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Introduction
The S31803 Duplex Stainless Steel Bar features austenitic-ferritic microstructures, meets ASTM A276/A479 and EN 10088 standards, and is suitable for petrochemical, marine, chemical, and water treatment applications.
Advantage
Superior Corrosion Resistance
The duplex structure resists chloride and pitting corrosion.
High Strength
Ferritic-austenitic microstructure provides a yield strength of ≥450 MPa and tensile strength of 650–850 MPa.
Versatile Machinability
Can be machined, welded, and polished with custom finishes, supporting complex fabrication.
Specification
|
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 |
Applications
Oil & Gas: Pump shafts, piping systems, heat exchanger components
Marine Engineering: Ship structures, propeller shafts, offshore platforms
Chemical & Petrochemical: Reactors, storage tanks, valves
Water Treatment & Desalination: Equipment exposed to high-chloride or aggressive environments
Customization
|
Feature |
Options |
|
Dimensions & Sizes |
Custom diameters, lengths, and shapes |
|
Cutting & Machining |
Precision cutting, turning, drilling, and threading |
|
Surface Finish |
Annealed, pickled, polished, sandblasted |
|
Welding & Fabrication |
Supports welding and assembly into components |
|
Mechanical Properties |
Adjust yield strength, tensile strength, or hardness per request. |
|
Special Features |
Holes, grooves, chamfers, or other modifications |
|
Order Flexibility |
Small or large batch production supported |
Delivery & Packaging
Stock Items: Quick shipping for standard sizes.
Custom Orders: 15–30 days depending on quantity/specs.
Packaging: Anti-corrosion and export-compliant.
Why Partner with Us
Reliable Quality
ISO-certified processes and partnerships with leading steel mills guarantee consistent material quality.
Large Inventory
An extensive stock of plates, pipes, and rods enables fast order fulfillment.
Custom Processing & OEM
Advanced machining centers provide cutting, bending, CNC machining, welding, and branding per customer specifications.
Rapid Customer Response
Professional 24/7 service ensures quick responses to technical and logistics inquiries.
FAQ
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