1(Wt%)main composition
C |
Si |
Mn |
Cr |
Al |
Fe |
|
Min |
- |
- |
- |
20 |
5.5 |
Bal. |
Max |
0.04 |
0.5 |
0.4 |
22 |
6.0 |
Bal. |
2 Main mechanical properties
Tensile Strength at Room Temperature: 650-750MPa
Elongation rate: 15-25%
hardness: HV220-260
Tensile Strength at 1000℃ Temperature 22-27MPa
High Temperature Durability at 1000 Temperature and 6MPa ≥100h
3.Main physical properties
density 7.1g/cm3
resistivity 1.45×10-6 Ω.m
Resistance Temperature Coefficient(Ct)
800℃ |
1000℃ |
1400℃ |
1.03 |
1.04 |
1.05 |
Average linear expansion coefficient()
20-800℃ |
20-1000℃ |
20-1400℃ |
14 |
15 |
16 |
melting point:Maximum Continuous Working Temperature 1400℃
4 Fast life
1300℃ |
1350℃ |
|
Average Fast Life (Hours)
|
110 |
90 |
Sagging rate after rupture
|
8 |
11 |