Duplex & Super Duplex Steel SAW & Flux
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Duplex and super duplex steels require SAW consumables that preserve their critical dual-phase austenitic-ferritic structure. The correct SAW wire and flux pairing ensures the weld remains strong, tough, and resistant to corrosion following the welding process.
Duplex and super duplex steel SAW and flux products provide a good balance of ferrite and austenite in the weld. They provide high resistance to pitting and crevice corrosion. These consumables maintain good impact toughness at low temperatures. They also deliver high tensile strength and resist stress corrosion cracking in chloride-rich settings.
Selecting duplex and super duplex SAW consumables simplifies managing corrosive substances and mechanical tension in joints. By optimising deposition rates for dense sections, SAW expedites the construction of large-diameter pipelines and massive vessels. Specialised flux chemistry prevents nitrogen depletion, maintaining the austenitic-ferritic phase equilibrium required for high-performance alloy welding across these critical and demanding industrial applications for long-term reliability.
These products are used in offshore oil and gas platforms, desalination plants, chemical processing vessels, pulp and paper digesters, and marine piping systems. They are common in projects that demand long service life in seawater or acid-containing environments.
Nicorex Alloys is a Mumbai-based supplier and stockist of duplex & super duplex steel SAW & flux products. We supply these grades to refineries, offshore fabricators, and chemical plants across India and export markets. Nicorex Alloys sources them from approved mills and keeps a ready stock for quick dispatch.
Complete Range of Duplex & Super Duplex Steel SAW & Flux
| Product Grade | Best Metals They Can Weld | Reason |
|---|---|---|
|
ER2209 SAW Wire & Flux
|
UNS S31803, UNS S32205 duplex stainless steels | Matches the duplex microstructure with correct ferrite-austenite balance for corrosion and strength. |
|
ER310MOD / ER310MOL Welding Wire
|
Dissimilar joints between duplex steel and carbon steel or austenitic grades | High-nickel, low-carbon deposit prevents brittle phases at the fusion line in mixed-metal welds. |
|
HASTELLOY B-3 Welding Wire
|
Hastelloy B-3 and nickel-molybdenum alloys used alongside duplex systems | Provides superior resistance to hydrochloric acid in process piping that connects to duplex headers. |
|
Waspaloy Welding Wire
|
Waspaloy and nickel-base superalloys in high-temperature sections joined to duplex piping | Retains creep strength at elevated temperatures where duplex transitions to superalloy components. |
Quick Selection Matrix
| Base Metal Being Welded | Recommended Electrode | AWS Class | Why This Choice |
|---|---|---|---|
| UNS S31803 (2205 Duplex) | AWS Class ER2209 SAW & Flux | ER2209 | Deposit matches the duplex phase ratio and resists pitting in chloride service. |
| UNS S32750 (2507 Super Duplex) | AWS Class ER2209 SAW & Flux | ER2209 | Provides a weld with high PREN value suited to seawater and acid chloride exposure. |
| Duplex-to-Carbon Steel Transition Joint | ER 310MOD/ER310MOL Welding Wire | ER310Mo | Over-alloyed nickel content avoids carbon migration and brittle martensite at the joint. |
| Duplex-to-Austenitic Stainless Transition | ER 310MOD/ER310MOL Welding Wire | ER310Mo | Low-carbon, high-alloy filler prevents sensitization and keeps full corrosion resistance. |
| Hastelloy B-3 (Connected Process Piping) | HASTELLOY® B-3 Welding Wire | ERNiMo-10 | Resists reducing acids and retains ductility in as-welded condition. |
| Waspaloy (High-Temp Transition Sections) | Waspaloy Welding Wire | ERNiCrMo-13 | Maintains creep and oxidation resistance above 700°C where superalloy sections begin. |
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