Duplex Steel UNS S32205 (F60) Round Bar

Duplex Steel UNS S32205 (F60) Round Bar & Rod Supplier in India

Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier based in Mumbai, India. We supply duplex S32205 round bar/ F60 round bar with EN 10204 3.1 mill test certificates on every shipment and NACE MR0175 compliant inventory.

UNS S32205 (ASTM A182 F60 / W.Nr. 1.4462) is the industry’s most widely specified duplex grade, engineered with tighter chemistry controls than its predecessor S31803 to guarantee a PREN ≈ 35 and reliable performance in aggressive chloride and sour-gas environments. The microstructure of S32205 has two phases: about 50% austenite and 50% ferrite. This gives it a yield strength above 448 MPa (65 ksi), which is about twice that of 316L stainless steel. It also has a minimum tensile strength of 655 MPa (95 ksi), 25% elongation, and a maximum hardness of 293 HBW, according to ASTM A276. S32205 tightens the nitrogen (0.14-0.20%) and chromium (22.0-23.0%) ranges of S31803, eliminating borderline heats that underperform in aggressive service.

Our duplex 2205 round bar is available in diameters from 6 mm to 350 mm, hot rolled and cold drawn, with service temperature from -50°C to +300°C. All bars ship in solution-annealed condition with ferrite content verified at 40-60%. Specifications include ASTM A276, A479, ASME SA276/SA479 for bar, and ASTM A182 Grade F60 for forged bar. Major users include the oil and gas, chemical, marine, desalination, pulp and paper, and water treatment industries. Also known as Duplex 2205, DSS S32205, SAF 2205, and X2CrNiMoN22-5-3.

Duplex S32205 Bar Specifications

Duplex S32205 (F60) round bar specifications, including standards, dimensions, finishes, and conditions, are covered in the table below:

Standards	ASTM A276, A479, ASME SA276, SA479, A182 F60
Forms	Round, Hex, Flat, Square, Forged Bar
Diameter	6 mm – 350 mm
Length	1000 – 6000 mm, custom cut
Condition	Solution Annealed (1020-1100°C, water quench)
Finish	Black, Bright, Rough Turned, Centreless Ground, Peeled, Polished

Chemical Composition of Duplex UNS S32205 Bar

The S32205 chemical composition per ASTM A276 features tighter limits on chromium, molybdenum, and nitrogen versus S31803.

Property	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulphur (S)	Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)	Nitrogen (N)	Iron (Fe)
S32205 (wt%)	≤0.030	≤1.0	≤2.0	≤0.030	≤0.020	22.0-23.0	4.5-6.5	3.0-3.5	0.14-0.20	Balance
S31803 (wt%)	≤0.030	≤1.0	≤2.0	≤0.030	≤0.020	21.0-23.0	4.5-6.5	2.5-3.5	0.08-0.20	Balance

PREN = %Cr + 3.3 × %Mo + 16 × %N. S32205 minimum PREN: 34.14. Typical: ~35.8. S31803 minimum PREN: 30.53.

Mechanical Properties of ASTM A276 S32205 Bar

The Duplex Steel UNS S32205 Bar mechanical properties in the solution-annealed condition per ASTM A276:

Tensile Strength (min)	Yield Strength 0.2% Offset (min)	Yield Strength 1.0% Offset (min)	Elongation in 2 in. (min)	Hardness (max)
655 MPa (95 ksi)	450 MPa (65 ksi)	500 MPa (73 ksi)	25%	293 HBW / 31 HRC

S32205 yield is 2.6× that of 316L, enabling wall-thickness reduction in pressure vessels.

Physical Properties of S32205 Duplex Stainless Steel

Physical properties of S32205 influence machining and thermal design for bar stock. Its melting range can be approximately 1420-1465 °C.

Property	Density	Melting Range	Thermal Conductivity (20°C)	Specific Heat (20°C)	Electrical Resistivity (20°C)	Thermal Expansion (30-100°C)	Elastic Modulus (20°C)	Magnetic Permeability
Value	7.8	1420-1465	19	480	0.85	13.0 × 10⁻⁶	190	Ferromagnetic (due to ferrite)
Unit	g/cm³	°C	W/m·K	J/kg·K	µΩ·m	/°C	GPa	–

Duplex Stainless Steel (DSS) S32205 Equivalent Grades

F60 has its standard designation as S32205 and Werkstoff Nr. as 1.4462. Its other equivalent designations are:

UNS	Werkstoff Nr.	EN	AFNOR	JIS
S32205	1.4462	X2CrNiMoN22-5-3	Z2CND22-05-03	SUS 329J3

S32205 can be dual-certified to S31803 (F51). S31803 cannot be re-certified as S32205 without meeting the stricter chemistry.

