Stainless Steel · Flanges · ASTM A182 F51
Duplex 2205 Stainless Steel Flanges
In short: Duplex 2205 flanges forged to ASTM A182 F51 (S31803) or F60 (S32205) are used across oil and gas, desalination and chemical piping.
- S32205
- UNS number
- 7.8
- density, g/cm³
- 3.1 / 3.2
- EN 10204 certificates
- 6
- Duplex 2205 product forms
Why this combination
Why Duplex 2205 in flanges
F51 and F60 are the duplex flange designations; check which your piping class names.
High strength gives duplex flanges a high pressure rating per ASME B16.5 material group.
Specification
How to specify Duplex 2205 flanges
NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request
- Specification
- ASTM A182 F51 (S31803) / F60 (S32205)
- UNS
- S32205 / S31803
- EN / W.Nr.
- 1.4462
- Dimensions
- ASME B16.5 / B16.47
Sizes and weights
Duplex 2205 flanges sizes, weighed at 7.8 g/cm³
Other sizes on request. For general flanges information, such as manufacturing routes and end finishes, see the flanges guide.
NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request
Chemistry
Duplex 2205 composition
- UNS
- S32205 / S31803
- EN / W.Nr.
- 1.4462 · X2CrNiMoN22-5-3
- Density
- 7.8 g/cm³
- PREN
- 34 – 35
| Element | Limit, % | Why it matters |
|---|---|---|
| C | 0.030 max | |
| Mn | 2.00 max | |
| P | 0.030 max | |
| S | 0.020 max | |
| Si | 1.00 max | |
| Cr | 22.0 – 23.0 | |
| Ni | 4.5 – 6.5 | |
| Mo | 3.0 – 3.5 | |
| N | 0.14 – 0.20 |
Limits per ASTM A240 (S32205); other product forms and specifications differ slightly. Your order's specification and edition govern.
Questions
About Duplex 2205 flanges
F51 or F60?
F51 is S31803; F60 is S32205. Dual certification is common.
Are NACE-compliant duplex flanges available?
Yes, with hardness testing.
From enquiry to dispatch
How a Duplex 2205 flanges order runs
- 01 EnquiryGrade, specification, size, quantity
- 02 ReviewChecked against your standard
- 03 InspectPMI, dimensions, TPI if required
- 04 CertifyEN 10204 3.1 / 3.2, heat traceable
- 05 ShipPacked and documented for the destination
Need Duplex 2205 flanges?
Send size, quantity, specification and destination. We reply with availability, certificates and delivery.