- وصف
Duplex stainless steel sheet is a type of stainless steel that combines austenitic and ferritic microstructures, typically in a 50/50 ratio. This dual-phase structure provides قوة عالية, مقاومة ممتازة للتآكل, and good weldability, making duplex stainless steels widely used in البحرية, كيميائية, and oil & gas industries.
Compared with conventional stainless steels like 304 أو 316, duplex grades offer higher strength and better resistance to stress corrosion cracking.
Main Types of Duplex Stainless Steel Grades
Duplex stainless steels are generally classified into three main categories:
1. Standard Duplex Stainless Steel
These are the most commonly used duplex grades with balanced performance.
Typical Grades
- 2205 (UNS S32205 / S31803)
- 2304 (UNS S32304)
صفات
- Good balance of strength and corrosion resistance
- Widely used in general industrial applications
- Cost-effective compared to super duplex
2. سوبر دوبلكس ستانلس ستيل
Super duplex grades contain higher levels of chromium, الموليبدينوم, والنيتروجين, offering superior performance.
Typical Grades
- 2507 (الولايات المتحدة S32750)
- الولايات المتحدة S32760 (Zeron 100 type)
صفات
- Excellent resistance to pitting and crevice corrosion
- High strength in harsh environments
- Suitable for offshore and marine conditions
3. Lean Duplex Stainless Steel
Lean duplex grades have lower alloy content, providing a more economical option.
Typical Grades
- 2101 (الولايات المتحدة S32101)
- إل دي إكس 2404 (UNS S82441)
صفات
- Lower nickel content reduces cost
- مقاومة التآكل المعتدلة
- Suitable for structural and less aggressive environments
Duplex Stainless Steel Grades Overview Table
| Category | درجة | UNS Number | الميزات الرئيسية | التطبيقات النموذجية |
|---|---|---|---|---|
| دوبلكس لين | 2101 | S32101 | فعالة من حيث التكلفة, قوة معتدلة | Structural, بناء |
| دوبلكس لين | 2304 | S32304 | مقاومة جيدة للتآكل | صهاريج التخزين, الاستخدام العام |
| دوبلكس قياسي | 2205 | S32205 / S31803 | Balanced performance | كيميائي, البحرية |
| سوبر دوبلكس | 2507 | S32750 | مقاومة عالية للتآكل | في الخارج, seawater systems |
| سوبر دوبلكس | S32760 | S32760 | Extreme durability | زيت & غاز, تحلية المياه |
Key Characteristics of Duplex Stainless Steel
- قوة عالية (about twice that of austenitic stainless steel)
- Excellent resistance to stress corrosion cracking
- Good pitting and crevice corrosion resistance
- Better thermal conductivity than austenitic grades
- Good weldability with proper control
التطبيقات المشتركة
Duplex stainless steel sheets are widely used in:
Oil and Gas Industry
- Pipelines and pressure vessels
- المنصات البحرية
الهندسة البحرية
- Ship components
- Seawater handling systems
Chemical Processing
- صهاريج التخزين
- مبادلات حرارية
Construction and Infrastructure
- Bridges and structural components
- Water treatment facilities
Teda Ganghua – Supply Capability
تيدا جانجوا supplies a wide range of duplex stainless steel sheets:
- Full grade coverage (lean, معيار, super duplex)
- Various thickness and size options
- Custom cutting and fabrication services
- Strict quality inspection and export standards
With strong inventory and processing capability, يوفر تيدا جانجوا reliable duplex stainless steel solutions for demanding industrial applications.
