Duplex Stainless Steel Coil S31803/S32205
Duplex Stainless Steel Coil S31803/S32205
Introduction:
The S31803 and S32205 duplex stainless steel coils are high-performance materials designed for industrial, chemical, petrochemical, and offshore applications where superior corrosion resistance and high strength are critical. Featuring a duplex microstructure combining ferritic and austenitic phases, these coils provide excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, while maintaining high tensile strength and durability. The continuous coil form enables efficient fabrication, cutting, and shaping, making it ideal for pipelines, tanks, heat exchangers, and structural applications. The pickled and passivated surface ensures enhanced corrosion resistance and a smooth, cleanable finish, suitable for industrial and chemical process environments.
Material Table:
| Material Grade | Description | Key Properties |
|---|---|---|
| S31803 Duplex Stainless Steel | Ferritic-Austenitic duplex stainless steel | Excellent corrosion resistance, high tensile strength, suitable for chemical, petrochemical, and offshore applications |
| S32205 Duplex Stainless Steel | Super duplex stainless steel | Superior pitting and crevice corrosion resistance, high strength, ideal for chloride-rich environments |
Specifications Table:
| Parameter | Value / Range |
|---|---|
| Standard | ASTM A240 / EN 10088 |
| Coil Type | Continuous Coil |
| Thickness | 0.5mm – 6mm |
| Width | 500mm – 1500mm |
| Coil Weight | 1 ton – 10 tons |
| Surface Finish | Pickled & Passivated / 2B / Polished |
| Material | S31803 / S32205 Duplex Stainless Steel |
Manufacturing Process Table:
| Step | Description |
|---|---|
| Raw Material Selection | Premium S31803 or S32205 duplex stainless steel slabs |
| Hot Rolling | Rolled to desired thickness |
| Cold Rolling | Precision rolling for uniform dimensions and smooth surface |
| Heat Treatment | Solution annealing to optimize mechanical properties and corrosion resistance |
| Surface Treatment | Pickling and passivation for corrosion-resistant finish |
| Inspection & Testing | Thickness, width, surface, and mechanical quality checks |
| Packaging | Protective packaging to prevent scratches and deformation during storage and transport |
Uses / Applications Table:
| Industry / Application | Description |
|---|---|
| Chemical Industry | Tanks, piping, and process equipment for corrosive chemicals |
| Petrochemical Industry | High-pressure and corrosion-resistant pipelines |
| Offshore & Marine Applications | Seawater and chloride-rich piping and structural components |
| Heat Exchangers | Tubing for industrial heat transfer systems |
| Industrial Fabrication | Structural panels, enclosures, and machinery requiring corrosion resistance |
Advantages:
- Superior Corrosion Resistance: Exceptional performance in chloride, seawater, and chemical environments.
- High Strength: Duplex microstructure provides higher tensile strength than standard austenitic stainless steels.
- Durable & Long-Lasting: Minimizes maintenance and ensures long-term service life.
- Smooth Surface Finish: Pickled and passivated surface reduces scaling, fouling, and contamination.
- Versatile Applications: Suitable for chemical, petrochemical, offshore, heat exchanger, and industrial fabrication projects.
FAQ:
- Q: Can S31803/S32205 duplex stainless steel coils be used in seawater environments?
A: Yes, both grades offer excellent chloride and seawater corrosion resistance, suitable for offshore applications. - Q: Are custom thicknesses and coil sizes available?
A: Yes, thickness, width, and coil weight can be tailored to meet specific project requirements. - Q: Is it suitable for chemical and petrochemical plants?
A: Absolutely, these duplex coils are widely used for tanks, piping, and process equipment in chemical and petrochemical industries. - Q: How is quality ensured?
A: Coils undergo dimensional, surface, and mechanical inspections according to ASTM and EN standards.
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