Stainless steel, duplex, AISI 2205, annealed

AISI 2205, annealed, Duplex Stainless Steel Designation

Wrought S-Steel: AISI 2205, annealed
Condition	Solution annealed
UNS number	S31803 – S32205
US name	ASTM S32205, ASTM S31803, ASTM F60, ASTM F51
EN name	X2CrNiMoN22-5-3
EN number	1.4462
ISO name	X2CrNiMoN22-5-3
JIS (Japanese) name	SUS329J3L

AISI 2205, annealed, Duplex Stainless Steel Tradenames

Springflex

AISI 2205, annealed, Duplex Stainless Steel Composition detail

C (carbon)	0	–	0.03	%
Cr (chromium)	21	–	23	%
Fe (iron)	63.7	–	71.9	%
Mn (manganese)	0	–	2	%
Mo (molybdenum)	2.5	–	3.5	%
N (nitrogen)	0.08	–	0.2	%
Ni (nickel)	4.5	–	6.5	%
P (phosphorus)	0	–	0.03	%
S (sulfur)	0	–	0.02	%
Si (silicon)	0	–	1	%

AISI 2205, annealed, Duplex Stainless Steel Physical properties

Density

7.8

–

7.82

g/cm3

AISI 2205, annealed, Duplex Stainless Steel Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25	–	26.2	MN.m/kg
Yield strength (elastic limit)	460	–	510	MPa
Tensile strength	640	–	950	MPa
Specific strength	58.9	–	65.3	kN.m/kg
Elongation	20	–	25	% strain
Compressive strength	460	–	510	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	460	–	510	MPa
Shear modulus	75	–	85	GPa
Poisson’s ratio	0.295	–	0.305
Shape factor	47
Hardness – Vickers	248	–	310	HV
Hardness – Rockwell B	99	–	108	HRB
Hardness – Rockwell C	22	–	31	HRC
Hardness – Brinell	278	–	308	HB
Elastic stored energy (springs)	529	–	651	kJ/m3
Fatigue strength at 10^7 cycles	261	–	289	MPa
Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles	191	–	396	MPa

AISI 2205, annealed, Duplex Stainless Steel – Impact & fracture properties

Fracture toughness	144	–	195	MPa.m0.5
Toughness (G)	106	–	187	kJ/m2

AISI 2205, annealed, Duplex Stainless Steel Thermal properties

Melting point	1400	–	1450	°C
Maximum service temperature	335	–	365	°C
Minimum service temperature	-60	–	-50	°C
Thermal conductivity	14.4	–	15.6	W/m.°C
Specific heat capacity	480	–	500	J/kg.°C
Thermal expansion coefficient	13.5	–	18.2	µstrain/°C
Thermal shock resistance	132	–	181	°C
Thermal distortion resistance	0.82	–	1.12	MW/m
Latent heat of fusion	378	–	457	kJ/kg

AISI 2205, annealed, Duplex Stainless Steel Electrical properties

Electrical resistivity	78.4	–	81.6	µohm.cm
Electrical conductivity	2.11	–	2.2	%IACS
Galvanic potential	-0.26	–	-0.18	V

AISI 2205, annealed, Duplex Stainless Steel Magnetic properties

Magnetic type

Magnetic

AISI 2205, annealed, Duplex Stainless Steel Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5000	–	5120	m/s
Mechanical loss coefficient (tan delta)	6e-4	–	7.4e-4

AISI 2205, annealed, Duplex Stainless Steel Processing properties

Metal casting	Unsuitable
Metal cold forming	Limited use
Metal hot forming	Acceptable
Metal press forming	Limited use
Metal deep drawing	Limited use
Machining speed	15.8 m/min
Weldability Notes: Preheating and post weld heat treatments are not required	Good
Weldability – MIG	Good
Weldability – plasma	Good
Weldability – SAW	Good
Weldability – TIG	Good
Brazeability	Fair
Carbon equivalency	0.942 – 1.24

