrochemical hydrogenation equipment, such as hydrogenation reactors. The main steel types of hydrogen-resistant Cr-Mo steel: 14Cr1MoR steel plate for coke towers, SA387Gr11C12 boiler steel plate for hydrogen in gasifiers, 2.25Cr-1Mo steel plate for hydrogenation reactors, and large thickness hydrogen resistance
 
12Cr2Mo1R Steel Standard: GB / T 713-2014.
12Cr2Mo1R (H) imitates post-weld heat treatment, and the process system is:
12Cr2Mo1R (H) steel plate imitates maximum post-weld heat treatment: Max. PWHT: 690 ± 10 × 26 h
12Cr2Mo1R (H) steel plate imitates the minimum post-weld heat treatment: Min. PWHT: 690 ± 10 × 6 h
 
12Cr2Mo1R (H) flaw detection inspection method: Ultrasonic inspection: The steel plates are inspected one by one according to JB4730 standard flaw detection, and the grade is qualified.
 
12Cr2Mo1R (H) delivery status: normalized (accelerated cooling allowed) + tempered delivery.
12Cr2Mo1R (H) hydrogen board exercise method: use electric furnace + LF / VD vacuum furnace refining method exercise. Different from other steel mills.
Scope of application: 12Cr2Mo1R (H) boiler steel is mainly used for domestic production of containers and tanks. It is used in many domestic pressure vessel factories. It can be used for making heads.
 

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