20MnD5 nuclear steel plate chemical and mechanical properties

20MnD5 material is nuclear power steel.

Chemical composition of 20MnD5 steel plate:
C: 0.23; Si: 0.15-0.30; Mn: 1.11-1.59; P: 0.008; S: 0.005; Mo: 0.43-0.62; Ni: 0.37-0.73; Cu: 0.20; Cr: 0.25; V: 0.03.

Performance characteristics of 20MnD5 nuclear power steel plate: it has good hardenability, high temperature performance, low temperature tempering brittleness and low ductility free transition temperature.

Mechanical properties of 20MnD5 nuclear steel plate:
Rp0.2/Mpa: 450; Rm/MPa: 620-795; A50%: 20;
Shrinkage in thickness direction: 35

Heat treatment process of 20MnD5 steel plate: normalizing.