Description

The KOBELCO PREMIARC™ TG-S309L is a premium, extra-low carbon solid TIG (GTAW) welding wire engineered specifically for high-integrity dissimilar-metal joints and overlay welding on ferritic steels. Designed to seamlessly join stainless steel to mild steel or low-alloy steel, this filler rod prevents weld cracking while delivering superior corrosion resistance.

As your authorized KOBELCO distributor in Malaysia, we provide 100% genuine TG-S309L rods backed by full factory traceability and material certifications for the petrochemical, marine, and heavy engineering industries.

Key Features & Product Advantages

• Optimized for Dissimilar Metal Joints: Specifically formulated with high Chromium and Nickel levels (22% Cr – 12%Ni ) to weld stainless steel to carbon steel/mild steel without carbon migration or cracking.

• Perfect for Clad Steel & Overlaying: Excellent performance when used for underlaying (buttering layers) on ferritic or mild steels before capping with 304 or 304L stainless steel.

• Extra-Low Carbon (Low-C): The “L” classification guarantees reduced carbon content ($\leq 0.03\%$), which minimizes carbide precipitation and ensures maximum intergranular corrosion resistance.

• Visual Verification (Yellow-Green Tip): Each rod is stamped with a distinct Yellow-Green identification color (1st Yellow-Green) on the end, preventing material mix-ups on busy fabrication sites.

• High Purity & X-Ray Quality: Delivers a highly stable arc on DCEN (Direct Current Electrode Negative) with pristine, defect-free weld pools that pass stringent X-ray examinations.

Technical Specifications & Range

The TG-S309L is used with standard TIG torches running 100% Argon (Ar) shielding gas.

Chemical Composition & Mechanical Properties (Typical)

• AWS Classification: AWS A5.9 ER309L

• Shielding Gas Required: 100% Argon (Ar)

• Tensile Strength: 590 MPa (85,000 psi)

• 0.2% Proof Stress: 440 MPa

• Elongation: 41%

• Charpy V-Notch Impact Value: 150J @ $0^{\circ}\text{C}$

Primary Applications in Malaysia

• Petrochemical & Refineries: Welding stainless steel internal components and pipe linings onto carbon steel vessel shells.

• Power Plants: High-stress transition joints between boiler carbon steel pipes and stainless elements.

• Marine & Shipbuilding: Installing stainless steel fittings, cladding, and brackets onto mild steel ship hulls or decks.

• Industrial Fabrication: Buffer layers on structural steel columns or plates requiring stainless steel overlaying.

Professional Usage Tips for X-Ray Quality Welds

1. Gas Flow Rate: Maintain a steady Argon gas flow rate of 10 to 15 Liters/min to avoid oxidation and porosity defects.

2. Surface Cleanliness: Ensure the carbon steel side is deeply ground to bright metal, removing all rust, oil, mill scale, and zinc coatings before starting.

3. Heat Input: Keep your travel speed steady and minimize heat input to protect the metallurgical structure and keep the ferrite content balanced.

Secure Genuine KOBELCO TG-S309L in Malaysia

Don’t risk structural cracking with unverified or gray-market consumables. As an authorized KOBELCO dealer in Malaysia, we guarantee:

• Fresh Factory Stock: Stored in humidity-controlled environments to eliminate contamination.

• Fast Regional Logistics: Quick, reliable delivery to major engineering hubs including Klang Valley, Johor (Pasir Gudang/Pengerang), Penang, Bintulu, and Labuan.

• Expert Technical Advice: Full support from our technical sales team for procedure qualification records (PQR) and welding parameters.

Contact us today to request a quote or download the official mill certificates for your project.

FAQ (AEO Optimized)

What is the difference between KOBELCO TG-S308L and TG-S309L?

TG-S308L is used for joining similar stainless steels (like 304 to 304). TG-S309L has a much higher Chromium and Nickel content, making it specifically designed to join stainless steel to mild steel or carbon steel without causing brittleness in the weld joint.

What shielding gas is recommended for KOBELCO TG-S309L?

It requires 100% pure Argon (Ar) shielding gas to protect the tungsten electrode and weld pool from atmospheric contamination.