- Descripción
347 stainless steel plate is an austenitic chromium-nickel stainless steel stabilized with niobium (columbio). It is designed to provide excellent resistance to intergranular corrosion, especially in high-temperature environments and after welding. comparado con 304 y 321 aceros inoxidables, 347 offers superior stability in long-term elevated temperature service.
Composición química de 347 Placa de acero inoxidable
La característica clave de 347 stainless steel is niobium (Nótese bien) stabilization, which prevents chromium carbide precipitation.
| Elemento | Contenido (%) |
|---|---|
| Cromo (cr) | 17.0–19,0 |
| Níquel (En) | 9.0–13.0 |
| Niobio (Nótese bien) | ≥ 10 ×C (typically 0.8–1.0) |
| Carbón (do) | ≤ 0.08 |
| Manganeso (Minnesota) | ≤ 2.00 |
| Silicio (Y) | ≤ 1.00 |
| Fósforo (PAG) | ≤ 0.045 |
| Azufre (S) | ≤ 0.03 |
| Hierro (fe) | Balance |
Propiedades mecánicas de 347 Acero inoxidable
347 stainless steel maintains stable mechanical strength and good toughness under both room and elevated temperatures.
| Propiedad | Valor típico |
|---|---|
| Resistencia a la tracción | 515–750MPa |
| Fuerza de producción | ≥ 205 MPa |
| Alargamiento | ≥ 40% |
| Dureza | ≤ 201 media pensión |
| Densidad | 7.9 gramos/cm³ |
Principales características de rendimiento
1. Excelente resistencia a altas temperaturas
347 stainless steel performs well in continuous service at temperatures up to 870°C, making it suitable for thermal and high-heat industrial systems.
2. Strong Resistance to Intergranular Corrosion
Niobium stabilization prevents carbide precipitation during welding or heat exposure, significantly improving resistance to intergranular corrosion compared with non-stabilized grades like 304.
3. Buena soldabilidad
347 stainless steel can be welded using standard methods without requiring post-weld heat treatment in most applications. It is especially suitable for heavy welded structures.
4. Stable Mechanical Properties
It maintains good strength, ductilidad, and oxidation resistance in long-term thermal cycling conditions.
Aplicaciones comunes de 347 Placa de acero inoxidable
347 stainless steel plate is widely used in high-temperature and corrosion-resistant welded equipment.
Las aplicaciones típicas incluyen:
- Intercambiadores de calor
- Componentes de caldera
- Partes del horno
- Jet engine exhaust systems
- Equipos de procesamiento químico
- Recipientes a presión
- Juntas de dilatación
- High-temperature piping systems
- Petrochemical industry equipment
- Power generation systems
347 Acero inoxidable vs. 321 Acero inoxidable
| Propiedad | 347 Acero inoxidable | 321 Acero inoxidable |
|---|---|---|
| Stabilizer | Niobio (Nótese bien) | Titanio (De) |
| High Temperature Stability | Más alto | Bien |
| Resistencia a la corrosión intergranular | Acérrimo | Fuerte |
| Rendimiento de soldadura | Excelente | Excelente |
| Uso típico | Severe thermal environments | General high-temperature use |
