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DUPLEX STAINLESS STEEL GRADE 2205 S32750

Category: Hot Sales Stainless Steel
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DUPLEX STAINLESS STEEL GRADE 2205 S32750

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Product & Characteristic

 

l         High strength, with yield strength, which is twice of 18-8 stainless steel.

l         Good pit corrosion resistance and chloride stress corrosion resistance.

l         Small tendency of welding heat crack.

l         Better heat conductivity, small linear expansion coefficient which is suitable to manufacture line of facilities, tube of heat exchange and clad plate.

l         Good processing hardening rate.

l         High rate of energy absorption and fine high shock resistance.

 

Conventional Products

Steel grade

Grade

Specifications (mm)

Weight MT

Standard

Application

Thickness

Width

Duplex series

TDS2101

S32304

TDS2003

S31803

SUS329J4L

S32750

S32906

S32760

2B/2D Surface: 0.6-5.0mm

No.1 surface:

5.0-100mm

2B/2D Surface:

30-2000

 

No.1 surface: 1000-3000

6-28MT

ASTMA240

JIS G

EN10028-7

DIN

Chemical vessels, pulp and papermaking,

Nuclear power,

Petrochemical

Desalination industry.

*Other sizes can be supply by request.

 

 

Chemical Composition

 

Grade

Classifi-
cation

Mass Percentage (%)

C

Si

Mn

P

S

Cr

Ni

Mo

Cu

N

TDS2101 S32101 1.4162

ASTM

0.040

1.00

4.00- 6.00

0.040

0.030

21.0- 22.0

1.35- 1.70

0.10- 0.80

0.10- 0.80

0.20- 0.25

Typical value

0.028

0.71

5.03

0.028

0.001

21.50

1.55

0.30

0.35

0.22

S32304

1.4362

Typical value

0.030

1.00

2.50

0.040

0.030

21.5- 24.5

3.00- 5.50

0.05- 0.60

0.05- 0.60

0.05- 0.20

Typical value

0.026

0.50

1.28

0.028

0.001

23.50

4.05

0.30

0.35

0.12

TDS2003

S32003

ASTM

0.030

1.00

2.50

0.030

0.020

19.5- 22.5

3.00- 4.00

1.50- 2.00

-

0.14- 0.20

Typical value

0.026

0.60

1.58

0.026

0.001

21.50

3.50

1.75

-

0.16

S31803

S32205

1.4462

SUS329J3L

ASTM

S31803

0.030

1.00

2.00

0.030

0.020

21.0- 23.0

4.50- 6.50

2.50- 3.50

-

0.08- 0.20

ASTM S32205

0.030

1.00

2.00

0.030

0.020

22.0- 23.0

4.50- 6.50

3.00- 3.50

-

0.14- 0.20

Typical value

0.025

0.55

1.2

0.028

0.001

22.50

5.40

3.20

-

0.17

SUS329J4L

JIS

0.030

1.00

1.50

0.040

0.030

24.0- 26.0

5.50- 7.50

2.50- 3.50

-

0.08- 0.30

Typical value

0.024

0.56

1.15

0.026

0.001

25.0

6.50

3.10

-

0.24

S32750 1.4410

ASTM

0.030

0.80

1.20

0.035

0.020

24.0- 26.0

6.00- 8.00

3.00- 5.00

0.50

0.24- 0.32

Typical value

0.026

0.55

0.78

0.026

0.001

25.5

7.40

4.10

0.30

0.28

S32906

ASTM

0.030

1.00

1.20

0.030

0.030

28.0- 30.0

5.80- 7.50

1.50- 2.60

0.80

0.30- 0.40

Typical value

0.026

0.55

0.83

0.024

0.001

29.2

6.80

2.10

0.50

0.27

S32706

1.4501

ASTM

0.030

1.00

1.00

0.030

0.010

24.0- 26.0

6.00- 8.00

3.00- 4.00

0.50- 1.00

0.20- 0.30

Typical value

0.026

0.55

0.78

0.028

0.001

25.5

7.20

3.50

0.75

0.26

l       S32706  W0.50-1.00testing value 0.65

 

Mechanical Properties

Mechanical properties at ambient temperature

Grade

Classification

Rp0.2/MPa

Rm/MPa

A/%

HB

TDS2101 S32101 1.4162

ASTM

450

620

25

293

Typical value

530

720

33

240

S32304

1.4362

ASTM

400

600

25

290

Typical value

520

710

35

245

TDS2003

S32003

ASTM

450

620

25

293

Typical value

530

730

31

235

S31803

S32205

1.4462

SUS329J3L

ASTM

450

620

25

293

ASTM

450

655

25

293

Typical value

550

750

33

255

 

