Duplex Steel

Duplex Steel properties and price per kg

Duplex Steel grades at a glance with ASTM specification and equivalent chart

microstructure. The strength from the ferritic phase and the corrosion resistance properties from the austenitic phases are optimized in duplex steel. The different grades come by due to the addition of alloying materials present in different mixtures. The duplex steel grades are numbered for easy identification. The numbers also indicate the mixture by percentages of the major elements. There are three different groups of duplex stainless steel. The duplex, super duplex and lean duplex are the major groups within which there are different grades. Duplex contains chromium, molybdenum and nickel it its composition. It could either be hot rolled or cold drawn depending on the grades and products. The grading of Duplex stainless steel also indicates the pitting corrosion resistance which is indicated by the PREN number. The PREN number is basically an identification of the percentages of chromium, molybdenum and nickel in the composition. The lean duplex has the lowest PREN and has less pitting corrosion resistance but is very strong and used in the construction industry. The super duplex on the other hand has the highest PREN numbers which has very high pitting corrosion resistance and is used in the chemical industries. The standard duplex has a medium range of PREN numbers with medium pitting corrosion resistance. It is also the most widely used duplex due to the cost and balancing nature. We can provide you with a duplex steel price list upon contact. Depending on the duplex steel application size and the needed forms, types and shapes the purchase amount and the wholesale prices may change. We are a large duplex steel supplier in India. We supply all kinds and grades of duplex steel. Duplex is a coined name due to the nature of the material. It has dual characteristics gained from the austenitic and ferritic phases in its metallurgic

Duplex Steel Products

Duplex Steel Price Per Kg

UNS 31803 DUPLEX PLATE INR 329/kg

Duplex steel equivalent

Alloy Grade EN W-Nr UNS No. DIN Standard AFNOR SS
2707 HD - - S32707 - - -
2507 1.4410 - S32750 X 2 CrNiMoN 25 7 4 - 2328
2205 1.4462 1.4462 S31803/ S32205 X 2 CrNiMoN 22 5 3 Z 2 CND 22-05-03 2377
2304 1.4362 1.4362 S32304 X 2 CrNiN 23 4 Z 2 CN 23-04AZ 2327

Duplex Steel Grades

2205 UNS S31803 / S32205
2507 UNS S32750/ S32760/ S32550 / S39274
4501
UR52N+ UNS S32550
Zeron 100 UNS S32760
Ferralium 255 UNS S32550
Lean Duplex LDX 2101/ 2304/ 2404
Hyper Duplex

Duplex Steel ASTM Grades

Material Grade Seamless and welded pipes/ tubes Pipe Flanges Pipe Fittings Sheet, Plate and strips Rod / Bar Forging Items
2707 HD ASTM A789; A790 / SA789 - - - - -
2507 ASTM A789; A790/ SA789 ASTM A182 ASTM A182/ SA182,
ASTM A815/ SA815
ASTM A240/ SA240
EN 10088-2
ASTM A479/ SA479
EN 10088-3
ASTM A182/ SA182
2205 ASTM A789; A790/ SA789
NFA 49-217
ASTM A182 ASTM A182/ SA182,
ASTM A815/ SA815
ASTM A240/ SA240
EN 10088-2
ASTM A276/ SA276
ASTM A479/ SA479
EN 10088-3
ASTM A182/ SA182
2304 ASTM A789; A790 / SA789
EN 10216-5
- - ASTM A240/ SA240
EN 10088-2
EN 10088-3 EN 10088-3*

