SUPER DUPLEX 2507 STAINLESS STEEL PIPE
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 |
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 |
Heat ℃ |
σb (Mpa) ≥ |
σs(Mpa) ≥ |
δ% ≥ |
Hardness≤ |
|
|
Brinell |
Rockwell |
|||||
|
S32750（SAF2507） 00Cr25Ni7Mo4N |
1025-1125
Water |
800 |
550 |
15 |
310 |
32 |
|
S31803（SAF2205） 00Cr22Ni5Mo3N |
1020-1100
Water |
620 |
450 |
25 |
290 |
30.5 |
|
S31500(3RE60) 00Cr18Ni5Mo3Si2 |
980-1040
Water |
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 |
||||||||||||||
|
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
