Duplex Steel S31803/S32205 Round Bars & Rods
Mechanical Strength • Accuracy & Straightness • Quality & Finish
Get a QuoteDuplex Steel S31803 / S32205 Explained
Duplex Steel S31803 / S32205 is a nitrogen-enhanced duplex stainless steel. To begin with, it offers a balanced microstructure of austenite and ferrite — providing an excellent combination of high strength, toughness, and superior corrosion resistance. Furthermore, it delivers significantly higher yield strength than conventional austenitic stainless steels while maintaining good weldability and resistance to stress corrosion cracking, pitting, and crevice corrosion.
Why do engineers and project managers choose Duplex Steel S31803 / S32205 for critical infrastructure? First and foremost, it provides nearly double the yield strength of standard 316L stainless steel. In addition, its superior corrosion resistance ensures long service life in aggressive environments. Moreover, its cost efficiency combined with high performance makes it a smart investment for demanding industrial applications.
Consequently, Duplex Steel S31803 / S32205 is widely used in oil and gas pipelines, chemical processing equipment, and heat exchangers. Furthermore, it is also trusted in pressure vessels, marine applications, and structural components. Equally important, its combination of strength, durability, and corrosion resistance makes it a preferred choice for demanding industrial environments where reliability and long service life are essential.
Need high-quality Duplex Steel round bars for your project? Contact our technical team today — we’ll help you select the right size, grade (S31803 or S32205), and specifications for your requirements, and provide a competitive quote tailored to your needs.
Other Types of Duplex Steel S31803 / S32205 Bars
- Duplex steel S31803 / S32205 square bars with high yield strength
- Material grades: UNS S31803 / UNS S32205
- Manufactured as per ASTM A276 and ASME SA276
- Excellent resistance to stress corrosion cracking
- Hexagonal bars in duplex stainless steel for heavy-duty use
- Produced under ASTM A276 duplex steel specifications
- Equivalent standards: DIN 1.4462 / UNS S32205
- Available in bright drawn and polished finishes
- Rectangular bars offering superior mechanical strength
- Manufactured to ASTM A276 / ASME SA276 standards
- Grades: UNS S31803 / S32205 duplex stainless steel
- Ideal for structural, marine, and pressure applications
- Duplex flat bars with excellent strength-to-corrosion balance
- Material conforms to UNS S31803 / UNS S32205
- Manufactured according to ASTM A276 specifications
- Supplied in hot rolled, polished, and machined condition
- Bright drawn duplex bars with smooth surface quality
- Suitable for shafts, fasteners, and precision components
- Produced as per ASTM A276 duplex steel standards
- Ensures dimensional accuracy and straightness
- Forged duplex bars designed for high-load environments
- Superior toughness and resistance to chloride corrosion
- Material grades: UNS S31803 / S32205
- Commonly used in oil & gas, marine, and pressure systems
S31803 / S32205 DUPLEX STEEL ROUND BAR EQUIVALENT GRADES
| STANDARD | UNS | WNR. |
|---|---|---|
| Duplex Steel 2205 | S31803 / S32205 | 1.4462 |
SPECIFICATION OF DUPLEX STEEL S31803 / S32205 ROUND BAR
| Standard | ASTM A276 / A479, ASME SA276 / SA479 |
|---|---|
| Dimension Standard | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Size | 14 mm – 300 mm |
| Length | 1 to 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex (AF), Rectangle, Billet, Ingot, Forged |
CHEMICAL COMPOSITION OF DUPLEX STEEL S31803 / S32205 ROUND BAR
| Grade | C % | Mn % | Si % | P % | S % | Cr % | Ni % | Mo % | N % |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | 0.08 – 0.20 |
| S32205 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | 22.0 – 23.0 | 4.5 – 6.5 | 3.0 – 3.5 | 0.14 – 0.20 |
MECHANICAL PROPERTIES OF DUPLEX STEEL S31803 / S32205 ROUND BAR
| Property | Value |
|---|---|
| Tensile Strength | 620 MPa (min) |
| Yield Strength (0.2% Offset) | 450 MPa (min) |
| Elongation | 25 % (min) |
| Density | 7.8 g/cm³ |
| Elastic Modulus | 200 GPa |
PHYSICAL PROPERTIES OF DUPLEX STEEL S31803 / S32205 ROUND BAR
| Property | Value |
|---|---|
| Density | 0.286 lb/in³ |
| Thermal Conductivity | 9.3 BTU/hr-ft-°F at 200°F |
| Coefficient of Thermal Expansion | 9.2 × 10⁻⁶ /°F (68–212°F) |
| Specific Heat | 0.12 BTU/lb-°F |
| Modulus of Elasticity | 28 × 10⁶ psi (E) |
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