Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of Duplex 2205 Round Bar Manufacturer in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Duplex 2205 Round Bar Manufacturer
Dongmeng Group supplies Duplex 2205 stainless steel round bar for oil & gas, chemical processing, marine, pressure equipment, pulp and paper, water treatment and heavy-duty engineering applications.
2205 is an austenitic-ferritic duplex stainless steel combining high mechanical strength with strong resistance to chloride stress corrosion cracking, pitting and crevice corrosion.
Duplex 2205 Round Bar Specifications
| Item | Available Specification |
| Product | Duplex 2205 stainless steel round bar |
| UNS Grade | S32205 / S31803 |
| EN Grade | 1.4462 |
| EN Name | X2CrNiMoN22-5-3 |
| ASTM Standards | ASTM A276, ASTM A479 |
| ASME | SA-276, SA-479 |
| Diameter | 1.6–254 mm / 1⁄16"–10" |
| Length | 3 m, 6 m, 12 ft, 20 ft or cut-to-length |
| Production | Hot rolled, forged, cold finished, peeled or ground |
| Condition | Solution annealed and quenched |
| Surface | Black, pickled, peeled, turned, ground or polished |
| Processing | Saw cutting, CNC turning, drilling, grinding and polishing |
| Documentation | Mill Test Certificate / EN 10204 3.1 on request |
| Inspection | PMI, dimensional, hardness and mechanical testing |
| Packing | Bundles, protective wrapping, wooden boxes or seaworthy export packing |
Final dimensional availability and tolerance depend on diameter, manufacturing route and applicable product standard.
UNS S32205 vs S31803
Both UNS S31803 and S32205 are commonly referred to as Duplex 2205, but S32205 has tighter minimum chromium, molybdenum and nitrogen requirements intended to provide more consistent resistance to localized corrosion.
| Element | S31803 | S32205 |
| Carbon | ≤0.030% | ≤0.030% |
| Chromium | 21.0–23.0% | 22.0–23.0% |
| Nickel | 4.5–6.5% | 4.5–6.5% |
| Molybdenum | 2.5–3.5% | 3.0–3.5% |
| Nitrogen | 0.08–0.20% | 0.14–0.20% |
| Manganese | ≤2.00% | ≤2.00% |
| Silicon | ≤1.00% | ≤1.00% |
| Phosphorus | ≤0.030% | ≤0.030% |
| Sulfur | ≤0.020% | ≤0.020% |
For new projects where localized corrosion resistance is important, UNS S32205 is generally the preferred purchasing designation.
The typical 2205 chemistry is approximately 22% Cr, 5–6% Ni, 3% Mo and controlled nitrogen.
Mechanical Properties
Duplex 2205 provides significantly higher yield strength than conventional 304L and 316L austenitic stainless steels.
Typical or specification minimum values vary according to product standard, bar diameter and delivery condition.
| Property | Duplex 2205 Reference Value |
| 0.2% Yield Strength | ≥450 MPa |
| Tensile Strength | Approximately ≥620–655 MPa |
| Elongation | ≥25% |
| Hardness | Typically ≤28–31 HRC depending on specification |
| Density | Approx. 7.8 g/cm³ |
Alleima describes 2205 as having roughly twice the proof strength of standard austenitic stainless steels and reports 450 MPa minimum 0.2% proof strength for its solution-annealed bar product.
Important: Mechanical acceptance values should always be specified according to the applicable ASTM, ASME or EN standard and ordered product size rather than using generic datasheet values alone.
Why Duplex 2205?
High Strength
Duplex 2205 offers substantially higher yield strength than conventional 304/304L or 316/316L stainless steel.
This can provide design advantages for:
Shafts
Valve components
Pump components
Fasteners
High-load structural parts
Pressure equipment components
Excellent Chloride Resistance
2205 contains chromium, molybdenum and nitrogen, providing strong resistance to:
Chloride-induced pitting
Crevice corrosion
Stress corrosion cracking
General corrosion
Erosion corrosion
Corrosion fatigue
A commonly used comparison parameter is:
PREN = %Cr + 3.3 × %Mo + 16 × %N
Optimized S32205 compositions typically achieve a PRE value above 35, substantially higher than conventional 316L.
Good Weldability
2205 can be welded using common welding processes when suitable duplex filler materials, heat input and interpass temperature controls are applied.
Correct welding procedures are particularly important because the desired corrosion resistance and mechanical performance depend on maintaining an appropriate ferrite/austenite phase balance.
Duplex 2205 vs 316L
| Property | Duplex 2205 | 316L |
| Microstructure | Austenitic + Ferritic | Austenitic |
| Yield Strength | Much higher | Lower |
| Chloride SCC Resistance | Excellent | Moderate |
| Pitting Resistance | Higher | Moderate |
| Typical PREN | >35 for optimized 2205 | Approx. mid-20s |
| Nickel Content | Lower | Higher |
| Machinability | More demanding | Easier |
| Typical Use | Offshore, chemical, marine, oil & gas | General chemical, food, architectural |
2205 is particularly attractive when the project requires both high mechanical strength and improved resistance to chloride-containing environments.
Applicable Standards
ASTM A276
ASTM A276 covers hot-finished and cold-finished stainless steel bars, including round, square and hexagonal bars.
It is commonly specified for general engineering and corrosion-resistant stainless steel bar applications.
ASTM A479 / ASME SA-479
ASTM A479 covers hot- and cold-finished stainless steel bars and shapes intended for use in boilers and pressure vessels.
