Duplex Stainless Steel 2205 Round Bar
➡️ Duplex 2205 | Alloy 2205 | Duplex 22Cr | UNS S31803 | UNS S32205 | EN 1.4462
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Duplex Stainless Steel
UNS Number:
S31803 / S32205
Wr. No.:
1.4462
MTC Available:
EN 10204 3.1
Product Description for Duplex Stainless Steel 2205 Round Bar
Duplex 2205 round bar is a 22% chromium, ferritic-austenitic (duplex) stainless steel bar product supplied under UNS S31803 and its more tightly controlled variant UNS S32205, EN material number 1.4462. The microstructure is a roughly balanced mix of ferrite and austenite (approximately 40–50% ferrite in the solution-annealed condition), which combines the higher strength of ferritic grades with the toughness and weldability associated with austenitic stainless steels. Chromium, molybdenum, and nitrogen additions give 2205 a Pitting Resistance Equivalent Number (PREN) of approximately 34–36, placing its localized corrosion resistance above Type 316/316L and close to that of 6% Mo super-austenitic grades in many chloride-bearing media.
2205 round bar is produced as hot-rolled, forged, or cold-drawn bar, then solution annealed at approximately 1020–1100°C and rapidly water quenched to restore phase balance and corrosion resistance. It is governed by ASTM A276 (general bar and shapes) and ASTM A479 (bar for boilers and pressure vessels), with EN 10088-3 covering the equivalent European bar and forging product form. UNS S32205 is a restricted-composition version of S31803 with guaranteed minimum nitrogen and molybdenum, and most bar currently produced is dual-certified to both UNS numbers.
Typical applications include chemical processing and storage equipment, oil and gas piping and downhole components, seawater and brackish-water heat exchangers, pulp and paper digesters, and structural components in marine and offshore environments where chloride stress corrosion cracking and pitting are governing failure modes. Yield strength is roughly twice that of standard austenitic grades, allowing wall-thickness or section-size reductions in pressure-retaining and load-bearing components. Purchasers should specify the governing bar standard (A276 vs. A479), required delivery condition (solution annealed), and whether S31803 or the tighter S32205 composition is required, since this affects guaranteed PREN and mechanical minimums. Service above approximately 300°C is generally avoided due to embrittling phase precipitation, and use below approximately −50°C requires evaluation of the ductile-to-brittle transition.
Common Applications of Duplex Stainless Steel 2205 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for Duplex 2205 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS S31803 / UNS S32205
ASTM
USA
ASTM A276 / A479
AISI / SAE
USA
A182 Grade F51 (S31803) / F60 (S32205)
JIS
Japan
SUS329J3L (JIS G4303 / G4318 / G3459)
EN
Europe
1.4462, X2CrNiMoN22-5-3 (EN 10088-3)
BS
United Kingdom
BS 318S13 / BS EN 10088-3 1.4462
GB / GB/T
China
022Cr22Ni5Mo3N / 022Cr23Ni5Mo3N
KS
South Korea
STS329J3L (KS D 3703 / KS D 3705)
ISO / International
International
ISO 15510, X2CrNiMoN22-5-3
Technical Specification for Duplex Stainless Steel 2205 Round Bar
Specification
Value
Unit
Material
Duplex stainless steel
-
Grade
UNS S31803 / S32205
-
Standard
ASTM A276, ASTM A479, EN 10088-3
-
Product Form
Round bar (hot-rolled, forged, or cold-drawn)
-
Diameter
6 - 450
-
Length
3000 - 6000 or Customized length available
mm
Manufacturing Process
Hot rolled or forged, then solution annealed; cold-drawn/bright bar
-
Surface Finish
Black/hot-rolled, turned, or bright cold-drawn
-
Heat Treatment
Solution annealed, rapid water quench
-
Delivery Condition
Solution annealed and quenched (Condition A)
-
Tolerance Standard
ASTM A484 (cold-finished) / EN 10060 (hot-rolled round bar) / EN 10278 (bright bar), per ordering standard
-
Dimensional Tolerance
Depends on finish class (h9-h11 for cold-drawn; wider for hot-rolled) - confirm against ordering standard
mm
Straightness
Typically ≤ 1–3 mm/m, per applicable dimensional standard
mm/m
Carbon Equivalent (CEV)
Not applicable
-
Density
7.80
g/cm³
Magnetic Properties
Ferromagnetic
-
