- Penerangan
2507 plat keluli tahan karat (also known as Super Duplex Stainless Steel) is a high-performance duplex alloy combining austenitic and ferritic microstructures. It is designed for extremely aggressive environments where both high strength and outstanding corrosion resistance are required. Compared with standard duplex grades like 2205, 2507 offers significantly improved resistance to chloride pitting, kakisan celah, dan retakan kakisan tegasan.
Komposisi Kimia bagi 2507 Plat Keluli Tahan Karat
The balanced high chromium, nikel, and molybdenum content gives 2507 its super duplex performance.
| unsur | kandungan (%) |
|---|---|
| Chromium (Cr) | 24.0–26.0 |
| Nikel (Dalam) | 6.0–8.0 |
| Molibdenum (Mo) | 3.0–5.0 |
| Nitrogen (N) | 0.24–0.32 |
| Karbon (C) | ≤ 0.03 |
| Mangan (Mn) | ≤ 1.20 |
| silikon (Dan) | ≤ 0.80 |
| Fosforus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.02 |
| Besi (Fe) | Keseimbangan |
Sifat Mekanikal bagi 2507 Keluli Tahan Karat
2507 stainless steel provides very high strength while maintaining good toughness and corrosion resistance.
| Harta benda | Nilai Biasa |
|---|---|
| Kekuatan Tegangan | 800–1000 MPa |
| Kekuatan Hasil | ≥ 550 MPa |
| Pemanjangan | ≥ 15–25% |
| Kekerasan | ≤ 300 HB |
| Ketumpatan | 7.8 g/cm³ |
Ciri Prestasi Utama
1. Rintangan Kakisan Cemerlang
2507 stainless steel is designed for extreme corrosion environments, offering superior resistance to:
- Seawater and marine environments
- Chloride-rich chemical solutions
- Acidic and oxidizing conditions
- Offshore oil and gas systems
Its pitting resistance equivalent number (KAYU) is very high, making it suitable for long-term seawater exposure.
2. Kekuatan Tinggi (Dual Phase Structure)
The duplex structure (ferit + austenit) gives 2507:
- Nearly double the strength of 304/316 keluli tahan karat
- Excellent load-bearing capacity
- Reduced material thickness for same strength requirements
- Rintangan keletihan yang baik
3. Resistance to Stress Corrosion Cracking
Unlike standard austenitic stainless steels, 2507 has excellent resistance to chloride stress corrosion cracking, making it ideal for offshore and seawater applications.
4. Good Thermal Conductivity and Stability
Berbanding dengan gred austenit, 2507 tawaran:
- Better thermal conductivity
- Lower thermal expansion
- Stable performance under temperature variation
Aplikasi Biasa bagi 2507 Plat Keluli Tahan Karat
2507 stainless steel plate is widely used in highly corrosive and high-strength engineering environments.
Aplikasi biasa termasuk:
- Offshore oil and gas platforms
- Seawater desalination systems
- Marine engineering structures
- Peralatan pemprosesan kimia
- Heat exchangers and pressure vessels
- Flue gas desulfurization (FGD) sistem
- Pulp and paper industry equipment
- Subsea pipelines and components
- High-pressure seawater systems
- pam, injap, and fittings
2507 Duplex vs 2205 Keluli Tahan Karat Dupleks
| Harta benda | 2507 Keluli Tahan Karat | 2205 Keluli Tahan Karat |
|---|---|---|
| taip | Super Dupleks | Dupleks |
| Rintangan Kakisan | Lebih tinggi | bagus |
| kekuatan | Lebih tinggi | tinggi |
| PREN Value | ~40+ | ~35 |
| Rintangan Klorida | Cemerlang | bagus |
| Penggunaan Biasa | Severe offshore/chemical | General marine/industrial |
