FLUX CORE WIRE : SOREX  SFC-309MOL

Gas Shielded Stainless Steel Flux Cored Wire (SFC-309MoL)

Fabricating severe-service equipment—such as chemical reactor vessels, flue gas desulfurization systems, paper mill digesters, and marine piping—often requires joining carbon steel structures to corrosion-resistant 316L stainless steel. The Gas Shielded Stainless Steel Flux Cored Wire (SFC-309MoL) series from Thermatech delivers high-productivity welding solutions powered by Sorex SFC-309MoL precision metallurgy.

Utilizing Sorex SFC-309MoL (AWS A5.22 E309MoLT1-1 / E309MoLT1-4) ensures superior crack resistance across transitional joints that encounter harsh chemical environments. The inclusion of Molybdenum (2.0% – 3.0%) in Gas Shielded Stainless Steel Flux Cored Wire (SFC-309MoL) significantly boosts pitting resistance in chloride-rich media compared to standard 309L wires. Furthermore, its over-alloyed composition prevents brittle martensite formation during base metal dilution, while extra-low carbon content protects against intergranular carbide precipitation.

Featuring an advanced titania slag system, Sorex SFC-309MoL delivers excellent arc control across flat, horizontal, vertical-up, and overhead welding positions. Compatible with economical 100% CO2 shielding gas or 80% Argon / 20% CO2 gas blends, this wire yields smooth, spatter-free weld beads with self-peeling slag. The resulting pore-free weld deposit easily satisfies 100% radiographic non-destructive testing (NDT) standards for critical pressure vessel and chemical processing applications.

SFC-309MoL is a rutile flux cored tubular wire for all positional welding using pure CO2 shielding gas. It performs with smooth arc transfer, low spatter level, fine ripple, fast freezing slag, easy control of weld pool, good heat and corrosion resistance.

Technical Advantages of Gas Shielded Stainless Steel Flux Cored Wire (SFC-309MoL)

Designed to optimize throughput and joint performance in demanding stainless steel fabrication shops, the Sorex SFC-309MoL product line offers clear operational advantages:

• Superior Resistance to Pitting & Crevice Corrosion: Molybdenum addition enhances halide and chloride corrosion protection on dissimilar metal joints and cladding overlays.
• High Deposition Rates & Travel Speed: Sorex SFC-309MoL gas-shielded flux-cored wire delivers higher deposition efficiency than solid MIG or TIG wire, drastically reducing total labor costs per joint.
• Self-Detaching Slag Layer: Fast-freezing slag contracts upon cooling, peeling away effortlessly without leaving burn marks or requiring heavy post-weld grinding.
• All-Position Arc Stability: Smooth spray transfer allows operators to maneuver between flat seams and vertical-up joints without puddle sagging or edge undercut.

APPLICATIONS :

Suitable for welding 22%Cr-12%Ni-2.5%Mo stainless steels and dissimilar metals such as ferritic and austenitic stainless steels, as well as for joining ferritic martensitic steels. It is also used for buffer layers of clad steels.

NOTE ON USAGE :

1. Use DC (+) polarity.
2. Maintain a higher welding speed in order to get enough penetration in the down hand welding position.

WELDING POSITION:

TYPICAL CHEMICAL COMPOSITION OF WELD METAL (wt%) :(Shielding Gas: 100% CO2)

Weld Metal Analysis :

Carbon (C)                                             0.030
Manganese (Mn)                                  0.89
Silicon (Si)                                             0.71
Phosphorus (P)                                     0.021
Sulphur (S)                                             0.012
Nickel (Ni)                                              13.60
Chromium (Cr)                                      23.4
Molybdenum (Mo)                                2.43

TYPICAL MECHANICAL PROPERTIES OF WELD METAL:(Shielding Gas: 100% CO2)

TS N/mm2                                             585
EL%                                                           37

APPROVALS :

ABS

SUGGESTED WELDING PARAMETERS (DC <+>)

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