ER309L-Stainless Steel Wire ‌

Technical Compliance‌: AWS 5.14 Class ER309L / ASME SFA 5.14 Class ER309L

Product Overview

ER309L is a premium low-carbon austenitic stainless steel welding wire engineered for exceptional performance in Gas Metal Arc Welding (GMAW/MIG) and Gas Tungsten Arc Welding (GTAW/TIG) processes. Its optimized ferrite-austenite microstructure ensures superior crack resistance, weld integrity, and corrosion protection. This wire is specifically formulated for joining dissimilar metals—including low-alloy steels, heat-resistant steels, corrosion-resistant steels, and cladding layers—making it indispensable for critical fabrication and repair applications.

Key Features & Benefits

• Ultra-Low Carbon Content (<0.03%): Eliminates carbide precipitation, preventing intergranular corrosion and ensuring long-term stability in aggressive environments.

• Balanced Ferrite-Austenite Structure: Enhances resistance to hot cracking and ensures ductility under thermal stress.

• Superior Weldability: Produces smooth, spatter-free beads with excellent arc stability, reducing rework and enhancing efficiency.

• No Post-Weld Heat Treatment: Simplifies workflows and reduces operational costs.

• Broad Compatibility: Ideal for welding dissimilar combinations like stainless steel to carbon steel or clad surfaces.

• Exceptional Corrosion Resistance: Withstands oxidation and chemical exposure in demanding industrial settings.

Technical Specifications

• Standards: Complies with AWS A5.18 ER309L, EN 440 S309L, and ISO 14341-A-G 23 12 2.

• Available Diameters: 0.8mm, 1.0mm, 1.2mm, and 1.6mm.

• Packaging: 2kg/5kg spools or 15kg reels for flexible usage.

Applications

• Dissimilar Metal Joining: Critical for low-alloy steel to stainless steel connections in structural and mechanical components.

• Cladding & Overlay Welding: Provides a reliable base layer for surfacing applications.

• Chemical & Power Equipment: Tanks, reactors, and heat exchangers exposed to high temperatures and corrosive media.

• Industrial Repairs: Restores worn parts in manufacturing, marine, and petrochemical sectors.

Critical Usage Guidelines

1. Shielding Gas: Use CO₂ with ≥99.98% purity and maintain flow rates ≥20 L/min for 1.2mm/1.6mm wires.

2. Environment Control: Shield welding areas from drafts to prevent gas dispersal defects.

• Surface Preparation: Remove all oil, moisture, and contaminants prior to welding.

Why Choose ER309L?

ER309L combines technical excellence with practical advantages:

• Reliability: Consistent performance in high-stress, corrosive, or thermal cycling conditions.

• Efficiency: Reduces downtime with easy handling and minimal post-weld cleanup.

• Versatility: Compatible with both MIG and TIG processes across diverse industries.

   Guaranteed Value