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Available Forms of Duplex Stainless Steel UNS S32205 Bar & Rod

Duplex S32205 / F60 bar stock is available in forms for structural, rotating-equipment, and fastener applications.

Duplex F60 Round Bar

DSS UNS S32205 Hex Bar

Duplex S32205 Square Bar

Duplex Steel 2205 Flat Bar

DSS S32205 Forged Bar

Duplex Steel S32205 Bright Bar

Duplex UNS S32205 Rectangular Bar

Hot Forming, Welding & Machining of Duplex S31803 Bar

Solution anneal at 1020-1100°C (same as hot form) with rapid water quench after all hot work to restore phase balance. Stress relieving is not recommended due to sigma phase risk at 600-900°C. Weld with ER2209 filler (AWS A5.9). No preheating needed. Interpass max 150°C. PWHT is not required for most applications. Machining of this alloy requires rigid setups and lower speeds compared to 316L stainless steel due to its higher yield strength.

Industries of Duplex Steel UNS S31803 Round Bar

Duplex S31803 / F51 bar stock is specified where chloride stress corrosion cracking, high mechanical loads, and sour-gas environments require performance beyond standard austenitics. 17-4PH round bars are used in the following 6 key industries and applications:

Subsea valve stems, manifold components, downhole tool shafts, NACE MR0175-compliant fasteners, and Christmas tree hardware.
In chloride-bearing process streams, the following bolts are of interest: those used with heat exchanger baffle assemblies, reactor vessel studs, pump shafts, and agitator shafts.
Propeller shafts, rudder pins, seawater pump shafts, and desalination plant hardware.
Digester hardware, bleach washer shaft fasteners, and chip pre-steaming vessel fasteners.
Fasteners for FGD scrubber shafts, cooling water pump components, and flue gas ductwork are of interest.
Structural fasteners for coastal bridges, reinforcement dowels in chloride-exposed concrete, and anchor bolts for marine structures.

How to Order Duplex Steel UNS S31803 Round Bar from Nicorex Alloys

To place an order for Duplex UNS S31803 round bars, the following 8 details must be specified:

Product form (round, hex, flat, square, forged bar)
Specification ASTM A276/A479 or A182 F51
Diameter, tolerance (H9–H12), and length
Condition solution annealed
Surface finish and quantity
Testing ASTM A923, Charpy impact, NACE compliance
Documentation EN 10204 3.1 MTC, ferrite count (40–60%)
Confirm if S32205 dual certification is required

Frequently Asked Questions

What is the Difference Between S31803 (F51) and S32205 (F60)?

S32205 is a tighter-chemistry version of S31803 with higher minimum Cr (22.0%), Mo (3.0%), and N (0.14%), resulting in a guaranteed PREN ≈ 35 versus ~30.5 for S31803. S32205 can be dual-certified to S31803, but not vice versa.

Can S31803 Bar be Used above 300°C?

Longer exposure above 300°C makes material susceptible to the formation of sigma phases and intermetallics, which can reduce both the robustness and the corrosion resistance of the material. For service above 300°C, using austenitic or nickel alloy alternatives.

Is Duplex S31803 Bar Magnetic?

Yes. The ferrite phase (approximately 50%) makes S31803 partially magnetic, distinguishing it from fully austenitic grades like 316L and 904L.

What Filler Metal is Recommended for Welding S31803 Bar?

ER2209 (AWS A5.9) or E2209 (AWS A5.4) matching duplex fillers are standard. These over-alloyed fillers provide sufficient austenite formation in the weld metal.

Can S31803 Round Bar be Cold Drawn for Tighter Tolerances?

Duplex S31803 round bar ranges from ₹450 to ₹900 per kg depending on diameter, finish, and mill origin. Forged F51 bar carries a 20–30% premium.

What is the Price of Duplex S31803 / F51 Round Bar per kg in India?

Yes. Cold-drawn S31803 bar is available in H9, H10, and H11 tolerances with bright or centreless-ground finish. Cold drawing increases yield above the annealed minimum but must stay within 293 HBW max.