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Introduction to 12Cr2Mo1R(H) hydrogenated steel
12Cr2Mo1R(H) hydrogenated steel is -30℃ impact hydrogen Cr-Mo steel, mainly used in petrochemical hydrogenation equipment, such as hydrogenation reactors. "12" represents the number of its chemical elements, "R" represents the first capital letter of the container plate, and H is hydrogen. The main steel types of hydrogen-resistant Cr-Mo steel are: hydrogen-resistant 14Cr1MoR steel plate for coke drum, hydrogen-resistant SA387Gr11C12 steel plate for gasifier, 2.25Cr-1Mo steel plate for hydrogenation reactor, large-thickness hydrogen-resistant 12Cr2Mo1R (H) steel plate, 2.25Cr-1Mo-0.25V steel plate.
Technical standard of 12Cr2Mo1R(H) hydrogenated steel:
The size, shape, weight and allowable deviation of 12Cr2Mo1R(H) steel shall conform to the specified range of GB6654-1996 standard.
The thickness deviation of 12Cr2Mo1R(H) steel shall be carried out according to the B or C type of GB/T709.
Delivery status of 12Cr2Mo1R(H) hydrogenated steel: normalized (allowing accelerated cooling) + tempered delivery.
Mechanical properties of 12Cr2Mo1R(H) hydrogenated steel (samples are in simulated post-weld heat treatment conditions):
| Rm | Rp0.2 | A | Z | Cold bending test | -30℃ Charpy Impact Energy (J) |
| MPa | MPa | % | % | b=2a | |
| 515~690 | ≥310 | ≥18 | ≥45 | D=3a | ≥54(average) |
| Bending 180° without cracks | ≥47(the lowest value of a sample) |
12Cr2Mo1R(H) mechanical properties, simulated after welding
| Temperature | 20 | 100 | 150 | 200 | 250 | 300 | 325 | 350 | 375 | 400 | 425 | 450 | 475 | 500 | 525 |
| Rp0.2(Mpa) | ≥310 | ≥282 | ≥271 | ≥263 | ≥258 | ≥253 | ≥251 | ≥248 | ≥245 | ≥241 | ≥237 | ≥232 | ≥225 | ≥218 | ≥210 |
| Rm(Mp) | ≥515 | ≥515 | ≥503 | ≥498 | ≥496 | ≥494 | ≥491 | ≥487 | ≥482 | ≥475 | ≥466 | ≥455 | ≥439 | ≥421 | ≥396 |
12Cr2Mo1R(H) steel ultrasonic inspection: The steel plate is inspected by ultrasonic inspection according to the JB4730 standard, and the grade is qualified.
12Cr2Mo1R (H) hydrogenated steel simulated post-weld heat treatment, the process system is:
Maximum simulated post-weld heat treatment of 12Cr2Mo1R(H) steel plate: Max. PWHT: 690±10×26 h
Minimum simulated post-weld heat treatment of 12Cr2Mo1R(H) steel plate: Min. PWHT: 690±10×6 h