UNS S31803 Duplex Stainless Steel Pipe is a premium duplex alloy pipe supplied by Jiangsu Cunrui Metal Products Co., Ltd. It features a balanced duplex microstructure combining austenitic and ferritic phases, offering superior corrosion resistance and high mechanical strength. Each UNS S31803 Duplex Stainless Steel Tube is manufactured under strict quality control and meets international standards including ASTM A790, ASME SA790, and EN 10216-5.
These pipes are tested with full Mill Test Certificates (MTC), chemical composition reports, and optional third-party inspection certificates to ensure reliability. The grade exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, maintaining stable mechanical properties and wear resistance in harsh industrial environments.
Key Features & Advantages
High corrosion resistance in chloride-rich and aggressive chemical environments.
Superior strength compared to austenitic stainless steels, enabling thinner walls and lighter structures.
Stable mechanical properties and high wear resistance for demanding applications.
Certified quality with ISO, PED, and third-party inspection compliance.
Cost-effective solution with extended service life and reduced maintenance requirements.
Applications
UNS S31803 Duplex Stainless Steel Pipe is ideal for industries requiring a combination of strength and corrosion resistance:
Chemical and petrochemical plants
Oil & gas pipelines and processing units
Seawater desalination plants
Pulp and paper industry
Marine engineering and offshore platforms
Heat exchangers and pressure vessels
Product Specifications & Technical Data
|
Parameter |
Specification |
|
Standard |
ASTM A790 / ASTM A928 / ASME SA790 / EN 10216-5 |
|
Grade |
UNS S31803 Duplex Stainless Steel |
|
Outside Diameter (OD) |
1/2" – 48" (DN15 – DN1200) |
|
Wall Thickness (WT) |
SCH 5S – SCH XXS, custom sizes available |
|
Length |
5.8m, 6m, 12m, or cut-to-length |
|
Surface Finish |
Pickled, Annealed, Polished, 2B / BA / Custom Finish |
|
Yield Strength |
≥ 450 MPa |
|
Tensile Strength |
655 – 850 MPa |
|
Hardness |
≤ 28 HRC |
|
Corrosion Resistance |
Excellent resistance to pitting (PREN ~33), SCC, and erosion wear |
Customization Services
At Jiangsu Cunrui Metal Products Co., Ltd., we provide tailored solutions:
Custom dimensions and wall thicknesses on request
Machining, cutting, beveling, threading, or welding preparation
Surface treatments: polishing, passivation, pickling
Multiple duplex stainless steel grades available
Flexible MOQ and quick delivery for urgent orders
Price & Delivery
We offer competitive pricing, bulk order discounts, and fast shipment for stocked sizes. Custom orders are produced with controlled lead times to meet project schedules.
Our Strength
Over 15 years of duplex stainless steel manufacturing and export experience
Advanced production lines with large-scale capacity
Full certifications: ISO, PED, CE, and third-party approvals
Experienced technical team and R&D support
Long-term supply to Europe, Middle East, and North America
Service & Support
Prompt inquiry response within 12 hours
Technical consultation for material selection and process advice
Export-standard packaging (wooden crates, steel frames, seaworthy packing)
Comprehensive after-sales support with replacement or return for quality issues
Continuous order tracking until delivery
FAQ
Q1: Which standards do your UNS S31803 Duplex Stainless Steel Pipes comply with?
A1: Pipes are produced per ASTM, ASME, and EN standards, with MTC and optional third-party inspection.
Q2: Can you supply custom lengths and machining services?
A2: Yes, we offer precision cutting, beveling, threading, and other machining services per drawings.
Q3: Do you provide corrosion and mechanical test certificates?
A3: Yes, we supply EN 10204 3.1/3.2 certificates along with NDT and hardness reports.
Q4: What is your typical delivery time?
A4: Standard sizes 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.
Hot Tags: uns s31803 duplex stainless steel pipe, China uns s31803 duplex stainless steel pipe manufacturers, factory, S32304 Duplex Stainless Steel Tube, S32101 Duplex Stainless Steel Pipe, S32760 Super Duplex Stainless Steel Pipe, S32101 Duplex Stainless Steel Tube, 2205 Duplex Stainless Steel Pipe, S32760 Super Duplex Stainless Steel Tube
