ASTM A240 Type 2205 Stainless Steel Sheet & Plate
What is ASTM A240 Type 2205 Stainless Steel Sheet and Plate?
As a professional stainless steel supplier, SHH STEEL is pleased to present ASTM A240 Type 2205 Stainless Steel Sheet and Plate. Also known as Duplex 2205, UNS S32205 (preferred) or UNS S31803, this grade is a nitrogen-enhanced duplex stainless steel with a balanced austenitic-ferritic microstructure.
Type 2205 combines high chromium (22–23%), molybdenum (3.0–3.5%) and nitrogen (0.14–0.20%) to deliver outstanding resistance to pitting, crevice corrosion and chloride-induced stress corrosion cracking, while providing approximately twice the yield strength of standard austenitic grades such as 316L. SHH STEEL supplies ASTM A240 Type 2205 in both sheet and plate forms, covering thicknesses from 0.5 mm to 80 mm (thicker plates available on request), with widths up to 2000–2500 mm and lengths up to 12000 mm. Custom sizes and surface finishes are available.
The material is typically delivered in the solution-annealed condition with full Mill Test Certificates (EN 10204 3.1). Whether for thin sheet fabrication or heavy plate applications, SHH STEEL provides consistent quality for chemical processing, oil & gas, marine and industrial projects worldwide.
ASTM A240 Type 2205 Material Specification
ASTM A240 Type 2205 stainless steel sheet and plate are manufactured in accordance with ASTM A240/A240M and ASME SA-240. Modern production preferentially follows the tighter chemistry of UNS S32205, which also satisfies the requirements of UNS S31803.
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | ASTM A240 / ASME SA-240 Type 2205 | Full compliance |
| UNS Designation | S32205 (preferred) / S31803 | Confirmed |
| Product Form | Sheet and Plate | Both available |
| Thickness Range | 0.5 mm – 80 mm (thicker available) | Custom sizes available |
| Width / Length | Up to 2000–2500 mm / 12000 mm | Custom fabrication supported |
| Surface Finish | 2B, No.1, BA, HL | Multiple options |
| Heat Treatment Condition | Solution Annealed | Standard supply condition |
| Certification | EN 10204 3.1 / 3.2 | Available |
Chemical Composition
The chemical composition of ASTM A240 Type 2205 (UNS S32205) is optimized for high pitting resistance (PREN typically ≥ 35) and balanced duplex microstructure.
| Element | Content (%) | Standard Limit (S32205) | Role |
|---|---|---|---|
| Carbon (C) | ≤ 0.030 | 0.030 max | Low carbon for good weldability |
| Manganese (Mn) | ≤ 2.00 | 2.00 max | Deoxidation |
| Silicon (Si) | ≤ 1.00 | 1.00 max | Deoxidation |
| Phosphorus (P) | ≤ 0.030 | 0.030 max | Impurity control |
| Sulfur (S) | ≤ 0.020 | 0.020 max | Cleanliness |
| Chromium (Cr) | 22.0 – 23.0 | 22.0 – 23.0 | Corrosion resistance and ferrite balance |
| Nickel (Ni) | 4.5 – 6.5 | 4.5 – 6.5 | Austenite stability |
| Molybdenum (Mo) | 3.0 – 3.5 | 3.0 – 3.5 | Pitting and crevice corrosion resistance |
| Nitrogen (N) | 0.14 – 0.20 | 0.14 – 0.20 | Strength and pitting resistance |
Mechanical Properties
In the solution-annealed condition, ASTM A240 Type 2205 offers significantly higher strength than austenitic grades such as 316L.
| Property | Value | Test Method |
|---|---|---|
| Tensile Strength | ≥ 655 MPa (95 ksi) | ASTM A370 |
| Yield Strength (0.2% Offset) | ≥ 450 MPa (65 ksi) | ASTM A370 |
| Elongation in 50 mm | ≥ 25% | ASTM A370 |
| Hardness | ≤ 293 HB / ≤ 31 HRC | ASTM E10/E18 |
| Density | 7.98 g/cm³ | — |
Delivery Conditions
Delivery Conditions
SHH STEEL supplies ASTM A240 Type 2205 primarily in the solution-annealed and pickled condition. Detailed capabilities by surface finish are as follows:
2B Finish (Cold-rolled, annealed, pickled and skin-passed)
- Typical thickness range: 0.5 mm – 6.0 mm
- Maximum width: up to 1500–2000 mm depending on thickness
- Preferred for applications requiring a smooth surface and good flatness.
No.1 Finish (Hot-rolled, annealed and pickled)
- Typical thickness range: 3.0 mm – 80 mm (thicker plates available)
- Maximum width: up to 2000–2500 mm
- Standard finish for heavy plates used in chemical, oil & gas and marine equipment.
Other Finishes
- BA (Bright Annealed) and HL (Hairline) available on request in limited thickness ranges.
Protective PVC film can be applied on one or both sides. Precision cutting (plasma, laser or waterjet) and closer dimensional tolerances are available upon request.
