Mechanical properties:
700 ~ 800℃ air cooling
Tensile strength σ B (MPa) : ≥441
Conditional yield strength σ S (MPa) : ≥294
Elongation δ5 (%) : ≥20
750 ~ 800℃ air cooling
Tensile strength σ B (MPa) : 441 ~ 490
Conditional yield strength σ S (MPa) : 294 ~ 341
Elongation δ5 (%) : 25 ~ 30
Chemical composition:
C (%) : ≤0.10
Si (%) : ≤0.80
Manganese Mn (%) : ≤0.80
Chromium Cr (%) : 16 ~ 18
Sulfur S (%) : ≤0.030
Phosphorus P (%) : ≤0.035
Ti (%) : 5×C% ~ 0.80
Physical properties:
Density ρ : 7.70g ·cm-3;
Specific heat capacity C: 0.46 J/(kg·K);
Thermal conductivity λ : 0.25w /(m·K);
Linear expansion coefficient α : 10.0 k-1 at 20 ~ 100℃, 10.0 k-1 at 20 ~ 200℃ and 11.0 k-1 at 20 ~ 500℃
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