SUPER DUPLEX 2507 STAINLESS STEEL PIPE

05 Dec

SUPER DUPLEX 2507 STAINLESS STEEL PIPE

2017-12-05

SUPER DUPLEX 2507 STAINLESS STEEL PIPE is a
ferritic-austenitic (biphasic) stainless steel that combines the most
beneficial properties of many ferritic and austenitic steels because of their
high levels of chromium and molybdenum The ability to resist pitting corrosion,
crevice corrosion and uniform corrosion.The biphasic microstructure ensures
that the steel has a high resistance to stress corrosion cracking, and the
mechanical strength is also high.


Typical 2507 Duplex Stainless Steel Microstructure

2507 stainless steel used in the oil and gas industry; offshore stone breaking
oil platform (heat exchanger tubes, water treatment and water supply systems,
fire protection systems, water systems, water stabilization systems;
petrochemical equipment; desalination (desalination) equipment High-pressure
pipe, sea water pipe); both high strength and high corrosion resistance of the
mechanical and structural components; combustion (waste) gas purification
equipment. Main components: 25Cr-7Ni-4Mo-0.27N

SUPER DUPLEX
2507 STAINLESS STEEL PIPE RELATED PRODUCTS

● super duplex
2507 stainless steel pipe seamless

● super duplex
2507 stainless steel pipe welded

● super duplex
2507 stainless steel pipe fittings

● super duplex
2507 stainless steel pipe flanges

● super duplex
2507 stainless steel valves

SUPER DUPLEX
2507 STAINLESS STEEL PIPE CORROSION RESISTANCE
1. Usual Corrosive
The higher chromium and molybdenum content of SAF 2507 has a strong resistance
to overall corrosion of organic acids such as formic acid, acetic acid, etc.
The SAF2507 alloy has a strong resistance to inorganic acids, especially those
containing chloride The corrosion resistance.
Compared to 904L, SAF2507 has a stronger corrosion resistance to diluted
sulfuric acid ions. 904L is an austenitic alloy that is designed to withstand
pure sulfuric acid corrosion.
316L grade can not be used in hydrochloric acid environment, it may be subject
to local corrosion or corrosion.

SAF2507 can be
used for dilution of hydrochloric acid environment, has a strong anti-stain and
anti-fissure corrosion ability.
2. intergranular corrosion
The lower carbon content of the nSAF 2507 greatly reduces the risk of carbide
precipitation in the intergranular phase during heat treatment, and therefore
the alloy has a strong ability to resist intergranular corrosion associated
with carbides.
3. Stress corrosion cracking
The compound structure of SAF 2507 has a strong resistance to stress corrosion
cracking. Due to its high alloy content, SAF 2507 has better corrosion resistance
and strength than 2205.
Cracks in the construction and other aspects is almost inevitable, which makes
the stainless steel in the chloride environment more susceptible to corrosion.

SAF 2507 has a
strong ability to crack corrosion resistance. SAF 2507 containing 2000ppm
chloride ion in the sulfuric acid corrosion curve 0.1 mm / year; Corrosion
curve in hydrochloric acid 0.1 mm / year.

Mechanical
properties: SAF 2507 has a high compressive strength, impact strength and low
coefficient of thermal expansion and high thermal conductivity. These features
apply to many structural parts and mechanical parts. SAF 2507 impact strength
is high, not long-term placed Higher than 570 ° F in the
temperature environment, this may weaken its toughness. Tensile strength: σb ≥ 730Mpa;
Elongation: δ ≥ 20%
Supporting welding consumables: ER2594 welding wire, E2594 electrode
Applications: pulp and paper industry, desalination, flue gas purification,
heat exchangers, chemical tanker piping systems, seawater systems.

SUPER DUPLEX 2507 STAINLESS
STEEL PIPE CHEMICAL COMPOSITION:

STEEL
Grade

C≤

Mn≤

Si≤

S≤

P≤

Cr

Ni

Mo

Cu≤

N

S32750（SAF2507）

00Cr25Ni7Mo4N

0.03

1.2

0.8

0.02

0.035

24/

26

6.0/

8.0

3.0/

5.0

0.5

0.24/

0.32

S31803（SAF2205）00Cr22Ni5Mo3N

0.03

2.0

1.0

0.02

0.03

21/

23

4.5/

6.5

2.5/

3.5

0.08/

0.20

S31500(3RE60)