Tolerances
Dimensional tolerances for ASTM A240 Type 2205 sheet and plate follow ASTM A480/A480M.
- Thickness tolerances vary by product form and thickness.
- Width tolerance is typically +6 mm / 0 mm.
- Length tolerance for cut-to-length material is normally +10 mm / 0 mm.
- Flatness is controlled according to ASTM A480; improved flatness can be supplied for precision fabrication.
- Edge conditions include mill edge, slit edge, sheared edge or plasma/laser cut edge according to customer preference.
Tighter tolerances can be arranged for special projects.
Weldability
ASTM A240 Type 2205 offers good weldability when proper procedures are followed. It can be welded by GTAW (TIG), GMAW (MIG), SMAW and plasma processes. Matching or overalloyed filler metals such as ER2209 are recommended to maintain the balanced duplex microstructure and corrosion resistance in the weld metal.
Heat input should be controlled (typically 0.5–2.5 kJ/mm) and interpass temperature kept below 150°C to avoid excessive ferrite or intermetallic phases. Preheating is generally not required. Post-weld heat treatment is normally not necessary, but proper cleaning and passivation after welding are recommended to restore full corrosion resistance.
Equivalent Material Grades
GradeStandardDesignationType 2205ASTM A240 / ASME SA-240—UNS S32205Unified Numbering SystemPreferred modern designationUNS S31803Unified Numbering SystemOlder designation1.4462EN 10088 / EN 10028-7X2CrNiMoN22-5-3SUS329J3LJIS—022Cr22Ni5Mo3NGB/T 20878 / GB/T 4237Chinese National StandardSS 2377Swedish Standard—
Applications
ASTM A240 Type 2205 is widely used where high strength and superior resistance to chloride environments are required. Typical applications are shown below with relevant keywords:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Oil & Gas | Piping, heat exchangers, separators, manifolds – A240 2205 Oil Gas |
| Chemical Processing | Reactors, tanks, process equipment – A240 2205 Chemical Processing |
| Marine & Offshore | Seawater systems, desalination, offshore platforms – A240 2205 Marine |
| Pulp & Paper | Digesters, bleach plants, recovery equipment – A240 2205 Pulp Paper |
| Pollution Control / FGD | Scrubbers, absorbers, ducting – A240 2205 FGD |
| Pressure Vessels & Heat Exchangers | High-strength vessels and exchangers – A240 2205 Pressure Vessel |
| General Industrial | Structural components in corrosive environments – A240 2205 Industrial |
SHH STEEL – China mill-Direct Supply | Mill Direct Exporter
SHH STEEL maintains long-term strategic cooperation with major Chinese stainless steel mills and acts as a first-level (primary) agent for these mills. This direct partnership enables us to offer competitive pricing advantages, faster delivery times and consistent quality assurance that many intermediate traders cannot match.
All ASTM A240 Type 2205 material is sourced from reputable Chinese mills under strict quality control, supplied with complete Mill Test Certificates, and supported by our professional export team. Customers benefit from reliable supply, short lead times, technical support and cost-effective solutions for oil & gas, chemical and marine applications worldwide.
FAQ
- What is the main advantage of 2205 compared with 316L?Type 2205 offers approximately twice the yield strength of 316L and significantly better resistance to chloride pitting, crevice corrosion and stress corrosion cracking due to its duplex microstructure and higher PREN.
- What is the difference between UNS S31803 and UNS S32205?UNS S32205 has tighter ranges for chromium, molybdenum and nitrogen, providing more consistent and generally better corrosion resistance. Most modern 2205 production meets S32205 chemistry (which also satisfies S31803).
- What are the equivalent grades of ASTM A240 Type 2205?Common equivalents include UNS S32205 / S31803, EN 1.4462 (X2CrNiMoN22-5-3), JIS SUS329J3L and Chinese 022Cr22Ni5Mo3N.
- What is the density of ASTM A240 Type 2205?Approximately 7.98 g/cm³.
- Is Type 2205 suitable for high-temperature service?Type 2205 is generally limited to continuous service below approximately 300°C to avoid embrittlement from intermetallic phases. It is not recommended for prolonged exposure above this temperature.
Conclusion
ASTM A240 Type 2205 Stainless Steel Sheet and Plate from SHH STEEL deliver high strength and outstanding resistance to chloride environments through a balanced duplex microstructure. With strict quality control, flexible sizing options, competitive pricing through direct mill partnerships and professional global export service, we provide trusted solutions for oil & gas, chemical processing, marine and industrial applications worldwide.
Contact SHH STEEL today for your ASTM A240 Type 2205 requirements.
ASTM A240 2205, ASTM A240 Type 2205, 2205 duplex stainless steel plate, 2205 stainless steel sheet, UNS S32205, UNS S31803, 1.4462, SUS329J3L, duplex 2205 plate
Quality Steel Needed? Inquire for Offers
Related Products
