Steel for Nuclear Power
Steel plates for nuclear power applications form the foundation of critical equipment in both the nuclear island and conventional island of nuclear power plants, serving in the manufacture of reactor pressure vessels, steam generators, steel containment vessels, and other core pressure-bearing components. Operating under extreme conditions of high temperature, high pressure, and intense radiation, and directly impacting nuclear safety, these steels are subject to the most stringent technical standards of any steel category.
Product Advantages
-
Ultra-High Strength and Pressure-Bearing Capacity
For example, the yield strength of SA-738 Gr.B steel plate can reach 485 MPa, while the tensile strength of SA533 Gr.B Cl.1 can reach 620-795 MPa, sufficient to withstand the immense pressure inside the reactor.
-
Excellent Low-Temperature and High-Temperature Toughness
The plates are required to maintain high impact toughness at -45°C or even -60°C, while certain critical components (such as the HPR1000 safety injection tank) also require a high-temperature tensile strength of no less than 600 MPa at 150°C, ensuring stable performance under extreme temperatures.
-
Strict Resistance to Irradiation Embrittlement
Through strict control of harmful elements such as Cu, P, and S, the degradation of steel performance under neutron irradiation is minimized, ensuring the safety of equipment throughout its entire service life.
-
Superior Weldability
Through low carbon equivalent design, it is ensured that after on-site welding of large structures, the joint performance remains comparable to that of the base metal.
-
Ultra-High Purity and Homogeneity
The control standards for inclusions (such as P and S) in steel are far higher than those for ordinary steel. For example, steel used in nuclear island equipment requires P and S contents of less than 0.01% and 0.005%, respectively.
Market Applications
-
Reactor Pressure Vessel
The most critical component of the nuclear island, typically manufactured from SA-533 Gr.B Cl.1 or 16MND5/18MND5 materials.
-
Steam Generator
The key equipment that transfers heat from the primary circuit to the secondary circuit, with the main body material commonly being 18MND5 steel plate.
-
Steel Containment Vessel
The "last line of defense" of a nuclear power plant, primarily manufactured from SA-738 Gr.B steel plate.
-
Other Critical Equipment
Includes pressurizers, safety injection tanks, reactor internals, and moisture separator reheaters in the conventional island.
Specifications
| Execution Standard | Grade | Guaranteed Properties (mm) | Guaranteed Ultrasonic Testing (mm) | Delivery Condition |
| GB/T713 | Q245R, Q345R, Q370R, Q420R, Q460R, 16MnDR, Q420DR, Q460DR, 09MnNiDR, Q490R, Q490DRL1, Q490DRL2, Q490RW, 15CrMoR, 12Cr2Mo1R and other CrMo steel series | 6～100 | 6～100 | AR, NR, N, NT, QT |
| NB/T20005.7 | Q235HR, Q265HR, Q295HR, Q355HR | 6～100 | 6～100 | N |
| ASME | SA387 Class1/Class2 series, SA515 series, SA516 series, SA517 series, SA533 Class1/Class2/Class3 series, SA537 Class1/Class2/Class3 series, SA724 series, SA737 series, SA738 series, SA841 series, etc. | 6～100 | 6～100 | AR, N, T, NT, M, QT |
| EN10028 | P275NL1, P275NL2, P355N, P355NL1, P355NL2, P420NL1, P420NL2, P460NL1, P460NL2, P355M, P355ML1, P355ML2, P420M, P420ML1, P420ML2, P460M, P460ML1, P460ML2, P355Q, P355QL1, P355QL2, P460Q, P460QL1, P460QL2, P500Q, P500QL1, P500QL2, P690Q, P690QL1, P690QL2, P265GH, P355GH | 6～100 | 6～100 | N, M, QT |
We Value Every Customer
-
Phone
-
Email
-
Jinqiao Economic Development Zone, Yi'an District, Tongling City, Anhui Province (within Donglian Town)
Address
