Stainless steel, duplex, LDX2101, annealed

LDX2101 Duplex Stainless Steel Designation

Wrought S-Steel:Duplex LDX 2101
Condition	Solution annealed
UNS number	S32101
EN number	1.4162

LDX2101 Duplex Stainless Steel Composition detail

C (carbon)	0	–	0.04	%
Cr (chromium)	21	–	22	%
Cu (copper)	0.1	–	0.8	%
Fe (iron)	67.3	–	73.2	%
Mn (manganese)	4	–	6	%
Mo (molybdenum)	0.1	–	0.8	%
N (nitrogen)	0.2	–	0.25	%
Ni (nickel)	1.35	–	1.7	%
P (phosphorus)	0	–	0.04	%
S (sulfur)	0	–	0.03	%
Si (silicon)	0	–	1	%

LDX2101 Duplex Stainless Steel, annealed, Physical properties

Density

7.69

–

7.76

g/cm3

LDX2101 Duplex Stainless Steel, annealed, Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25.2	–	26.6	MN.m/kg
Yield strength (elastic limit)	480	–	600	MPa
Tensile strength	700	–	840	MPa
Specific strength	62.2	–	77.7	kN.m/kg
Elongation	35	–	38	% strain
Compressive strength	480	–	600	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	480	–	600	MPa
Shear modulus	75	–	85	GPa
Poisson’s ratio	0.295	–	0.305
Shape factor	43
Hardness – Vickers	239	–	252	HV
Hardness – Rockwell B	96	–	101	HRB
Hardness – Rockwell C	21	–	22	HRC
Hardness – Brinell	222	–	233	HB
Elastic stored energy (springs)	582	–	891	kJ/m3
Fatigue strength at 10^7 cycles	470	–	530	MPa
Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles	415	–	600	MPa

LDX2101 Duplex Stainless Steel, annealed, Impact & fracture properties

Fracture toughness	144	–	176	MPa.m0.5
Toughness (G)	105	–	154	kJ/m2

LDX2101 Duplex Stainless Steel, annealed, 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	490	–	510	J/kg.°C
Thermal expansion coefficient	13	–	13.5	µstrain/°C
Thermal shock resistance	181	–	227	°C
Thermal distortion resistance	1.08	–	1.18	MW/m
Latent heat of fusion	386	–	467	kJ/kg

LDX2101 Duplex Stainless Steel, annealed, Electrical properties

Electrical resistivity	78.4	–	81.6	µohm.cm
Electrical conductivity	2.11	–	2.2	%IACS
Galvanic potential	-0.3	–	-0.22	V

LDX2101 Duplex Stainless Steel, annealed, Magnetic properties

Magnetic type

Magnetic

LDX2101 Duplex Stainless Steel, annealed, Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5020	–	5150	m/s
Mechanical loss coefficient (tan delta)	6e-4	–	7.4e-4

LDX2101 Duplex Stainless Steel, annealed, 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	23.8 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	0.866 – 1.12

LDX2101 Duplex Stainless Steel, annealed, 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

LDX2101 Duplex Stainless Steel, annealed, Corrosion resistance of metals

Pitting resistance equivalent number (PREN)	24.5 – 28.6
Pitting and crevice corrosion	Medium (20-30)
Stress corrosion cracking Note: Rated in chloride; Other susceptible environments: Hydrogen sulfide	Slightly 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

LDX2101 Duplex Stainless Steel, annealed, Standards with similar compositions

USA:S32001 to ASTM A240/A240M, S32001 to ASTM A789/A789M, S32001 to ASTM A959, S32101 to ASTM A240/A240M, S32101 to ASTM A276, S32101 to ASTM A479/A479M, S32101 to ASTM A959, UNS S32001, UNS S32101