00Cr18Ni5Mo3Si2

0.03

1.2/

2.0

1.4/

2.0

0.03

0.03

18/

19

4.25

5.25

2.5/

3.0

0.05/

0.10

After proper solution treatment of 2507
stainless steel, the microstructure of the steel is more ideal than the dual
phase structure of alpha / gamma ratio of 50/50. When the solution temperature
is above 1050 DEG C, the ferrite phase number increases with the increase of
temperature, but because of the high nitrogen content, there is no significant
change in the phase ratio below 1300. This steel without aging at different
temperature (or heat effect), in the alpha + gamma matrix will be formed and
delta gamma 2, x, R, alpha ` intermetallic phases and Cr2N oxide precipitates,
because the carbon content of the steel is low (usually 0.01%-0.02%), so in
general no carbide steel.

SUPER DUPLEX 2507 STAINLESS STEEL PIPE
MECHANICAL PROPERTY:

STEEL
GRADE

Heat
treatment temperature

℃

σb (Mpa)

≥

σs(Mpa)

≥

δ%

≥

Hardness≤

Brinell

Rockwell

S32750（SAF2507）

00Cr25Ni7Mo4N

1025-1125

Water
quenching

800

550

15

310

32

S31803（SAF2205）

00Cr22Ni5Mo3N

1020-1100

Water
quenching

620

450

25

290

30.5

S31500(3RE60)

00Cr18Ni5Mo3Si2

980-1040

Water
quenching

630

440

30

290

30.5

First, super duplex 2507 stainless steel pipe
at room temperature Mechanical properties:
Steel varieties: wall thickness ≤ 20mm; δb / MPa: 800-1000, δ0.2 / MPa: ≥550, δ5 /%: ≥25, hardness (HV): 290
Second, super duplex 2507 stainless steel plate at room temperature – 200 ℃ mechanical properties:
Steel varieties temperature / ℃ δb / MPa
Room temperature ≥ 530
Plate 100 ≥ 450
200 ≥ 400
Third, the mechanical properties of super duplex 2507 stainless steel pipe
large diameter seamless
Outer diameter × wall thickness δb / MPa δ0.2 / MPa δ5 /% Hardness (HV)
273.0 mm x 4.19 mm 894 644 40 284
323.9 mm x 4.57 mm 858 662 45 270
406.4mm x 4.74mm 854 657 41 272

Super Duplex 2507 (S32750) Stainless Steel
pipe is a higher corrosion resistance and better mechanical properties than
duplex stainless steel 2205 (S31803). Often used in offshore oil platforms
(heat exchanger tubes, water treatment and water supply systems, fire
protection systems, water systems, water stabilization systems), desalination
(desalination) equipment (Ro equipment in the high-pressure pipe, sea water
pipes) and other special chemical environment Equipment. Name S32750, SAF2507,
F53, GB 00Cr25Ni7Mo4N. Applications: oil and gas industry equipment; offshore
platforms, heat exchangers, underwater equipment, fire fighting equipment;
chemical processing industry, utensils and piping industry; desalination
plants, submarine pipelines; mechanical parts (high strength, corrosion
resistant parts), Energy industry FGD system, industrial scrubbing system,
absorption tower and so on.

SUPER DUPLEX
2507 STAINLESS STEEL PIPE SEAMLESS AND WELDED AVAILABLE SIZES IN STOCK OR
ARRANGE PRODUCTION:

INCH

inch   sizc(ID)

