309H Welding Wire for High-Temp Steel

Domestic Market

309 / 309HStainless Steel Filler Wire

309 / 309H welding wire is designed for welding high-carbon and high-chromium nickel stainless steels used in high-temperature service. This product is commonly used for welding AISI 309H stainless steel and similar grades where strength, creep resistance, and thermal stability are required. With controlled carbon content, it delivers improved tensile strength at elevated temperatures and supports reliable welding of both similar and dissimilar materials. The product is also suitable for applications that demand high deposition efficiency and consistent weld quality.

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Key Features and Benefits

309 / 309H welding wire is developed to meet the requirements of high temperature and heavy-duty industrial applications.

Designed For High Temperature Service The controlled carbon content helps provide higher tensile and creep strength at elevated operating temperatures.
Suitable For High Chromium Stainless Steels Ideal for welding 24 percent chromium and 12 percent nickel stainless steels such as AISI 309H.
Reliable For Dissimilar Metal Welding It can be used for joining stainless steel to carbon steel or low alloy steel in construction and fabrication work.
High Deposition Efficiency Supports faster welding with consistent metal transfer, improving productivity in joint welding.
Stable Arc Performance Precision layer wound wire ensures smooth feeding and stable arc behavior during welding.
Strong Mechanical Properties Produces weld metal with good strength, ductility, and impact resistance.

These features make 309H welding wire suitable for demanding fabrication environments.

Specifications

The table below provides the key mechanical properties and welding conditions of 309 / 309H welding wire.

SUPERMIG 309/309H	AWS/SFA	Yield Strength N/mm2	Tensile Strength N/mm2	Elongation A5(%)	Impact Energy ISO-V(J) 20° C	Welding Conditions
SUPERMIG 309/309H	AWS A5.9: ER 309/309H EN ISO 14343-A: G 23 12 H	≥ 400	≥ 550	≥ 30	≥ 80	DC+

TYPE OF PACKING :

SD 300 / BS 300	11.34 Kgs/ 25 Lbs, 15 Kgs/ 30 Lbs/ 33lbs Layer Wound Plastic/ Metallic Spool.
SD 200	4.54 Kgs/ 10 Lbs Layer Wound Plastic Spool.
SD 100	0.700 Kgs/0.910 /2 lbs Layer Wound Plastic Spool.
Mig Wire in Drum	In Drums of 100-250 Kgs (200-550 Lbs)

Properties of 309 / 309H

Superon 309 and 309H welding consumables are austenitic stainless steel electrodes and filler wires designed for high-performance welding applications, particularly where dissimilar metals or high-temperature service is involved. They are widely used in chemical, petrochemical, power generation, and industrial fabrication environments.

Austenitic Stainless Steel Weld Metal: Provides stable, ductile welds with excellent toughness, suitable for both fabrication and repair of stainless steel and carbon steel components
High-Temperature Performance: 309H contains higher carbon content to maintain strength at elevated service temperatures without compromising corrosion resistance.
Corrosion Resistance: Offers good resistance to general corrosion, pitting, and oxidation in mildly aggressive environments.
Crack Resistance: Low susceptibility to hot cracking during welding due to controlled ferrite content, making it ideal for joining dissimilar metals or overlay applications.
Mechanical Strength: Delivers high tensile and yield strength while maintaining ductility and toughness, ensuring welded joints withstand stress, vibration, and thermal expansion.
Smooth and Uniform Weld Beads: Produces clean, consistent welds with excellent wetting and minimal spatter, reducing post-weld finishing.
Stable Arc Performance: Provides reliable welding performance in MIG, TIG, and stick processes, ensuring consistent penetration and metal transfer.
Versatile Applications: Ideal for overlay welding, joining stainless to carbon steels, industrial fabrication, chemical processing equipment, and maintenance welding.