Marking of a series | Preconditioning | Test mode |
---|
A1 | A | 1 |
R1 | R | 1 |
RO1 | RO | 1 |
A2 | A | 2 |
R2 | R | 2 |
RO2 | RO | 2 |
A3 | A | 3 |
R3 | R | 3 |
RO3 | RO | 3 |
- Mode 1—no treatment; mode 2—holding for 4 h in water vapor in Ar–5 vol% H2 mixture atmosphere at 600 °C under the pressure of 0.15 MPa (water vapor pressure 0.03 MPa); and mode 3—holding for 4 h in water vapor in Ar–5 vol% H2 mixture atmosphere at 600 °C under the pressure of 0.15 MPa (water vapor pressure 0.148 MPa). A as-received material, R one-time reduction in Ar–5 vol% H2 mixture for 4 h at 600 °C under the pressure of 0.15 MPa. RO redox treatment for 5 cycles (reduction in Ar–5 vol% H2 mixture–oxidation in air)