Corrosion Resistance
High resistance to pitting, crevice corrosion, and chloride stress corrosion cracking; PREN reported in the range of approximately 33–36 across independent producer sources (formula-dependent: PREN = %Cr + 3.3×%Mo + 16×%N)
-
Thermal Conductivity
~16-19 (at 20°C)
W/m·K
Electrical Resistivity / Conductivity
~800
nΩ·m (at 20°C)
Specific Heat
~500
J/kg·K
Coefficient of Thermal Expansion
~13.0 × 10⁻⁶ (20–100°C)
/K
Melting Range
~1385–1441 (2525–2626)
°C (°F)
Technical Specifications
Get the key technical specifications for Duplex Stainless Steel 2205 Round Bar
2205 round bar identification depends on both the UNS number and the governing bar standard: ASTM A276 is the general-purpose bar and shapes specification, while ASTM A479 (adopted by ASME as SA-479) is written for bar used in boilers and pressure vessels and carries additional requirements such as mandatory solution-annealing documentation and end hardness testing. Both standards cover the same S31803/S32205 chemistry but should not be treated as interchangeable on a purchase order — the applicable standard should be stated explicitly, particularly for ASME Code work. EN 10088-3 is the corresponding European bar and forging-billet standard and references the same 1.4462 material number.
2205 is a duplex grade, so its properties come from the ferrite-austenite phase balance rather than from a hardening heat treatment; bar is always supplied solution annealed and water quenched, and no subsequent heat treatment is expected to improve strength. Dimensional tolerances differ substantially between hot-rolled/forged black bar (governed by EN 10060 or supplier mill practice) and cold-drawn/bright bar (governed by EN 10278 or ASTM A484), so the required finish class should be specified alongside diameter. Because S32205 guarantees a narrower, higher nitrogen and molybdenum range than the base S31803 chemistry, buyers requiring the higher, more consistent PREN should specify S32205 (or dual-certified S31803/S32205) rather than S31803 alone.
Chemical Composition for Duplex Stainless Steel 2205 Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
-
0.030
%
Chromium
Cr
21
23
%
Nickel
Ni
4.50
6.50
%
Molybdenum
Mo
2.50
3.50
%
Manganese
Mn
-
2.00
%
Silicon
Si
-
1.00
%
Phosphorus
P
-
0.030
%
Sulfur
S
-
0.020
%
Nitrogen
N
0.08
0.08
%
Iron
Fe
-
Balance
%
Chemical Composition
View the chemical composition and applicable material limits for Duplex 2205 Round Bar
Chromium (21–23%) is the primary passivating element and, together with molybdenum (2.5–3.5%), governs resistance to pitting and crevice corrosion in chloride environments. Nitrogen (0.08–0.20%), a controlled interstitial addition unique to duplex and high-alloy austenitic grades, is essential to 2205’s performance: it strengthens the austenite phase, stabilizes the ferrite-austenite balance during welding and heat treatment, and contributes disproportionately to pitting resistance (reflected in the PREN formula’s ×16 nitrogen coefficient). The distinction between S31803 and S32205 is driven almost entirely by tighter, higher minimum limits on Mo and N, which raise and narrow the guaranteed PREN band.
Very low carbon (0.03% max) limits chromium carbide precipitation at phase boundaries during welding, preserving corrosion resistance in the heat-affected zone and supporting good weldability without mandatory post-weld solution annealing in most section sizes. Nickel (4.5–6.5%), lower than in comparable austenitic grades, is present primarily to control and balance the ferrite/austenite phase ratio rather than to independently drive corrosion resistance. Manganese and silicon are present largely as deoxidizers/processing aids at levels that do not significantly alter corrosion performance. Phosphorus and sulfur are held low to protect toughness and hot workability; sulfur in particular is minimized because it can promote hot shortness in the two-phase structure. Overall, the combination of high Cr/Mo/N gives 2205 corrosion resistance and strength that place it between standard austenitic (304/316) and super duplex/6% Mo grades, at a lower nickel and molybdenum cost than comparable austenitic alternatives such as 904L.
