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Offshore Floating Storage Vessel (FPSO) is a comprehensive offshore oil plant integrating the storage, separation and transportation of crude oil products. Crude oil produced from subsea wells is received through subsea pipelines, processed on board and stored in cargo tanks, where it is finally transported to shuttle tankers through an unloading system.
Super duplex stainless steel has a high molybdenum content, which greatly improves the corrosion resistance of stainless steel, which is very suitable for long-term use in environments with high chloride ion content, such as seawater, and is widely used in safety valves, pipelines, desulfurization towers and other components in FPSO modules.
Such customers generally have the following requirements for the deposition metal properties of the welding consumables of super duplex stainless steel (matching base metal UNS S32750/S32760, etc.):
|
Tensile strength（Mpa） |
Tensile length (%) |
Ferrite (Test) |
Pitting corrosion (40℃*24h) ASTM G48A |
Hardness HV10 |
pitting index PREN |
|
≥750 |
≥20 |
35-65% |
≤4g/m2 |
≤330 |
≥40 |
For the welding characteristics and related technical requirements of super duplex stainless steel, our company has the corresponding welding consumables to match, which are described as follows:
Matching welding consumables
|
Welding wire category |
S.S Argon arc welding wire |
S.S hand welding rod |
S.S flux cored welding wire |
S.S submerged arc welding wire |
|
product name |
GTS-2594 |
GES-2594 |
GFS-2594 |
GWS-2594 GXS-330 |
|
implementation standard |
AWS A5.9/5.9M-2017 ER2594 |
AWS A5.4/5.4M-2012 ER2594-16 |
AWS A5.22/5.22M-2012 ER2594T1-1 |
AWS A5.9/5.9M-2017 ER2594 |
Typical composition
|
product name |
GTS-2594 |
GES-2594 |
GFS-2594 |
GWS-2594 |
|
|
Alloy wt% |
C |
0.012 |
0.017 |
0.022 |
0.017 |
|
Mn |
0.62 |
1.05 |
0.76 |
0.42 |
|
|
Si |
0.45 |
0.40 |
0.49 |
0.64 |
|
|
Ni |
8.46 |
8.49 |
8.36 |
8.48 |
|
|
Cr |
25.02 |
25.69 |
24.2 |
24.88 |
|
|
Mo |
3.86 |
3.96 |
3.65 |
3.85 |
|
|
P |
0.022 |
0.019 |
0.016 |
0.023 |
|
|
S |
0.001 |
0.005 |
0.003 |
0.001 |
|
|
W |
0.02 |
0.01 |
0.01 |
0.04 |
|
|
N |
0.24 |
0.22 |
0.27 |
0.24 |
|
|
PREN* |
41.6 |
42.2 |
40.5 |
41.4 |
|
|
Remark |
Filler metal |
Deposition metal |
Filler metal |
Deposition metal |
|
Typical mechanical properties
|
product name |
GTS-2594 |
GES-2594 |
GFS-2594 |
GWS-2594 GXS-330 |
|
Tensile strength（Mpa） |
853 |
920 |
881 |
889 |
|
Tensile length (%) |
31 |
26 |
25 |
26 |
|
Impact absorption energy (J/℃) |
240/-46 |
51/-46 |
50/-40 |
56/-46 |
|
Ferrite （Test） |
49% |
43% |
36% |
40% |
|
Hardness HV10 |
280 |
295 |
289 |
292 |
|
pitting PREN |
2.5g/m3 |
2.8g/m3 |
2.9g/m3 |
2.7g/m3 |
More information contact +86 13252436578
Post time: Nov-15-2022