TIG Rod ER308LSi Stainless Steel – Professional Austenitic Filler Wire

Overview

The ER308LSi is an austenitic stainless steel TIG filler rod engineered for critical applications where material integrity and weld quality are non-negotiable. The deliberate silicon addition improves molten pool fluidity, resulting in visually superior beads with minimal spatter—a distinct advantage when your customers demand cosmetic finishes alongside structural performance. This rod performs reliably across all welding positions and integrates seamlessly into shops already stocking alternative molybdenum-enhanced stainless rods for higher-corrosion environments.

Key Features

• Ultra-low carbon austenitic composition (C: 0.023%) – minimizes sensitization risk in the heat-affected zone, critical for pressure vessel and food-grade applications
• Silicon-enhanced fluidity – smoother metal transfer, better bead cosmetics, reduced feeding resistance
• Stable arc characteristics – consistent performance across position variations; fewer restarts and touch-ups required
• All-position capability – eliminates the need for position-specific rod inventory
• AWS/ISO/JIS/GB certified – meets international welding standards for petrochemical, medical, and pressure vessel industries

Why Distributors Stock This Rod

Margin & Turnover:

• Entry-level stainless TIG rod with strong demand in food processing, pharmaceutical, and light petrochemical sectors
• Bulk packaging (5 kg spools) supports consistent shop consumption without excessive inventory
• Price-point accessibility attracts smaller fabrication shops while maintaining professional-grade quality

Technical Differentiation:

• Silicon addition sets this rod apart from standard ER308L – customers notice the bead quality improvement immediately, driving repeat orders
• Lower carbon content (0.023%) is a proven selling point for shops welding SUS 304L and similar sensitization-critical materials
• Certification across AWS, ISO, JIS, and GB standards provides coverage for international customers

Shop Loyalty:

• Reliable arc stability reduces operator fatigue and improves first-pass acceptance rates
• Minimal spatter means less grinding and cleanup—shops see immediate labor savings
• Consistent results build customer confidence and reduce callback risk

Technical Specifications

Parameter	Value
Diameter	1.2 mm
Length per Spool	1 M
Package Dimensions	13.5 cm (L) × 2.5 cm (W)
Weight per Spool	5 kg
AWS Classification	A5.9 ER308LSi
ISO/EN Standard	14343-B-SS308LSi
JIS Classification	Z3321 Y308LSi
GB Standard	GB 4241/2 H03Cr21Ni10Si1
Base Material	18Cr-8Ni Austenitic Stainless Steel

Chemical Composition (%)

Element	Content	Element	Content
Carbon (C)	0.023	Manganese (Mn)	2.20
Silicon (Si)	0.75	Chromium (Cr)	19.80
Nickel (Ni)	10.54	Molybdenum (Mo)	0.36
Phosphorus (P)	0.018	Sulfur (S)	0.011

Primary Applications

• Petrochemical equipment – corrosion-resistant joints in process piping and vessel shells
• Pressure vessel fabrication – low-carbon composition prevents intergranular corrosion in thick-section welds
• Food processing machinery – stainless sanitary equipment requiring aesthetic and hygienic welds
• Medical equipment – compatible with biomedical-grade stainless where material traceability is essential
• General austenitic joining – repair and fabrication of SUS 304L, 308, and similar 18-8 stainless materials

Reseller Value Statement

Stock ER308LSi alongside higher-molybdenum corrosion-resistant alternatives to cover the full spectrum of stainless TIG applications. The 1.2 mm diameter offers faster deposition rates than smaller gauges, improving shop productivity while the 5 kg spool format balances inventory turnover with bulk-order economics. This is the workhorse stainless rod for shops building their core consumable range.

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Ready to add stainless TIG capability to your catalog? This rod ships in quantities supporting both retail and shop direct-supply channels.