Mechanical Properties for Duplex Stainless Steel 2205 Round Bar
Mechanical Property
Value
Unit
Tensile Strength
620-880
MPa
Yield Strength (0.2%)
450 min
MPa
Elongation
25 min
%
Reduction of Area
Not specified
%
Hardness
270 - 293 max
HB
Impact / Charpy Properties
100 min
J
Proof Stress / 0.2% Proof Strength
450 min
MPa
Ultimate Tensile Strength
620 - 880
Ultimate Tensile Strength
Mechanical Properties
Check the key mechanical properties and performance requirements of Duplex 2205 Round Bar
2205’s guaranteed 450 MPa minimum yield strength is roughly double that of annealed 304/316 stainless steel, allowing thinner sections or reduced bar diameters in load-bearing shafts, fasteners, and pressure-retaining components while maintaining an adequate safety margin. The 25% minimum elongation indicates good ductility for a high-strength alloy, supporting cold forming and machining operations, though the duplex structure work-hardens more readily than austenitic grades and can require adjusted machining parameters (lower cutting speeds, positive rake tooling) to control tool wear and heat generation.
The 293 HB maximum hardness reflects the solution-annealed delivery condition and is not indicative of wear resistance in the same sense as hardened tool steels — 2205 is not intended for abrasive-wear service. Toughness (Charpy impact) is high at room temperature but is sensitive to thermal history: prolonged exposure between roughly 300–1000°C can precipitate brittle intermetallic phases (sigma, chi) that sharply reduce impact toughness and corrosion resistance, which is why service above approximately 300°C is generally avoided and why post-fabrication solution annealing is specified after hot forming or extended welding. At sub-zero temperatures, the ferrite phase’s ductile-to-brittle transition limits standard 2205 to service down to approximately −50°C unless impact-tested to a lower qualification temperature.
Dimension / Sizes for Duplex Stainless Steel 2205 Round Bar
Dimension / Size
Value
Unit
Diameter
6-450
mm
Standard Length
3000-6000
mm
Custom Length
Cut-to-length available to order
mm / m
Diameter Tolerance
Per ASTM A484 (cold-finished) or EN 10060/10278 (hot-rolled/bright), depending on ordered finish
mm
Length Tolerance
Per ordering standard; typically +10/−0 mm for random mill length
mm
Straightness Tolerance
Typically ≤ 1–3 mm/m per applicable standard
mm/m
End Condition
Saw cut (standard); other end conditions to order
-
Surface Finish
Hot-rolled/forged black bar, turned, or cold-drawn bright bar
-
Out-of-Roundness
Per applicable dimensional standard for the ordered finish class
mm
Ovality
Per applicable dimensional standard for the ordered finish class
mm
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Duplex 2205 Round Bar
Pricing for Duplex Stainless Steel 2205 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
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Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
What is 2205 Duplex Stainless Steel and Why Should I Use It?
How Much Does 2205 Duplex Stainless Round Bar Cost?
Where Can I Buy 2205 Duplex Stainless Steel Round Bar? How to Find Quality Suppliers
What Size Round Bars Are Available in 2205 Duplex?
How Much Weight Does 2205 Duplex Round Bar Have per Foot?
What's the Tensile Strength of 2205 Duplex Stainless Steel?
Is 2205 Duplex Stainless Magnetic?
What Certifications Should 2205 Duplex Stainless Have?
What's the Minimum Order Quantity for 2205 Round Bar?
What's the Best Temperature Range for 2205 Duplex Stainless?
How to Request a Custom Size in 2205 Duplex Round Bar
What's PREN and Why Does It Matter for 2205 Duplex?
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