Duplex Stainless Steel Alloy 2205 Fasteners & Bolting

Standard Duplex Stainless Steel (UNS S32205 / S31803 / 1.4462)

Duplex Stainless Steel Alloy 2205 Fasteners

Buy Alloy 2205 (UNS S32205 / UNS S31803 / EN 1.4462 / F51 / F60) bolts, studs, nuts, and engineered fasteners from Exotic Alloy, manufactured in strict compliance with ASTM A1082, ASTM A276, ASTM A479, and NACE MR0175 / ISO 15156. Alloy 2205 is the most widely utilized duplex stainless steel in the world, providing twice the yield strength of austenitic 316L combined with exceptional resistance to pitting, crevice corrosion, and chloride stress corrosion cracking (PREN ≥ 34-36).

Exotic Alloy produces Alloy 2205 heavy hex bolts, socket cap screws, all-thread stud bolts, and custom CNC components in metric (M4 to M100) and imperial (1/4" to 4") dimensions. It is the premier alloy for offshore marine environments, oil & gas subsea production systems, chemical processing, and desalination installations.

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Alloy 2205 Properties

Chemical Composition (Alloy 2205)

Elements	C	Mn	P	S	Si	Cr	Ni	Mo	N
Min %	-	-	-	-	-	22.00	4.50	3.00	0.14
Max %	0.030	2.00	0.030	0.020	1.00	23.00	6.50	3.50	0.20

Mechanical Properties (Alloy 2205)

Condition / Heat Treatment	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness
Solution Annealed	655	450	25 %	293 HB / 31 HRC

Alloy 2205 Characteristics

Outstanding yield strength (approx. 450 MPa, double that of 316L).
Superior resistance to chloride stress corrosion cracking in sour environments.
High resistance to pitting and crevice corrosion (PREN ≥ 34-36).
High mechanical fatigue and erosion-corrosion resistance.
Lower thermal expansion and higher thermal conductivity than austenitic steels.

Applications

Offshore oil & gas subsea manifolds, valves, and flowlines.
Chemical process autoclaves, heat exchangers, and pressure vessels.
Seawater reverse-osmosis desalination equipment.
Flue gas desulfurization (FGD) systems and scrubbers.
Pulp and paper digesters and bleaching plants.

Alloy 2205