July 10,2025

NB 00141 Steel bars, Creep resistant, St12T, X22CrMoV12-1, Rp0.2 700 MPa min high alloy steel bars.

Material properties requirements

Chemical composition

Limiting composition in mass % shall be as defined in Table 1. Table 1: Limiting chemical composition

Mechanical properties

Mechanical property requirements at 23°C ± 5°C shall be as defined in Table 2. Table 2: Limiting mechanical properties

Process requirements

Specific process requirements

Performance Heat treatment Table 3: Heat treatment cycle