Duplex Steel material specification

Material Grade UNS No. ASTM / ASME Standard Specifications
2205
22Cr
UNS S31803
ASTM A182 (F51), A240, A276, A479, A789, A790, A815, A928, A988
ASME
 SA-182 (F51), SA-240, SA-798, SA-790, SA-815
SAE J405
2205
22Cr
UNS S32205 ASTM A182 (F60), A240, A276, A479, A480, A798/ SA798, A790/ SA790, A815, A928, A988
ASME
 SA-182 (F60), SA-240, SA-798, SA-790, SA-815
SAE J405
2507 UNS S32750 ASTM A182 F53, A240/ SA240, A276/SA276, A479, A789, A790, A815, A928, A988
SAE J405
  UNS S32760 ASTM A182 F55, A240/ SA240, A276/SA276, A314, A473, A479, A789/ SA789, A790, A815, A928, A988
SAE J405
International standards ASTM A182 F51, SUS 329J3L, STS329 J3LTP, S31803, SS2377, AISI 318 LN, Z3CND22-05Az

Duplex stainless steel temperature limits

Grade Temperature (°C/ °F)
2707 HD 1080-1120 Deg C/ 1976-2048 Deg F
2507 1050-1125 Deg C/ 1922-2057 Deg F
2205 1020-1100 Deg C/ 1868-2012 Deg F
2304 930-1050 Deg C/ 1706-1922 Deg F

Duplex Steel Applications

  • Biofuels Gas plants
  • Water transmission piping
  • Reactor / Pressure vessels tanks and heat exchangers
  • Seawater Desalination plants systems
  • Rotors, impellers and shafts in industrial use
  • Pulp and paper industry
  • Phosphoric acid production plants
  • Air pollution control systems
  • oil and gas industry
  • Mining and architectural purpose

Duplex Steel Composition

Steel Grade  WNR / UNS Type Chemical Equation
Cr N Ni Mo Mn W Cu
2101 LDX 1.4162/
S32101
 Lean 21.5 0.22  1.5 0.3 5 - -
DX2202 1.4062/ S32202 Lean 23 0.2 2.5 0.3 1.5 - -
RDN 903 1.4482/
S32001
Lean 20  0.11 1.8 0.2 4.2 - -
2304

1.4362/
S32304

 Lean 23  0.10 4.8  0.3 - - -
2205 1.4462/
S31803/
S32205
Standard  22 0.17 5.7 3.1 - - -
2507 1.4410/
S32750
Super 25 0.27 7 4 - - -
Zeron 100 1.4501/
S32760
Super 25 0.25  7 3.2 - 0.7 0.7
Ferrinox
255/
Uranus 2507Cu
1.4507/
S32520/
S32550
Super 25 0.25 6.5 3.5 - - 1.5

Duplex Steel properties

Grade Yield Strength
0.2% ksi (min)
Tensile Strength
ksi (min)
Elongation % Max Hardness (HB)

Max Hardness (Rockwell B)

Impact Energy, ft.-lbs.
2205 65 90 25 217
2304 58
(400)

87
(600)

25 293 31j
2507 80 min. 116 min. 15 min. 32 max. 74 min.
LDX 2101 65 ksi 94 ksi 30 290 (max)
Zeron 100 80 109 25 28 HRC

Corrosion Resistance of Duplex Stainless Steel

PREN = %Cr + 3.3 x %Mo + 16 x %N

Type Grade EN No/ UNS Typical PREN
Ferritic 430 1.4016/
S43000
18
Austenitic 304 1.4301/
S30400
 19
Austenitic 316  1.4401/
S31600
 24
Austenitic 316L 2.5 Mo 1.4435  26
Duplex 2205  1.4462/
S31803/
S32205
35
Duplex 2507 1.4410/
S32750
43
Austenitic 904L 1.4539/
N08904
34
Ferritic 441 1.4509/
S43932
19
Duplex RDN 903 1.4482/
S32001
 22
 Ferritic 444 1.4521/
S44400
24
Duplex 2101 LDX  1.4162/
S32101
26
Duplex 2304 1.4362/
S32304
26
Duplex DX2202 1.4062/ S32202 27
 Duplex Zeron 100  1.4501/
S32760
41
 Duplex Ferrinox 255/
Uranus 2507Cu
1.4507/
S32520/
S32550
 41
Austenitic 6% Mo 1.4547/
S31254
44

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