OD

STANDARD
WALL THICKNESS

SCH   5s

SCH  10S

SCH  10

SCH   20

SCH   30

SCH    40

SCH   60

SCH    80

SCH    100

SCH    120

SCH    140

SCH    160

STD

XS

XXS

 1/8

DN6

10.3

–

1.24

–

–

–

1.73

–

2.42

–

–

–

–

1.73

2.41

–

 1/4

DN8

13.7

–

1.65

–

–

–

2.24

–

3.02

–

–

–

–

2.24

3.02

–

 3/8

DN10

17.1

–

1.65

–

–

–

2.31

–

3.2

–

–

–

–

2.31

3.2

–

 1/2

DN15

21.3

1.65

2.11

–

–

–

2.77

–

3.73

–

–

–

4.78

2.77

3.73

7.47

 3/4

DN20

26.7

1.65

2.11

–

–

–

2.87

–

3.91

–

–

–

5.56

2.87

3.91

7.82

1

DN25

33.4

1.65

2.77

–

–

–

3.38

–

4.55

–

–

–

6.35

3.38

4.55

9.09

1.1/4

DN32

42.2

1.65

2.77

–

–

–

3.56

–

4.85

–

–

–

6.35

3.58

4.85

9.7

1.1/2

DN40

48.3

1.65

2.77

–

–

–

3.68

–

5.05

–

–

–

7.14

3.68

5.08

10.15

2

DN50

60.3

1.65

2.77

–

–

–

3.91

–

5.54

–

–

–

8.74

3.91

5.54

11.07

2.1/2

DN65

73

2.11

3.05

–

–

–

5.16

–

7.01

–

–

–

9.53

5.16

7.01

14.02

3

DN80

88.9

2.11

3.05

–

, –

–

5.49

–

7.62

–

–

–

11.13

5.49

7.52

15.24

3.1/2

DN90

101.6

2.11

3.05

–

–

–

5.74

–

8.08

–

–

–

–

5.74

8.08

–

4

114.3

2.11

3.05

–

–

–

6.02

–

8.58

–

11.13

–

13.49

6.02

8.56

17.12

5

DN125

141.3

2.77

3.4

–

–

–

6.55

–

9.53

–

12.7

–

15.88

6.55

9.53

18.05

6

DN150

168.3

2.77

3.4

–

–

–

7.11

–

10.97

–

14.27

–

18.26

7.11

10.97

21.95

8

DN200

219.1

2.77

3.76

–

6.35

7.04

8.18

10.31

12.7

15.09

18.26

20.62

23.01

8.18

12.7

22.23

10

DN250

273.1

3.4

4.19

–

6.35

7.8

9.27

12.7

15.09

18.26

21.44

25.4

28.58

9.27

12.7

25.4

12

DN300

323.9

3.96

4.57

–

6.35

8.38

10.31

14.27

17.48

21.44

25.4

28.58

33.32

9.35

12.7

25.4

14

DN350

355.5

3.96

4.78

6.35

7.92

9.53

11.13

15.09

19.05

23.83

27.79

31.75

35.71

9.53

12.7

–

16

DN400

406.4

4.19

4.78

6.35

7.92

9.53

12.7

16.66

21.44

26.19

30.96

36.53

40.49

9.53

12.7

–

18

DN450

457

4.19

4.78

6.35

7.92

11.13

14.27

19.05

23.83

29.36

34.93

39.67

45.24

9.53

12.7

–

20

DN500

508

4.78

5.54

6.35

9.53

12.7

15.09

20.62

26.19

32.54

38.1

44.45

, 50.01

9.53

12.7

–

22

DN550

559

4.78

5.54

6.35

9.53

12.7

–

22.23

28.58

34.93

41.28

47.63

53.98

9.53

12.7

–

24

DN600

610

5.54

6.35

6.35

9.53

14.27

17.48

24.61

30.96

38.89

46.02

52.37

59.54

9.53

12.7

–

26

DN650

660

–

–

7.92

12.7

–

–

–

–

–

–

–

–

9.53

12.7

–

28

DN700

711

–

–

7.92

12.7

15.88

–

–

–

–

–

–

–

9.53

12.7

–

30

DN750

762

6.35

7.92

7.92

12.7

15.88

–

–

–

–

–

–

–

9.53

12.7

–

32

DN800

813

–

–

7.92

12.7

15.88

17.48

–

–

–

–

–

–

9.53

12.7

–

34

DN850

864

–

–

7.92

12.7

15.88

17.48

–

–

–

–

–

–

9.53

12.7

–

36

DN900

914

–

–

7.92

12.7

15.88

19.05

–

–

–

–

–

–

9.53

12.7

–

38

DN950

965

–

–

–

–

–

–

–

–

–

–

–

–

9.53

12.7

–

40

DN1000

1015

–

–

–

–

–

–

–

–

–

–

–

–

9.53

12.7

–

42

DN1050

1067

–

–

–

–

–

–

–

–

–

–

–

–

9.53

12.7

–

44

DN1100

1118

–

–

–

–

–

–

–

–

–

–

–

–

9.53

12.7

–

46

DN1150

1188

–

–

–

–

–

–

–

–

–

–

–

–

9.53

12.7

–

48

DN1200

1219

–

–

–

–

–

–

–

–

–

–

–

–

SUPER DUPLEX 2507 STAINLESS STEEL PIPE SEAMLESS AND WELDED PICTURES SEAMLESS

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