Q345HD nuclear steel plate technical parameters

Q345HD belongs to the category of nuclear power steel in carbon steel plate, where "Q" represents the yield of steel plate, "345" represents its yield degree, which is the smaller yield strength value in production regulations, and "HD" is composed of the earlier capital letters at the beginning of the word "nuclear power". Q345HD has two grades: Q345HD1 and Q345HD2.

Q345HD steel plate smelting composition analysis:
C: ≤0.24, Si: 0.15-0.4, Mn: 1.15-1.5, P: ≤0.015, S: ≤0.012, Ni: 0.4-0.7, Cr: ≤0.25, Mo: 0.45-0.6, Cu: ≤0.1, Nb: ≤0.02, V: ≤0.05, Ti: ≤0.03, Alt: 0.02-0.04, B: ≤0.001, Co: ≤0.04

Q345HD nuclear steel plate mechanical properties (6-38mm):
Rp0.2(MPa)：≥345
Rm(MPa)：550-690
A(%)：≥18

Executive standard of Q345HD steel plate: GB/T 30814-2014; Other materials: Q205HD, Q230HD, Q250HD, Q275HD, Q345HD1, Q345HD2, Q420HD.

Q345HD is heat treated in the state of hot rolling, hot rolling plus tempering, normalizing, normalizing plus tempering.

Main properties of Q345HD steel plate: nuclear power steel shall have good structural stability, weldability, cold and hot workability, and nuclear fatigue strength under working temperature, and shall have good resistance to irradiation embrittlement under reactor irradiation.