- Descrição
308 stainless steel plate is not a commonly standardized base stainless steel grade like 304 ou 316. In most industrial usage, “308 stainless steel” refers to a chromium-nickel austenitic alloy primarily used as a welding filler metal (308 / ER308 / 308eu) that is closely related to 304 stainless steel chemistry.
In plate form, it is generally understood as a 304-compatible austenitic stainless steel with stabilized welding and corrosion performance, widely used in welded fabrication systems.
Composição Química de 308 Placa de aço inoxidável
The composition is designed to provide strong weldability and corrosion resistance similar to 304 aço inoxidável, but with optimized welding performance.
| Elemento | Contente (%) |
|---|---|
| Cromo (Cr) | 18.0–20,0 |
| Níquel (Em) | 9.0–11,0 |
| Carbono (C) | ≤ 0.08 (or ≤ 0.03 for 308L) |
| Manganês (Mn) | ≤ 2.00 |
| Silício (E) | ≤ 1.00 |
| Fósforo (P) | ≤ 0.045 |
| Enxofre (S) | ≤ 0.03 |
| Ferro (Fé) | Equilíbrio |
Propriedades Mecânicas
308 stainless steel exhibits typical austenitic stainless steel performance with good strength and excellent ductility.
| Propriedade | Valor típico |
|---|---|
| Resistência à tracção | 520–750 MPa |
| Força de rendimento | ≥ 205 MPa |
| Alongamento | ≥ 40% |
| Dureza | ≤ 200 HB |
| Densidade | 7.9 g/cm³ |
Principais recursos de desempenho
1. Excelente soldabilidade
308 stainless steel is widely recognized for its excellent welding compatibility, especially for joining:
- 304 aço inoxidável
- Similar austenitic stainless steels
It is commonly used as a matching or over-alloyed filler material to improve weld strength and corrosion resistance.
2. Boa resistência à corrosão
It provides corrosion resistance similar to 304 aço inoxidável, suitable for:
- Ambientes atmosféricos
- Mild chemical exposure
- Food-grade processing environments
- Water systems
It performs well in general industrial conditions but is not intended for highly chloride-rich environments.
3. Stable Austenitic Structure
308 stainless steel maintains a fully austenitic structure, oferta:
- Non-magnetic behavior (condição recozida)
- Good toughness at low temperature
- Stable mechanical properties after welding
4. Boa formabilidade
The material has excellent processing performance:
- Dobrando
- Estampagem
- Rolando
- Desenho profundo
- Fabrication of welded assemblies
Aplicações comuns de 308 Placa de aço inoxidável
308 stainless steel plate is mainly used in welding-related fabrication and general industrial structures.
As aplicações típicas incluem:
- Welding fabrication structures
- Stainless steel pipe welding systems
- Pressure vessel welding components
- Equipamento de processamento de alimentos
- Chemical equipment linings
- Heat exchanger assemblies
- Tanques de armazenamento industrial
- Structural welded frames
- Automotive exhaust welding parts
- General stainless steel fabrication projects
308 Aço inoxidável vs. 304 Aço inoxidável
| Propriedade | 308 Aço inoxidável | 304 Aço inoxidável |
|---|---|---|
| Main Role | Soldagem & fabrication support | Base structural material |
| Composição | Slightly higher Ni balance | Padrão 18-8 inoxidável |
| Soldabilidade | Excelente | Bom |
| Resistência à corrosão | Semelhante | Bom |
| Uso típico | Welding filler / welded systems | Fabricação geral |
