FLUX CORE WIRE : SOREX  SFC-309L

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

Joining dissimilar metals—such as welding carbon steel structural frames to stainless steel sheets or applying buffer layers prior to full stainless cladding—requires filler metals engineered to accommodate base metal dilution without cracking. The Gas Shielded Stainless Steel Flux Cored Wire (SFC-309L) series from Thermatech offers maximum metallurgical reliability powered by Sorex SFC-309L manufacturing precision.

Utilizing Sorex SFC-309L (AWS A5.22 E309LT1-1 / E309LT1-4) allows fabrication shops to complete high-strength transitional joints significantly faster than traditional solid MIG wire or manual stick welding. The elevated Chromium (23%) and Nickel (12%) alloy chemistry in Gas Shielded Stainless Steel Flux Cored Wire (SFC-309L) ensures that the resulting weld deposit maintains adequate ferrite levels to prevent hot cracking, even when diluted by carbon steel base metal. Additionally, the extra-low carbon content (C ≤ 0.04%) minimizes intergranular carbide precipitation during multi-pass operations.

Equipped with a fast-freezing titania slag, Sorex SFC-309L provides excellent arc control across flat, horizontal, vertical-up, and overhead positions. Fully compatible with economical 100% CO2 gas or an 80% Argon / 20% CO2 gas mixture, this consumable produces smooth, spatter-free weld beads with self-peeling slag. The resulting dense, sound weld deposits consistently pass 100% radiographic non-destructive testing (NDT) for critical chemical, marine, and pressure equipment fabrications.

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

Engineered to optimize shop throughput and joint integrity during dissimilar welding applications, the Sorex SFC-309L product line delivers distinct operational benefits:

• High Deposition Efficiency: Sorex SFC-309L gas-shielded flux-cored wire yields faster travel speeds and higher metal deposition rates than conventional solid MIG wire, substantially reducing labor costs per joint.
• Excellent Dilution Control for Dissimilar Joints: Over-alloyed composition prevents brittle martensite formation when joining carbon steel to 300-series stainless steel.
• Self-Detaching Slag Layer: Fast-freezing slag contracts quickly upon cooling, peeling away effortlessly without leaving burn marks or requiring extensive 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.

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

APPLICATIONS ;

Suitable for welding 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.

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