The S31803 Duplex Steel Bar is a premium stainless steel alloy designed for superior strength, excellent corrosion resistance, and high reliability in demanding industrial applications. Engineered to meet international standards such as ASTM A276, ASTM A479, and EN 10088, this duplex steel combines approximately equal proportions of austenitic and ferritic microstructures, offering an exceptional balance of mechanical performance and durability.
Each batch of S31803 Duplex Steel Bars undergoes rigorous quality inspection, including chemical composition analysis, mechanical testing, and optional third-party certification. Material Test Certificates (MTCs) are provided to ensure traceability and compliance with global industrial standards. The alloy exhibits excellent resistance to pitting, stress corrosion cracking, and wear, making it ideal for harsh environments.
Key Features & Advantages
Enhanced Corrosion Resistance: S31803 Duplex Steel Rod provides excellent resistance to chloride and acidic environments, outperforming conventional austenitic stainless steels.
High Strength: With superior yield and tensile strength, this duplex steel is suitable for structural and high-stress applications.
Durable & Stable: Maintains consistent performance over long-term use, reducing maintenance costs.
Certified Quality: Conforms to ASTM and EN standards, with third-party testing and MTCs available for assurance.
Cost-Effective: Offers the performance of higher alloy steels at a more economical price.
Applications
S31803 Duplex Steel Bar is widely applied across industries that require a combination of strength and corrosion resistance:
Oil & Gas: Pump shafts, piping systems, heat exchanger components.
Marine Engineering: Offshore platforms, ship structures, propeller shafts.
Chemical & Petrochemical: Reactors, storage tanks, valves.
Water Treatment & Desalination: Equipment exposed to high-chloride or aggressive environments.
Product Specifications & Technical Data
|
Item |
Specification |
Description |
|
Material |
S31803 Duplex Stainless Steel |
Meets ASTM A276/A479, EN 10088 |
|
Diameter |
10–180 mm (customized) |
Can be processed according to customer drawings |
|
Length |
1000–6000 mm |
Cut-to-length available |
|
Yield Strength |
≥ 450 MPa |
High strength for demanding applications |
|
Tensile Strength |
650–850 MPa |
Excellent load-bearing capacity |
|
Hardness |
≤ 32 HRC |
Adjustable via heat treatment or machining |
|
Surface Finish |
Annealed, pickled, polished |
Meets export and client requirements |
|
Test Reports |
MTC, third-party inspection |
EN 10204 3.1 or 3.2 available |
S31803 Duplex Steel – Chemical Composition
|
Element |
Content (%) |
|
C (Carbon) |
≤ 0.030 |
|
Cr (Chromium) |
21.0 – 23.0 |
|
Ni (Nickel) |
4.5 – 6.5 |
|
Mo (Molybdenum) |
2.5 – 3.5 |
|
N (Nitrogen) |
0.08 – 0.20 |
|
Mn (Manganese) |
≤ 2.0 |
|
Si (Silicon) |
≤ 1.0 |
|
P (Phosphorus) |
≤ 0.030 |
|
S (Sulfur) |
≤ 0.020 |
|
Fe (Iron) |
Balance |
Customization Services
Supports special sizes, cutting, hole drilling, welding, and other machining requirements.
Production based on customer drawings or technical specifications.
Multiple surface finish options: pickling, polishing, sandblasting, etc.
Flexible minimum order quantity and rapid response to custom orders.
Price & Delivery
Competitive pricing with bulk order discounts.
Stock available for immediate shipment; delivery schedules are controllable.
Custom orders usually 15–30 days depending on quantity and specifications.
Our Strength
Jiangsu Cunrui Metal Products Co., Ltd. offers:
Large-scale manufacturing facilities with annual stainless steel bar production exceeding 5,000 tons.
Advanced equipment for precision machining and quality control.
Extensive export experience, serving Europe, North America, the Middle East, and Asia.
Professional technical and R&D team, continuously enhancing material performance and manufacturing processes.
Service & Support
Rapid inquiry response: Technical and quotation support within 24 hours.
Expert guidance: Helps customers select optimal materials and solutions.
Secure packaging & shipping, compliant with export standards.
After-sales guarantee: Quality issues can be returned or replaced, ensuring worry-free procurement.
FAQ
Q1: Can S31803 Duplex Steel Bar be used in seawater or chloride-rich environments?
A1: Yes, it offers excellent resistance to chloride-induced corrosion, suitable for marine and offshore applications.
Q2: Are third-party inspection reports available?
A2: Yes, EN 10204 3.1 or 3.2 reports and MTCs are available for all batches.
Q3: Can you process according to customer drawings?
A3: Yes, including cutting, hole drilling, welding, and surface finishing.
Q4: What is the minimum order quantity?
A4: Flexible, depending on customer needs.
Q5: What is the typical delivery time?
A5: Stock is available for immediate shipment; custom orders usually 15–30 days.
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