F51 (2205) Duplex Stainless Steel
UNS S31803 | UNS S32205 | ASTM A182 F51 | ASTM A276/A479 | ASTM A240 | NACE MR0175F51 (2205) Duplex Stainless Steel
F51 (also known as 2205) Duplex is an austenitic-ferritic (duplex) stainless steel. Consisting of 22% Chromium and 5% Ni. 2205 duplex is typically dual certified to UNS S31803 (318) / S32205 (2205). 2205 combines corrosion resistance and higher strength compared other austenitic stainless steels, while also having superior pitting resistance. It is also suitable in applications in environments of -50°F to +600°F temperature range. F51 duplex does suffer from embrittlement and loss of toughness, when exposed to prolonged use in applications or environments below -50°F or above +600°F, this is why duplex is not suitable for exposure outside of these ranges.
Common industry/applications are: Pressure Vessels, Chemical and Biofluid processing, Rotors, Fans, and Shafts, and Pulp and Paper Processing.
Product forms include round bar, plate & sheet, and forgings.
Standards
- UNS S31803
- UNS S32205
- ASTM A182 F51
- ASTM A276/A479
- ASTM A240
- NACE MR0175
Characteristics
- For use in -50F to +600F temperatures.
- Excellent corrosion & pitting resistance.
- Good cryogenic (-50F) impact strength
Physical Properties
- Density: 0.281LB/in³ (7.80g/cm³)
- Melting Point: 2570–2660°F (1410–1460°C)
- Modulus of Elasticity: 29.0x10⁶psi (200 GPa)
- Magnetic Permeability: less than 1.05 @ 68°F (20°C)
Chemical Composition
PREN: Pitting Resistance Equivalent Number: An Equation to correlate pitting resistances of product, based on chemistry. This equation is: Cr + (3.3 x Mo) + (16 x N) – PREN = less than40
C
Mn
S
P
Si
Cr
Ni
Mo
N
Mechanical Properties: Wrought & Forged Bars
Typical mechanical properties, actual minimums may vary based on processing.
KSI (MPa)
(Cold Drawn)
KSI (MPa)
KSI (MPa)
(Cold Drawn)
KSI (MPa)
HRC (BHN)
Specialty Steel Supply makes all reasonable efforts to ensure the accuracy and correctness of the data found on this website and the associated documents but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
Stainless and Alloys
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Specialty Steel Supply Inc. is one of the largest distributors of austenitic, precipitation hardened, duplex and martensitic stainless steels. We have a wide range of products and types of stainless steel round bar and our well trained staff offers many years of experience in all aspects of the steel industry. Our ability to procure and source metals from all parts of the world allows us to stay competitive in a global marketplace. We are committed to developing and servicing just in time inventory programs.
Specialty Steel Supply
19201 Circle Lake Drive
Pinehurst, Texas 77362
info@specialtysteelsupply.com
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