- Descripción
303 stainless sheet is a free-machining austenitic stainless steel material designed for applications requiring excellent machinability and good corrosion resistance. It is a modified version of 304 acero inoxidable, with added sulfur to improve cutting performance. Debido a esto, 303 stainless steel sheet is commonly used for precision machining parts, componentes industriales, y fabricación mecánica.
Qué es 303 Hoja inoxidable?
303 stainless sheet is an austenitic chromium-nickel stainless steel known for its outstanding machinability. The addition of sulfur improves chip breaking during machining, making it easier to cut, perforar, mill, and turn compared with standard 304 acero inoxidable.
A pesar de 303 has slightly lower corrosion resistance than 304, it offers better processing efficiency for parts that require extensive machining.
Composición química de 303 Acero inoxidable
The chemical composition of 303 stainless sheet provides a balance between corrosion resistance and machinability.
| Elemento | Contenido (%) |
|---|---|
| Carbón (do) | ≤ 0.15 |
| Cromo (cr) | 17.0 – 19.0 |
| Níquel (En) | 8.0 – 10.0 |
| Manganeso (Minnesota) | ≤ 2.00 |
| Silicio (Y) | ≤ 1.00 |
| Fósforo (PAG) | ≤ 0.20 |
| Azufre (S) | ≥ 0.15 |
| Hierro (fe) | Balance |
The elevated sulfur content is the main feature that distinguishes 303 from other austenitic stainless steel grades.
Propiedades mecánicas de 303 Hoja inoxidable
303 stainless steel provides good mechanical strength while maintaining excellent machinability.
| Propiedad | Valor típico |
|---|---|
| Resistencia a la tracción | ≥ 520 MPa |
| Fuerza de producción | ≥ 205 MPa |
| Alargamiento | ≥ 35% |
| Dureza | ≤ 241 media pensión |
| Densidad | 7.93 gramos/cm³ |
| Rango de fusión | 1400 – 1450°C |
It remains non-magnetic in annealed condition but may become slightly magnetic after cold working.
Principales características de rendimiento
Excelente maquinabilidad
303 stainless steel is widely recognized for its superior machinability among austenitic stainless steels. It performs well in:
- Mecanizado CNC
- Torneado
- Perforación
- Milling
- Threading
- Precision cutting
Its machinability can be significantly better than 304 due to sulfur inclusion.
Buena resistencia a la corrosión
303 offers good corrosion resistance in mild atmospheric and industrial environments, though it is slightly lower than 304 because sulfur reduces pitting resistance.
Good Surface Finish
The material can achieve a smooth machined finish, making it suitable for visible precision components.
Non-Heat Treatable
Like most austenitic stainless steels, 303 cannot be hardened by heat treatment but can be strengthened by cold working.
Aplicaciones comunes de 303 Hoja inoxidable
303 stainless steel sheet is widely used for components that require machining and moderate corrosion resistance.
- Precision machined parts
- Ejes
- sujetadores
- Engranajes
- Tuercas y tornillos
- Componentes de válvulas
- Bujes
- Aerospace fittings
- Partes de instrumentos
- Conectores electricos
It is especially suitable for parts manufactured by CNC processing.
303 vs 304 Acero inoxidable
| Característica | 303 Hoja inoxidable | 304 Hoja inoxidable |
|---|---|---|
| Estructura | austenítico | austenítico |
| Contenido de azufre | Más alto | Estándar |
| maquinabilidad | Excelente | Moderado |
| Resistencia a la corrosión | Bien | Mejor |
| Soldabilidad | Más bajo | Mejor |
| Uso típico | Machined parts | fabricación general |
303 is preferred for machining-intensive parts, mientras 304 is better for welding and corrosion-critical applications.
Tamaños de hoja comunes
303 stainless sheet is commonly supplied in thin and medium gauge formats.
| Espesor | Ancho | Longitud |
|---|---|---|
| 0.5 milímetros | 1000 milímetros | 2000 milímetros |
| 1.0 milímetros | 1219 milímetros | 2438 milímetros |
| 2.0 milímetros | 1500 milímetros | 3000 milímetros |
| 3.0 milímetros | 1500 milímetros | 6000 milímetros |
Custom laser cutting and machining services are commonly used for industrial projects.
