3Lamiera inossidabile da mm
UN 3mm stainless sheet sits at the boundary between cold rolled and hot rolled production. The correct choice depends on:
- Requisiti di finitura superficiale
- Tolleranza dimensionale
- Proprietà meccaniche
- Ambiente applicativo
General recommendation:
- Utilizzo cold rolled 3mm stainless sheet for precision and appearance
- Utilizzo hot rolled 3mm stainless plate for structural and heavy-duty use
- Descrizione
UN 3mm stainless sheet is a medium-thickness flat-rolled stainless steel product widely used in fabrication, costruzione, produzione di attrezzature, e applicazioni industriali.
At this thickness, stainless steel can be produced by both laminazione a freddo E laminazione a caldo, making it an important selection point in engineering and procurement.
Cold Rolled vs Hot Rolled Stainless Steel
The rolling process determines the sheet’s thickness capability, tolleranza, finitura superficiale, e proprietà meccaniche.
Lamiera di acciaio inossidabile laminata a freddo
Cold rolling is performed at room temperature after hot rolling, seguita da ricottura e finitura superficiale.
Caratteristiche:
- Superficie liscia e uniforme (2B, BA finishes)
- High dimensional accuracy and tight tolerances
- Improved strength due to work hardening
- Excellent flatness
Intervallo di spessore tipico:
- 0.3mm – 6mm
- Most commonly used below 4.5mm
Applicazioni:
- Componenti di precisione
- Pannelli decorativi
- Attrezzature ed elettrodomestici da cucina
- Medical and food-grade equipment
Hot Rolled Stainless Steel Sheet
Hot rolling is carried out at high temperatures above recrystallization, allowing larger deformation and thicker products.
Caratteristiche:
- Rough surface (No.1 finish, pickled or scaled)
- Lower dimensional accuracy compared to cold rolled
- Better ductility for forming and welding
- Suitable for heavy-duty applications
Intervallo di spessore tipico:
- 3mm – 200mm+
Applicazioni:
- Fabbricazione strutturale
- Heavy machinery
- Piattaforme industriali
- Pressure vessels and tanks
Thickness and Process Comparison Table
| Tipo di processo | Intervallo di spessore | Tolleranza | Finitura superficiale | Main Applications |
|---|---|---|---|---|
| Cold Rolled Stainless Sheet | 0.3mm – 6mm | Alta precisione (±0.10mm) | Liscio (2B, BA) | Decorativo, parti di precisione |
| Hot Rolled Stainless Sheet | 3mm – 200mm+ | Precisione inferiore (±0.20–0.30mm) | Ruvido (N.1) | Strutturale, industriale |
Why 3mm is a Critical Thickness
IL 3mm thickness is considered a transition point between cold rolled and hot rolled stainless steel.
Key Reasons:
1. Equipment and Rolling Capability
- Cold rolling requires higher pressure as thickness increases
- Efficient production typically limits cold rolled sheets to ≤6mm
- Hot rolling can easily produce thicker sections from slabs
2. Surface Requirements
- Cold rolled sheets are selected when appearance and smoothness are important
- Hot rolled sheets are used where surface finish is not critical
3. Precisione dimensionale
- Laminato a freddo: tighter tolerances for precision manufacturing
- Laminato a caldo: acceptable variation for structural use
4. Mechanical Behavior
- Cold rolled increases strength and hardness
- Hot rolled improves ductility and weldability
Standard Sizes for 3mm Stainless Sheet
Common Sheet Formats
| Spessore | Larghezza (mm) | Lunghezza (mm) | Supply Form |
|---|---|---|---|
| 3.0 mm | 1000 / 1219 / 1500 | 2000 / 2438 / 3000 | Foglio |
| 3.0 mm | 1000 – 2000 | Coil length | Bobina |
Note:
- Cold rolled 3mm is usually supplied as precision flat sheets
- Hot rolled 3mm is often supplied as plate or pickled sheet (HRAP)
- Custom sizes are widely available for fabrication
Guida alla selezione delle applicazioni
| Requisito | Tipo consigliato |
|---|---|
| Elevata qualità della superficie | Laminato a freddo |
| Lavorazione con tolleranze strette | Laminato a freddo |
| Saldature strutturali | Laminato a caldo |
| Applicazioni con carichi pesanti | Laminato a caldo |
| Ambienti igienici | Laminato a freddo |
