Amid a North Sea oil rig's crisis, where 316L gaskets failed under high-pressure sour gas, causing leaks and halving uptime, engineers turned to Duplex 2205 Foil (UNS S31803/S32205) delivering double the yield strength (450+ MPa) and zero SCC incidents, boosting reliability for procurement heads in oil & gas.
Table of Contents:
Duplex 2205 foil, a ferritic-austenitic stainless with 22% Cr, 5-6% Ni, and 3% Mo (PREN 35+), crushes common austenitics like 316L in stress corrosion cracking (SCC) resistance, pitting, and fatigue ideal for chloride-rich brine, seawater, and acids where 316L pits rapidly. Yield strength twice that of 316L enables 30-50% thinner walls, cutting weight and costs in pressure vessels.
Aurico Alloys LLP, trusted Duplex 2205 foil supplier in Mumbai, stocks affordable, authentic UNS S31803 foil from India to abroad for chemical, oil & gas, marine, pharma, power, and hardware stores complete with EN 10204 3.1 MTC for NACE-compliant sour service.
As a Duplex 2205 shim stock manufacturer in Mumbai, we offer custom cut-to-size rolls for stamping high-fatigue diaphragms, supporting fabricators with ASTM A240 Duplex 2205 foil at competitive price per kg in India. Engineers value its thermal conductivity for petrochemical heat exchangers and weight reduction vs 316L in structural parts.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP – Duplex 2205 & 31803 Foil Stockist India to Abroad |
|---|---|
| Grade | Duplex 2205 (UNS S31803 / S32205) |
| Standards | ASTM A240 / A789, ASME SA240, EN 1.4462, NACE MR0175 |
| Thickness Range | 0.1mm – 0.5mm (thin foil), up to 6mm |
| Width/Length | Custom rolls, 100mm – 1500mm width |
| Finish | Annealed, bright, custom shim |
| Delivery | Stock dispatch, full MTC, export ready |
| Price | INR 800 – 1,500 per kg. Indicative USD 9 – 18 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | S32205 / S31803 |
| Werkstoff / EN number | 1.4462 |
| EN designation | X2CrNiMoN22-5-3 |
| Density | 7.80 g/cm3 |
| Melting range | 1430 °C |
| Specific heat (20 °C) | 460 J/kg·K |
| Thermal conductivity (20 °C) | 13.5 W/m·K |
| Coefficient of expansion (20–200 °C) | 14.0 µm/m·K |
| Coefficient of expansion (20–400 °C) | 14.5 µm/m·K (Thermal expansion 25% lower than 316L – comparable with carbon steel) |
| Electrical resistivity (20 °C) | 0.8 Ω·mm²/m |
| Young's modulus (20 °C) | 200 GPa |
| Magnetic | yes |
| Oil and gas conformance | NACE MR0175 / ISO 15156-3 · NACE MR0103 / ISO 17945 · Norsok M-630 MDS D55 (Aperam DX1803/DX2205 Technical Data Sheet) |
| Plate, sheet and strip specification | ASTM A240 |
Identifiers and physical constants for Duplex 2205. A dash means no such designation is published for this grade.
Stock & Product Availability
Verified Duplex 2205 foil stockholders in Maharashtra stock UNS S31803 foil for high-pressure oilfield gaskets and offshore separators global shipment for marine propulsion and energy needs.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | — | 0.030 |
| Manganese (Mn) | — | 1.80 |
| Phosphorus (P) | — | 0.030 |
| Sulfur (S) | — | 0.0007 |
| Silicon (Si) | — | 0.50 |
| Chromium (Cr) | 22.20 | 22.50 |
| Nickel (Ni) | 5.1 | 5.3 |
| Molybdenum (Mo) | 3.10 | 3.30 |
| Nitrogen (N) | 0.16 | 0.18 |
| Aluminium (Al) | — | 0.015 |
Composition limits for Duplex 2205. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
(S31803/S32205 ranges)Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 620–820 |
| Yield Strength, 0.2% (MPa) | ≥450 |
| Elongation (%) | ≥25 |
| Hardness (HB) | 210–290 |
| PREN | 30–38 |
| Impact Toughness (RT) | ≥100 J |
| Max Service Temp (°C) | Up to 300 |
Applications & Benefits
- Oil & Gas: Duplex 2205 foil supplier in Mumbai for high-pressure oilfield gaskets, sour gas service; Duplex vs 316L cuts wall thickness 30-50%.
- Chemical/Petrochem: UNS S32205 foil for petrochemical heat exchangers; UNS S31803 foil stockist for SCC-resistant liners.
- Marine & Desalination: Seawater-resistant Duplex 2205 foil for desalination evaporation chambers, ship cargo tanks; UNS S31803 foil for marine propulsion/subsea sensors.
- Pharma & Power: ASTM A240 UNS S31803 foil 0.1-0.5mm for coastal repairs, high-load fasteners.
- Fabrication: Thin gauge for precision springs/diaphragms; custom Duplex S32205 rolls for stamping.
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Duplex 2205 & 31803 foil (UNS S31803/S32205, ASTM A240) from Aurico Alloys LLP equips industries with high-strength, SCC-proof solutions that double performance over 316L proven in stats like 450 MPa yield and PREN 35+. Is your next project fortified with Duplex 2205 foil for unmatched durability?