Lembaran Baja Ringan Canai Panas
Hot rolled mild steel sheet is widely used due to its cost efficiency, excellent workability, and reliable mechanical performance. Common grades such as A36, S235, and Q235 are ideal for structural and general industrial use.
Hot rolled stainless steel sheets, termasuk 304, 316, Dan 2205, offer enhanced corrosion resistance and durability, making them suitable for demanding environments such as chemical processing and marine applications.
- Keterangan
Hot rolled mild steel sheet is produced by rolling steel at high temperatures, typically above 900°C. At this temperature, the steel becomes more ductile and can be easily formed into sheets, piring, dan kumparan.
Key characteristics:
- Scaled, rough surface finish
- Excellent formability and ductility
- Kemampuan las yang baik
- Lower production cost compared to cold rolled steel
- Wider dimensional tolerances
It is widely used in structural and industrial applications where surface finish is not critical.
Common Grades of Hot Rolled Mild Steel Sheet
Hot rolled mild steel grades are defined by international standards such as ASTM, DI DALAM, and GB.
Typical Grade Comparison Table
| Nilai | Standar | Kekuatan Hasil (MPa) | Kekuatan Tarik (MPa) | Pemanjangan (%) |
|---|---|---|---|---|
| A36 | ASTM | ≥250 | 400–550 | 20–23 |
| S235 | DI DALAM 10025 | ≥235 | 340–470 | ≥26 |
| S275 | DI DALAM 10025 | ≥275 | 430–580 | ≥22 |
| S355 | DI DALAM 10025 | ≥355 | 470–630 | ≥22 |
| Q235 | GB/T 700 | ≥235 | 370–500 | 20–25 |
| Q345 | GB/T 700 | ≥345 | 470–630 | 20–22 |
| 1018 | AISI/SAE | 310–420 | 380–540 | ≥28 |
Grade Characteristics
- Low carbon steel (≤0.25%): Excellent forming and welding performance
- Medium carbon steel (0.25–0.6%): Kekuatan yang lebih tinggi, lower ductility
- High carbon steel (>0.6%): Kekerasan tinggi, limited formability
Industrial Properties of Hot Rolled Mild Steel
Mechanical Performance
- Moderate strength with good toughness
- High ductility suitable for bending and forming
- Stable mechanical properties for large-scale applications
Fabrication Advantages
- Easy to cut, drill, dan mengelas
- Suitable for heavy fabrication and structural components
- Efficient for mass production
Karakteristik Permukaan
- Oxide scale formed during hot rolling
- Not suitable for decorative applications without further processing
- Can be pickled or coated for improved appearance and corrosion resistance
Aplikasi Khas
- Structural frames and supports
- Bahan konstruksi
- Komponen mesin
- Automotive structures
- Storage tanks and pipelines
Hot Rolled Stainless Steel Sheet – Grades and Industrial Performance
In industrial applications, hot rolled mild steel is often compared with hot rolled stainless steel due to differences in corrosion resistance and alloy composition.
Common Hot Rolled Stainless Steel Grades
Baja Tahan Karat Austenitik
- 304: Tujuan umum, ketahanan korosi yang sangat baik
- 316: Improved corrosion resistance with molybdenum, suitable for marine and chemical environments
- 321: Stabilized for high-temperature applications
Baja Tahan Karat Feritik
- 430: Magnetik, ketahanan korosi sedang
- 409: Ketahanan panas yang baik, commonly used in exhaust systems
Baja Tahan Karat Dupleks
- 2205: High strength combined with excellent corrosion resistance
Industrial Performance of Stainless Steel
Sifat Mekanik
- Good strength and ductility
- High impact resistance
- Suitable for both structural and precision applications
Ketahanan Korosi
- Chromium content forms a protective oxide layer
- Superior resistance to oxidation and chemical exposure
- 316 and duplex grades perform well in chloride environments
Processing Characteristics
- Surface scale after hot rolling
- Requires pickling or descaling for improved corrosion performance
- Good weldability with proper procedures
Aplikasi
- Peralatan pemrosesan kimia
- Struktur kelautan dan lepas pantai
- Mesin pengolah makanan
- Oil and gas industry
- Architectural and industrial systems
Mild Steel vs Stainless Steel (canai panas)
| Milik | Mild Steel Sheet | Lembaran Baja Tahan Karat |
|---|---|---|
| Komposisi | Karbon rendah | Alloyed with chromium, nikel |
| Ketahanan Korosi | Rendah | Tinggi |
| Kekuatan | Sedang | Moderate to high |
| Kemampuan las | Bagus sekali | Bagus sekali |
| Permukaan Selesai | Kasar, scaled | Scaled (can be pickled) |
| Aplikasi | Struktural dan industri | Lingkungan yang korosif dan berkinerja tinggi |
