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Stainless steel sheet metal finishes are divided into hot rolled and cold rolled categories, each serving different industrial needs:
- Hot rolled finishes (No.1, HRAP) are ideal for heavy-duty structural applications
- Cold rolled finishes (2B, BA, 2D, dipoles) are used for presisi, dekoratif, and hygienic applications
Selecting the correct finish is essential for balancing biaya, pertunjukan, and appearance requirements.
- Keterangan
Stainless steel sheet metal finishes refer to the surface condition created during manufacturing and processing. The finish directly affects:
- Penampilan
- Ketahanan korosi
- Kebersihan
- Kinerja fabrikasi
- 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. No.1 Selesai (Standard Hot Rolled Surface)
This is the most common hot rolled stainless steel finish.
Karakteristik:
- Kasar, dull gray surface
- Covered with oxide scale
- Produced by hot rolling followed by annealing and pickling
- Lower reflectivity
Performance features:
- Ketahanan panas yang baik
- Strong mechanical performance
- Suitable for heavy fabrication
Typical applications:
- Peralatan industri
- Tangki kimia
- Komponen struktural
- Mesin berat
2. Pickled Surface (HRAP – Hot Rolled Annealed and Pickled)
This is an improved hot rolled finish after acid cleaning.
Karakteristik:
- 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:
- Bejana tekan
- Bingkai struktural
- 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 Selesai (Most Common Cold Rolled Finish)
Karakteristik:
- Mulus, slightly reflective surface
- Diproduksi dengan pengerolan dingin + anil + pengawetan + skin pass
- Uniform industrial appearance
Performance features:
- Ketahanan korosi yang baik
- Sifat mampu bentuk yang luar biasa
- Widely used standard finish
Typical applications:
- Perlengkapan dapur
- Mesin pengolah makanan
- Industrial panels
- Fabrikasi umum
2. BA Selesai (Anil Cerah)
Karakteristik:
- Sangat reflektif, permukaan seperti cermin
- Produced in a controlled atmosphere furnace
- No additional polishing required
Performance features:
- Excellent surface smoothness
- High aesthetic value
- Ketahanan korosi yang baik
Typical applications:
- Panel dekoratif
- Interior lift
- Peralatan
- Architectural design
3. 2D Selesai (Dull Cold Rolled Surface)
Karakteristik:
- Matte, 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
- Komponen industri
- Fabrikasi struktural
4. Dipoles / Selesai Disikat (Post-Processing)
These finishes are applied after cold rolling.
Common types:
- Garis rambut (HL brushed)
- Mirror polished (8K selesai)
- Selesai satin
Performance features:
- Decorative appearance
- Enhanced surface texture
- High visual impact
Typical applications:
- Dekorasi arsitektur
- Desain interior
- Luxury equipment panels
Hot Rolled vs Cold Rolled Surface Comparison
| Fitur | Selesai Canai Panas | Cold Rolled Finish |
|---|---|---|
| Penampilan permukaan | Kasar, matte | Mulus, membersihkan |
| Oxide scale | Present (No.1) | Removed |
| Daya pemantulan | Rendah | Medium to high |
| Dimensional precision | Lebih rendah | Lebih tinggi |
| Main usage | Struktural & heavy industry | Presisi & penggunaan dekoratif |
Mengapa Permukaan Akhir Penting
The surface finish directly affects:
- Corrosion resistance performance
- Welding and forming behavior
- Cleaning and hygiene requirements
- Final product appearance
- Processing cost efficiency