For pressure equipment, valve, flange and process-system components, buyers should clearly indicate whether A479 or ASME SA-479 compliance is required.
EN 10088-3
EN 10088-3 is widely used for stainless steel semi-finished products, bars, rods, wire, sections and bright products.
Duplex 2205 corresponds to:
EN 1.4462 / X2CrNiMoN22-5-3
Heat Treatment
Duplex 2205 is normally supplied in the solution-annealed and rapidly quenched condition.
A representative solution annealing range is approximately:
1020–1100°C / 1868–2012°F, followed by rapid water quenching.
Proper heat treatment helps maintain the required duplex microstructure and prevents undesirable intermetallic phases.
2205 should not be treated like a conventional precipitation-hardening or martensitic stainless steel.
Machining Duplex 2205 Round Bar
Because of its high strength and work-hardening behavior, Duplex 2205 generally requires more machining power than 304 or 316 stainless steel.
Recommended machining practices include:
Rigid machine setup
Sharp carbide tooling
Positive cutting geometry
Adequate cutting depth
Controlled cutting speed
High and consistent feed
Effective coolant supply
Avoiding unnecessary tool rubbing
For finished parts, Dongmeng Group can provide cut blanks or pre-machined material according to customer drawings.
Custom Processing
Available processing can include:
Precision Saw Cutting
Bars can be cut into fixed lengths or machining blanks.
Peeling and Turning
Used to remove scale and improve diameter consistency.
Centerless Grinding
Available where tighter dimensional tolerances and smoother surfaces are required.
Polishing
Suitable for exposed components or applications requiring improved surface appearance.
CNC Machining
Custom machining can be arranged according to technical drawings.
Pickling and Passivation
Surface cleaning and passivation can be specified after fabrication where required.
Quality Inspection
For industrial and project orders, inspection can include:
Material grade verification
Heat number traceability
Chemical composition verification
PMI testing
Diameter measurement
Length and straightness inspection
Surface inspection
Hardness testing
Mechanical property testing
Ultrasonic testing when specified
Ferrite / microstructure inspection when required
Third-party inspection
Documentation can be provided according to the purchase specification.
Typical Applications
Duplex 2205 round bar is commonly used for:
Oil and gas equipment
Offshore engineering
Marine components
Pump shafts
Valve stems
Valve components
Flange components
Fasteners
Pressure equipment
Heat exchanger components
Chemical processing equipment
Pulp and paper machinery
Desalination equipment
Water treatment systems
Mining equipment
High-load structural components
Its combination of strength and corrosion resistance makes 2205 particularly suitable for chloride-containing water, brackish water and demanding chemical-processing environments.
Why Choose Dongmeng Group?
Duplex Stainless Steel Supply
Dongmeng Group supplies Duplex 2205 round bar in multiple diameters, lengths and surface conditions for distributors, engineering companies, machining workshops and project contractors.
Custom Sizes
We support:
Metric dimensions
Imperial dimensions
Fixed-length cutting
Machining blanks
Custom surface conditions
Project-specific packaging
Material Traceability
Heat-number traceability and Mill Test Certificates can be supplied according to order requirements.
Inspection Support
PMI, dimensional testing, mechanical testing and buyer-appointed third-party inspection can be arranged when specified in the purchase order.
Export Packaging
Bars can be supplied in reinforced bundles, waterproof wrapping or wooden cases according to product dimensions and international shipping requirements.
How to Order Duplex 2205 Round Bar
For an accurate quotation, please provide:
Grade: S32205 or S31803
Standard: ASTM A276 / ASTM A479 / EN 10088-3
Diameter
Length
Required tolerance
Surface condition
Quantity
Heat treatment condition
Inspection requirements
Required certificates
Destination port or delivery address
Providing a drawing is recommended for machined or tight-tolerance components.
Frequently Asked Questions
Is Duplex 2205 the same as UNS S32205?
S32205 is one of the principal UNS designations for Duplex 2205. S31803 is also commonly called 2205, but S32205 has tighter minimum Cr, Mo and N requirements and is often preferred for modern project specifications.
Is 2205 stronger than 316L?
Yes. Duplex 2205 has substantially higher yield strength than standard 316L and is often selected where both strength and chloride corrosion resistance are important.
Is Duplex 2205 suitable for marine applications?
2205 has better pitting, crevice corrosion and chloride stress corrosion cracking resistance than 316L in many environments. Actual suitability must still consider seawater temperature, chloride concentration, crevices, oxygen level and design conditions.
Can Duplex 2205 round bar be machined?
Yes. It can be turned, drilled, milled and ground, but machining requires greater rigidity and cutting force than conventional austenitic stainless steels.
Can you provide ASTM A479 2205 round bar?
Yes. ASTM A479 / ASME SA-479 material can be supplied subject to the required diameter, quantity and project specification.
Can you provide EN 10204 3.1 certificates?
EN 10204 3.1 Mill Test Certificates can be specified during quotation and purchasing.
Can you cut bars into short machining blanks?
Yes. Fixed-length saw cutting and custom machining blanks can be supplied according to customer drawings or cutting lists.
Request a Quote
Looking for a reliable Duplex 2205 round bar manufacturer and supplier?
Send your material specification, drawing or purchasing list to Dongmeng Group.
Dongmeng Group
Email: office@dongmjd.com
Phone / WhatsApp: +86 157 6921 4734
Website: www.cndmmetal.com
Include the grade, standard, diameter, length, quantity and destination to receive an accurate quotation.
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