2205 Duplex Stainless Steel Round Bar
Grade: 2205/S32205 /S31803
Size:
Cold drawn: φ4mm-φ60mm
Hot Rolled: φ16mm-φ230mm
Forged: φ230mm-φ1200mm
Surface Finish: Black Annealed, Polished Bright, Centerless Grinding
Diameter Tolerance: H9, H11, h9, h11 etc
- Fast Shipping / Ready Stock
- ISO 9001 Direct Factory
- Custom Cutting & Processing
- 100% MTC & SGS Inspection Supported
2205 duplex stainless steel is one of the most widely used duplex stainless steel grades, designated as UNS S32205 and UNS S31803. It combines the advantages of both austenitic and ferritic stainless steels by having a dual-phase microstructure consisting of approximately equal proportions of austenite and ferrite. This unique structure provides an excellent combination of high strength, superior corrosion resistance, and good toughness.
The alloy contains approximately 22% chromium, 5% nickel, and 3% molybdenum, with controlled nitrogen addition. Chromium provides excellent resistance to general corrosion and oxidation, while molybdenum and nitrogen significantly improve resistance to pitting and crevice corrosion, especially in chloride-containing environments. The duplex structure provides significantly higher yield strength than conventional austenitic stainless steels such as 304 and 316.
2205 duplex stainless steel bars offer excellent resistance to stress corrosion cracking, chloride-induced corrosion, and erosion corrosion. Compared with 316L stainless steel, 2205 provides higher mechanical strength and improved resistance to localized corrosion while often allowing reduced material thickness in engineering applications. The nitrogen content enhances phase balance, strength, and corrosion resistance.
2205 stainless steel bars are normally supplied in solution annealed condition to maintain the optimal balance between ferrite and austenite phases. The material has good weldability when proper procedures are followed, although heat input control is important to maintain the required duplex microstructure.
Due to its high strength, excellent corrosion resistance, and cost efficiency, 2205 duplex stainless steel bars are widely used in oil and gas equipment, chemical processing systems, marine structures, pressure vessels, heat exchangers, desalination plants, pulp and paper equipment, and industrial piping systems.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S32205/S31803 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S32205/S31803 | Stainless Steel Bars for Pressure Equipment |
| ASTM | ASTM A182 – UNS S32205/S31803 | Forged Stainless Steel Fittings and Components |
| UNS | S32205 / S31803 | 2205 Duplex Stainless Steel Grade |
| JIS | JIS G4303 SUS329J3L | Duplex Stainless Steel Bars |
| EN | EN 10088-3 1.4462 | X2CrNiMoN22-5-3 Stainless Steel |
| DIN | DIN 1.4462 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Solution Annealing |
| Solution Treatment Temperature | Approximately 1020–1100°C followed by rapid cooling |
| Microstructure | Approximately 50% Ferrite + 50% Austenite |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A479 |
| Inspection | Chemical Analysis, Mechanical Testing, Ferrite Content Testing, Dimensional Inspection |
| Supply Condition | Solution Annealed Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Chromium (Cr) | 22.00 – 23.00 |
| Nickel (Ni) | 4.50 – 6.50 |
| Molybdenum (Mo) | 3.00 – 3.50 |
| Nitrogen (N) | 0.14 – 0.20 |
| Iron (Fe) | Balance |
Mechanical Properties
Solution Annealed Condition
| Property | Requirement |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength (0.2% Offset) | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 293 HB |
| Impact Toughness | Excellent at Low Temperature |
| Ferrite Content | Typically 35–65% |
| Industry | Applications |
| Oil & Gas Industry | Offshore platforms, pipelines, separators, valves |
| Chemical Industry | Reactors, storage tanks, heat exchangers |
| Marine Industry | Marine shafts, seawater equipment, structural components |
| Desalination Industry | Reverse osmosis equipment, seawater systems |
| Pulp & Paper Industry | Digesters, bleaching equipment, piping systems |
| Power Generation | Cooling systems, pressure equipment |
| Food & Pharmaceutical Industry | Hygienic processing equipment |
2205 duplex stainless steel is one of the most widely used duplex stainless steel grades, designated as UNS S32205 and UNS S31803. It combines the advantages of both austenitic and ferritic stainless steels by having a dual-phase microstructure consisting of approximately equal proportions of austenite and ferrite. This unique structure provides an excellent combination of high strength, superior corrosion resistance, and good toughness.
The alloy contains approximately 22% chromium, 5% nickel, and 3% molybdenum, with controlled nitrogen addition. Chromium provides excellent resistance to general corrosion and oxidation, while molybdenum and nitrogen significantly improve resistance to pitting and crevice corrosion, especially in chloride-containing environments. The duplex structure provides significantly higher yield strength than conventional austenitic stainless steels such as 304 and 316.
2205 duplex stainless steel bars offer excellent resistance to stress corrosion cracking, chloride-induced corrosion, and erosion corrosion. Compared with 316L stainless steel, 2205 provides higher mechanical strength and improved resistance to localized corrosion while often allowing reduced material thickness in engineering applications. The nitrogen content enhances phase balance, strength, and corrosion resistance.
2205 stainless steel bars are normally supplied in solution annealed condition to maintain the optimal balance between ferrite and austenite phases. The material has good weldability when proper procedures are followed, although heat input control is important to maintain the required duplex microstructure.
Due to its high strength, excellent corrosion resistance, and cost efficiency, 2205 duplex stainless steel bars are widely used in oil and gas equipment, chemical processing systems, marine structures, pressure vessels, heat exchangers, desalination plants, pulp and paper equipment, and industrial piping systems.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S32205/S31803 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S32205/S31803 | Stainless Steel Bars for Pressure Equipment |
| ASTM | ASTM A182 – UNS S32205/S31803 | Forged Stainless Steel Fittings and Components |
| UNS | S32205 / S31803 | 2205 Duplex Stainless Steel Grade |
| JIS | JIS G4303 SUS329J3L | Duplex Stainless Steel Bars |
| EN | EN 10088-3 1.4462 | X2CrNiMoN22-5-3 Stainless Steel |
| DIN | DIN 1.4462 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Solution Annealing |
| Solution Treatment Temperature | Approximately 1020–1100°C followed by rapid cooling |
| Microstructure | Approximately 50% Ferrite + 50% Austenite |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A479 |
| Inspection | Chemical Analysis, Mechanical Testing, Ferrite Content Testing, Dimensional Inspection |
| Supply Condition | Solution Annealed Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Chromium (Cr) | 22.00 – 23.00 |
| Nickel (Ni) | 4.50 – 6.50 |
| Molybdenum (Mo) | 3.00 – 3.50 |
| Nitrogen (N) | 0.14 – 0.20 |
| Iron (Fe) | Balance |
Mechanical Properties
Solution Annealed Condition
| Property | Requirement |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength (0.2% Offset) | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 293 HB |
| Impact Toughness | Excellent at Low Temperature |
| Ferrite Content | Typically 35–65% |
| Industry | Applications |
| Oil & Gas Industry | Offshore platforms, pipelines, separators, valves |
| Chemical Industry | Reactors, storage tanks, heat exchangers |
| Marine Industry | Marine shafts, seawater equipment, structural components |
| Desalination Industry | Reverse osmosis equipment, seawater systems |
| Pulp & Paper Industry | Digesters, bleaching equipment, piping systems |
| Power Generation | Cooling systems, pressure equipment |
| Food & Pharmaceutical Industry | Hygienic processing equipment |
