F51 / F53 Duplex & Super Duplex Manufacturer & Supplier
Duplex and super duplex fittings and flanges for chloride service: roughly double the yield of 316 and far better stress corrosion resistance. The forming and annealing window is narrow because the ferrite-austenite balance has to survive it.
UNS: ASTM A182 F51 / F53 / A815 WP S31803 | Category: Duplex Fittings & Flanges
Size Range
Outer Diameter: NPS 1/2 to 36 · SCH 10S to SCH 80S · Class 150 to Class 1500
Chemical Composition (%)
| Cr | Ni | Mo | N |
|---|---|---|---|
| 21.0-23.0 (F51) / 24.0-26.0 (F53) | 4.50-6.50 / 6.00-8.00 | 2.50-3.50 / 3.00-5.00 | 0.08-0.20 / 0.24-0.32 |
Mechanical Properties
- Tensile Strength
- 620 MPa min (F51), 800 MPa min (F53)
- Yield Strength
- 450 MPa min / 550 MPa min
- Elongation
- 25% min
- Hardness
- 293 HBW max
Applicable Standards
- ASTM A815
- ASTM A182
- NORSOK M-650
- ASTM A923
- EN 10204 3.1
Applications
- Subsea and topside seawater piping
- Desalination high pressure lines
- Chemical tanker cargo lines
- Produced water and injection systems
- Chloride-bearing process piping
Industries Served
- Oil & Gas
- Chemical & Petrochemical
- Marine & Shipbuilding
- Water & Desalination
- Power & Energy
- Defence
Equivalent Grades
- ASTM A182 F51
- ASTM A182 F51
- ASTM A182 F53
- ASTM A182 F53
- UNS S31803
- UNS S31803
- UNS S32205
- UNS S32205
- UNS S32750
- UNS S32750
- 1.4462
- 1.4462