1. Summary
The 25Cr-20Ni series of high-alloy stainless steel has excellent high temperature oxidation resistance and is suitable for heat-resistant parts below 1000¡ãC.
2. Features
1) Excellent high temperature oxidation resistance;
2) The use temperature range is very wide (below 1000C0);
3) Non-magnetic in solid solution state;
4) High temperature strength.
3. Scope of application
Exhaust pipes, pipes, heat treatment furnaces, heat exchangers, incinerators and other steels that require heat resistance, and high-heat/high-temperature contact parts.
4. Chemical composition (JIS G 4305-2005) (wt%)
| Chemical composition | C | Si | Mn | P | S | Cr | Ni |
| Standard | £0.08 | £1.50 | £2.00 | £0.045 | £0.030 | 24.00~26.00 | 19.0~22.0 |
| General | 0.05 | 0.51 | 1.3 | 0.020 | 0.001 | 25.50 | 19.60 |
5. Performance (JIS G 4305-2005)
Distinguish | Mechanical properties | |||
Ys (Mpa) | Ts (Mpa) | El (%) | Hv | |
Standard | ≥ 205 | ≥ 520 | ≥ 40 | ≤ 200 |
General | 295 | 610 | 46 | 160 |
6. Physical properties
| Density (g/cm3) | Magnetic | Specific heat 250C(J/g.0C) | Thermal conductivity 1000C(W/m. 0C) | Thermal expansion rate 20~1000C(10-6/0C) |
| 7.98 | No | 0.50 | 14.2 | 15.9 |
7. Heat treatment
Melting point: 1400~14500C;
Solution treatment: 1030~11800C.
8. Use status
1) Annealing and solid solution state:
No. 1, 2D, 2B and various other surface treatment states
9. Use matters
It can adapt to special environments, such as severe oxidizing environment and high temperature environment;