SUS329J4L

ASTM

450

620

18

302

Typical value

550

760

28

257

 

S32750 1.4410

ASTM

550

795

15

310

Typical value

580

850

31

260

S32906

ASTM

550

750

25

310

Typical value

580

850

30

260

S32706

1.4501

ASTM

550

750

25

-

Typical value

600

870

29

252

 

 

The example of cost comparison is as below(The tank of “diameter 18m, height 18m” is made of material 316L, TDS2003 (S32003))

Classification

316L

TDS2003

Plate Thickness

5-16mm

5-12mm

Material Weights

72.50MT

56.66MT

Material Cost

2.46 Million RMB

1.75 Million RMB

Welding Cost

0.90 Million RMB

0.60 Million RMB

Labor Cost

1.50 Million RMB

0.90 Million RMB

Preliminary Total Cost

4.86 Million RMB

3.25 Million RMB

Calculation Method

l         316L density 7.93g/cm3

l         S32003 density 7.85g/cm3

l         Due to thickness reduction the metal filling quantity, electricity power as well as manpower of lifting, polishing etc can be reduced.

 

Anti-corrosion:

PREN=%Cr+3.3%(Mo+0.5W)+16%N

The pitting corrosion resistances usually take PREN as an assessment standard for reference.

Classification

Grade

Cr

Mo

N

PREN

Austenite

304L

18.50

-

0.03

18.98

316L

17.10

2.5

0.03

25.83

317L

18.20

3.10

0.03

28.91

904L

20.0

4.3

0.06

35.15

254SMO

19.7

6.05

0.20

42.87

Duplex

TDS2101

21.50

0.30

0.22

26.01

S32304

23.50

0.30

0.12

26.41

TDS2003

21.50

1.75

0.16

32.08

S31803

22.50

3.20

0.17

35.78

SUS329J4L

25.00

3.10

0.24

39.07

S32750

25.50

4.10

0.28

43.51

S32906

29.2

2.10

0.27

44.23

S32760

25.2

3.50

0.26

44.55

 

Critical pitting corrosion temperature (CPT) . Testing standard ASTM G150 (CPT varies according to the differences in the shape of product and the condition of surface polishing)

 

Welding

Keeping phases balance in heat affected zone(HAZ) is the most important for duplex stainless steel. It can successfully avoid the precipitated phases.

The most of welding methods for austenitic stainless steels are suitable to the duplex stainless steels. Such as SMAW, TIG(GTAW), MIG(GMAW), FCAW, SAW.

 

General rules for welding:

l         No pre-heating of welding.

l         Weld interpass temperature 150, temperature for 2507 100.

l         Need special welding material for duplex stainless steel.

l         Heat input varies with the composition and thickness of duplex stainless steels.

 

 

 

Physical properties

(W/(m. )) Thermal conductivity

Grade

Temperature

20

100

200

300

400

TDS2101

15

16

18

19

20

S32304

16

17

18

19

20

S31803

19

19

21

23

24

S32750

16

17

19

20

22

 

 

Processing and molding

Hot process and heat treatment temperature (Celsius degree)

 

TDS2101

S32304

S31803

S32750

Hot process Temp.

900-1100

900-1100

950-1150

1020-1200

Heat treatment Temp.

1020-1080

1020-1080

1020-1100

1050-1120

 

The precipitated phase in duplex stainless steel may result in the embrittlement, which will influence the operation performance. The formation temperature range of Q intermetallic phases is within 600-950C. Forferritic stainless steel, the transformation temperature is among 350-520C (475C brittleness). For this reason, the application temperature for duplex stainless steel should be below 250C.

Without Mo, 2101 duplex stainless steel is not sensitive to intermetallic phases precipitation such as Q phase and so on.

 

 

Package

l       Application of waterproof and damp-proof materials.

l       Damage avoided with protecting plank and shim.

l       Coil loosing and scratching prevented by means of vertical and horizontal tying up between coil layers.

l       Heavy plate package with water-proof material, strengthened frame to prevent plate from deformation.

 

 

Service Promise

l         To provide consumers with the personalized designs on composition, propertiesproperty, packing, coil weight and quality certificate.

l         Technical support to customers in material selection fabrication.

l         Accurate and prompt delivery

l         Response to customers claim within 24 hours.

 

 

 

Contact Us

 

Alicia (Ms.) / Sales Manager

                         

                          Tel:  +86-769-85325956

                          Fax: +86-769-82380569

                          Mob:+86-159-99718496

                          Email:Alicia@gloriasteel.com

                          MSN:Alicia-steel@hotmail.com  

                          Skype:Alicia-steel

                          QQ:309801984

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