AISI 2205, annealed, Duplex Stainless Steel Durability

Water (fresh)	Excellent
Water (salt)	Excellent
Weak acids	Excellent
Strong acids	Acceptable
Weak alkalis	Excellent
Strong alkalis	Excellent
Organic solvents	Excellent
Oxidation at 500C	Excellent
UV radiation (sunlight)	Excellent
Galling resistance (adhesive wear) Notes: Aluminum bronze is the most suitable mating material to minimize galling.	Limited use
Flammability	Non-flammable

AISI 2205, annealed, Duplex Stainless Steel Corrosion resistance

Pitting resistance equivalent number (PREN)	30.5 – 37.8
Pitting and crevice corrosion	High (30-40)
Stress corrosion cracking Note: Rated in chloride; Other susceptible environments: Hydrogen sulfide	Not susceptible
Intergranular (weld line) corrosion	Excellent
Inorganic acids	Good
Organic acids	Good
Alkalis	Moderate
Humidity / water	Excellent
Sea water	Good
Sour oil and gas	Good

AISI 2205 Duplex Stainless Steel Notes

This is a second generation of duplex.

AISI 2205 Duplex Stainless Steel Standards with similar compositions

International: X2CrNiMoN22-5-3 to ISO 16143-1, X2CrNiMoN22-5-3 to ISO 16143-2, X2CrNiMoN22-5-3 to ISO 16143-3, X2CrNiMoN22-5-3 to ISO 9327-5, X2CrNiMoN22-5-3 to ISO 9328-7

Japan: SUS329J3L to JIS G4303, SUS329J3L to JIS G4304, SUS329J3L to JIS G4305, SUS329J3LTB to JIS G3463, SUS329J3LTP to JIS G3459, SUS3329J3LTPY to JIS G3468

South Korea: STS 329J3L to KS D 3706, STS329J3L to KS D 3698, STS329J3L to KS D 3705

Sweden: 2377 to SS 142377

UK: 318S13 to BS 1501/3, X2CrNiMoN22-5-3 to BS EN 10088-1, X2CrNiMoN22-5-3 to BS EN 10088-2, X2CrNiMoN22-5-3 to BS EN 10088-3, X2CrNiMoN22-5-3 to BS EN 10216-5, X2CrNiMoN22-5-3 to BS EN 10222-5, X2CrNiMoN22-5-3 to BS EN 10250-4, X2CrNiMoN22-5-3 to BS EN 10272, X2CrNiMoN22-5-3 to BS EN 10296-2, X2CrNiMoN22-5-3 to BS EN 10297-2

USA: F51 to ASTM A182/A182M, F60 to ASTM A182/A182M, S31803 to ASTM A240/A240M, S31803 to ASTM A270, S31803 to ASTM A276, S31803 to ASTM A479/A479M, S31803 to ASTM A789/A789M, S31803 to ASTM A790/A790M, S31803 to ASTM A815/A815M, S31803 to ASTM A949/A949M, S31803 to ASTM A955/A955M, S31803 to ASTM A959, S31803 to ASTM A988/A988M-98, S31803 to SAE J405, S32205 to ASTM A240/A240M, S32205 to ASTM A270, S32205 to ASTM A479/A479M, S32205 to ASTM A789/A789M, S32205 to ASTM A790/A790M, S32205 to ASTM A815/A815M, S32205 to ASTM A959, S32205 to SAE J405, UNS S31803, UNS S32205

Tradenames: AL 2205, AL ALLOY, ALLEGHENY LUDLUM AL 2205 ALLOY, AVESTA 2205 CODE PLUS TWO, AVESTA SHEFFIELD 2205 PRODEC, EASTERN STAINLESS ES-2205, J&L 2205, KRUPP FALC 223, RA2205, SLATER TYPE 2205, SUMITOMO DP8, V225MN, VLX 562