S31803 Duplex Stainless Steel Coil is a high-performance duplex stainless steel product supplied by Jiangsu Cunrui Metal Products Co., Ltd. It features a balanced duplex microstructure combining austenitic and ferritic phases, providing excellent corrosion resistance, high strength, and wear resistance.
Each coil is manufactured in accordance with ASTM A240 / ASTM A789 / EN 10088 standards, ensuring consistency and reliability. All coils are supplied with Mill Test Certificates (MTC), chemical composition reports, and optional third-party certifications, guaranteeing that every S31803 Duplex Stainless Steel Coil meets stringent quality standards.
Key Features & Advantages
Outstanding corrosion resistance, including resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion.
High mechanical strength allows thinner gauges with the same structural integrity compared to conventional austenitic stainless steel.
Wear and abrasion resistance for demanding industrial environments.
Certified quality with ISO, PED, and third-party inspection compliance.
Cost-effective solution with long service life and reduced maintenance.
Applications
S31803 Duplex Stainless Steel Coil is widely used in industries requiring both strength and corrosion resistance:
Chemical and petrochemical processing equipment
Offshore and marine structures
Heat exchangers, tanks, and pressure vessels
Piping systems for seawater and brine
Desalination plants and water treatment facilities
Pulp and paper industry equipment
Product Specifications & Technical Data
Basic Information
|
Parameter |
Specification |
|
Standard |
ASTM A240 / ASTM A789 / EN 10088 |
|
Grade |
S31803 Duplex Stainless Steel |
|
Coil Thickness |
0.5 – 6.0 mm, custom thickness available |
|
Coil Width |
1000 – 2000 mm, can be customized |
|
Coil Weight |
1 – 8 tons per coil, as per requirement |
|
Surface Finish |
2B, BA, No.1, Polished, Pickled |
|
Yield Strength |
≥ 450 MPa |
|
Tensile Strength |
655 – 850 MPa |
|
Hardness |
≤ 28 HRC |
|
Corrosion Resistance |
Excellent resistance to pitting, SCC, and general corrosion |
|
Coil Form |
Hot-rolled or cold-rolled, available as coil or strip |
Chemical Composition (% by weight)
|
Element |
Content (%) |
|
Chromium (Cr) |
21.0 – 23.0 |
|
Nickel (Ni) |
4.5 – 6.5 |
|
Molybdenum (Mo) |
2.5 – 3.5 |
|
Nitrogen (N) |
0.08 – 0.20 |
|
Manganese (Mn) |
≤ 2.0 |
|
Silicon (Si) |
≤ 1.0 |
|
Carbon (C) |
≤ 0.03 |
|
Phosphorus (P) |
≤ 0.03 |
|
Sulfur (S) |
≤ 0.02 |
|
Iron (Fe) |
Balance |
Customization Services
At Jiangsu Cunrui Metal Products Co., Ltd., we provide full customization to meet project needs:
Special thicknesses, widths, and lengths per client requirements
Cutting, slitting, leveling, and polishing services
Surface treatments: pickling, passivation, bright annealing
Flexible MOQ and rapid production for urgent orders
Multiple duplex stainless steel grades available
Price & Delivery
Competitive pricing with bulk order discounts
Stock coils available for fast shipment
Custom orders delivered within 15–30 days, depending on specifications
Our Strength
Over 15 years of duplex stainless steel manufacturing experience
Advanced production lines and large-scale capacity
Certifications: ISO, PED, CE, and third-party approvals
Experienced R&D and technical support team
Extensive global export experience to Europe, Middle East, and North America
Service & Support
Quick response to inquiries (within 12 hours)
Technical guidance for material selection, process advice, and application solutions
Export-standard packaging (wooden crates, steel frames, seaworthy packing)
After-sales support: replacement or return in case of quality issues
Continuous order tracking until delivery
FAQ
Q1: What standards do your S31803 Duplex Stainless Steel Coils comply with?
A1: All coils are produced per ASTM A240 / ASTM A789 / EN 10088 standards, with MTC and optional third-party inspection certificates.
Q2: Can you supply custom coil thickness and width?
A2: Yes, we provide tailored dimensions, cutting, leveling, and polishing services per drawings.
Q3: Do you provide corrosion and mechanical test certificates?
A3: Yes, EN 10204 3.1/3.2 certificates, chemical composition reports, and NDT/hardness reports are available.
Q4: What is your typical delivery time?
A4: Stock coils ship within 7–10 days; custom orders usually 15–30 days depending on size and quantity.
Q5: Do you export globally?
A5: Yes, we have extensive export experience to Europe, Middle East, North America, and other regions.
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