Finiture in lamiera di acciaio inox

Stainless steel sheet metal finishes refer to the surface condition created during manufacturing and processing. The finish directly affects:

• Aspetto
• Resistenza alla corrosione
• Cleanability
• Prestazioni di fabbricazione
• Application suitability

In industrial production, stainless steel sheet finishes are mainly divided into:

• Hot rolled surface finishes
• Cold rolled surface finishes

Hot Rolled Stainless Steel Sheet Surface Finishes

Hot rolled stainless steel is processed at high temperature, which results in a more industrial and raw surface condition.

1. N.1 Finitura (Standard Hot Rolled Surface)

This is the most common hot rolled stainless steel finish.

Caratteristiche:

• Ruvido, dull gray surface
• Covered with oxide scale
• Produced by hot rolling followed by annealing and pickling
• Riflettività inferiore

Performance features:

• Buona resistenza al calore
• Strong mechanical performance
• Suitable for heavy fabrication

Typical applications:

• Attrezzature industriali
• Serbatoi chimici
• Componenti strutturali
• Heavy machinery

2. Pickled Surface (HRAP – Hot Rolled Annealed and Pickled)

This is an improved hot rolled finish after acid cleaning.

Caratteristiche:

• Scale removed by pickling process
• Cleaner but still matte surface
• More uniform appearance than No.1

Performance features:

• Better corrosion resistance than raw hot rolled
• Improved weldability and forming performance

Typical applications:

• Recipienti a pressione
• Telai strutturali
• Industrial pipelines

Cold Rolled Stainless Steel Sheet Surface Finishes

Cold rolled stainless steel undergoes further processing at room temperature, resulting in smoother and more precise surfaces.

1. 2B Fine (Most Common Cold Rolled Finish)

Caratteristiche:

• Liscio, slightly reflective surface
• Prodotto mediante laminazione a freddo + ricottura + decapaggio + passaggio cutaneo
• Uniform industrial appearance

Performance features:

• Buona resistenza alla corrosione
• Ottima formabilità
• Widely used standard finish

Typical applications:

• Attrezzature da cucina
• Macchine per la lavorazione alimentare
• Industrial panels
• Fabbricazione generale

2. Finitura BA (Ricotto brillante)

Caratteristiche:

• Altamente riflettente, superficie a specchio
• Produced in a controlled atmosphere furnace
• No additional polishing required

Performance features:

• Excellent surface smoothness
• High aesthetic value
• Buona resistenza alla corrosione

Typical applications:

• Pannelli decorativi
• Interni dell'ascensore
• Elettrodomestici
• Architectural design

3. 2D Fine (Dull Cold Rolled Surface)

Caratteristiche:

• Opaco, slightly rough surface
• Less reflective than 2B
• Basic cold rolled finish before skin pass

Performance features:

• Good for further processing
• Suitable for industrial forming

Typical applications:

• Deep drawing parts
• Componenti industriali
• Fabbricazione strutturale

4. Lucido / Finitura spazzolata (Post-Processing)

These finishes are applied after cold rolling.

Common types:

• Attaccatura dei capelli (HL brushed)
• Lucidato a specchio (8Finitura K)
• Finitura satinata

Performance features:

• Aspetto decorativo
• Enhanced surface texture
• High visual impact

Typical applications:

• Decorazione architettonica
• Progettazione degli interni
• Luxury equipment panels

Hot Rolled vs Cold Rolled Surface Comparison

Why Surface Finish Matters

The surface finish directly affects:

• Corrosion resistance performance
• Welding and forming behavior
• Cleaning and hygiene requirements
• Final product appearance
• Processing cost efficiency