Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASTM A1082/A1082M Grade S32205 | Duplex 2205 Stainless Steel
Enhanced duplex stainless steel for maximum corrosion resistance and durability
Grade S32205 (UNS S32205) is the nitrogen-enhanced version of standard Duplex 2205 stainless steel, offering even greater resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chloride environments. Designated as ASTM A1082/A1082M F60, this grade features a dual-phase microstructure that balances high mechanical strength—nearly double that of standard austenitic grades—with exceptional durability. With its 22% chromium, 3% molybdenum, and 5-6% nickel composition, S32205 is the industry standard for oil and gas production, marine applications, chemical processing, and pulp and paper industries. Its superior fatigue strength and thermal conductivity make it an ideal choice for high-pressure vessels, complex piping systems, and structural components operating in harsh industrial conditions.
ASTM A1082/A1082M Grade S32205 Chemical RequirementsA
| Grades | UNS Designation | Type | C | Mn | P | S | Si | Cr | Ni | Mo | N | Other ElementsB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A1082/A1082M Duplex (Ferritic-Austenitic) Grades | S32205 | 2205 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | . . . |
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ASTM A1082/A1082M Grade S32205 Mechanical Properties
| UNS Designation | Solution Temperature, °F [°C] (B, C) | Tensile Strength, min, ksi [MPa] | Yield Strength, 0.2% offset, min, ksi [MPa] | Elongation in 2" [50 mm] or 4D, min, % | Rockwell HRC, max | Brinell max (D) |
|---|---|---|---|---|---|---|
| S32205 | 1900 [1040] | 95 [655] | 65 [450] | 25 | 30 | 290 |
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ASTM A1082/A1082M Markings
| UNS Designation | Type | Grade Symbol |
|---|---|---|
| S32205 | 2205 | TB 32205 |
Frequently Asked Questions
What is Duplex 2205 (S32205)?
Duplex 2205 (S32205) is a stainless steel grade covered under ASTM A1082/A1082M for high-strength bolting in special-purpose applications such as pressure vessels. UNS designation S32205. Available as bolts, studs, screws and nuts manufactured by TorqBolt for global oil/gas/nuclear/power/marine sectors.
What are the mechanical properties of Duplex 2205 (S32205) per ASTM A1082?
Mechanical property requirements for S32205 are defined in ASTM A1082 Table 2 (PH grade solution treatment) or Table 4 (duplex annealed condition). Properties vary by treatment condition - refer to the bolting specification for the H-condition (PH) or annealed yield/tensile/elongation/hardness requirements applicable to your order.
Is Duplex 2205 (S32205) suitable for sour service (NACE MR0175)?
Refer to NACE MR0175 / ISO 15156 Tables A.16-A.19. Most A1082 duplex grades are permitted at ≤28 HRC; PH grades require condition-specific qualification (typically H1150 for 17-4 PH at 28 HRC). TorqBolt supplies sour-service certified product on request with full PMI + hardness traceability.
What ASME / ISO dimensional standards can Duplex 2205 (S32205) be supplied to?
This grade is available across the full ASME and ISO bolting dimensional standards covered on this site - ASME B18.2.1 (hex bolts, hex cap screws, lag screws), B18.2.2 (hex nuts, square nuts, lock nuts), B18.3 (socket head cap screws), B18.31.2 (clamping studs), B16.5 (flange stud bolts), ISO 4032 / 4033 / 4035 (metric nuts), and metric B18.2.3.xM / B18.2.4.xM series.
References & Standards
- ASTM A1082 / A1082M - Standard Specification for High-Strength Precipitation-Hardening and Duplex Stainless Steel Bolting for Special-Purpose Applications (current edition 2016, active)
- ASTM A962 / A962M - General Requirements for Special-Purpose Bolting Materials
- ASTM A370 - Mechanical Testing of Steel Products
- NACE MR0175 / ISO 15156 - Sour-service hardness limits for petroleum & natural gas industries
- ASME B18 series - Dimensional standards for bolts, screws, nuts, studs
- ISO 4032 / 4033 / 4035 - Metric hexagon nut dimensional standards
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