DIPTI METAL INDUSTRIES
DIPTIINOX® ER309LSi TIG Rod (AWS A5.9): Leading High-Silicon Manufacturer & Exporter for Fluid Dissimilar Welds
Dipti Metal Industries is a Leading ER309LSi TIG Rod Manufacturer and High-Silicon Dissimilar Metal Welding Wire Exporter in Mumbai, India, specializing in high-performance AWS A5.9 ER309LSi GTAW filler metal under the DIPTIINOX® brand. The 'LSi' grade combines the high alloy content of ER309 (23% Chromium and 13% Nickel) for superior dilution control with a very low carbon (0.03% maximum) for post-weld heat treatment tolerance, and a high silicon content (0.65% to 1.00%). This increased silicon is key for TIG welding, as it provides a highly fluid weld pool, exceptional arc stability, and excellent bead wetting and contouring. This makes ER309LSi the premium choice for intricate or automated TIG welding of dissimilar metals (carbon/low-alloy steel to stainless steel) and as a cladding barrier layer in corrosion-critical applications. We guarantee full conformance to AWS A5.9 for critical industrial applications globally.
DIPTIINOX® ER309LSi: The TIG-Optimized Grade for Superior Weld Quality in Dissimilar Joints
The AWS A5.9 ER309LSi Filler Metal is the specialized variant of the ER309L line, developed specifically to maximize arc performance and bead appearance. It retains the essential core benefits: the high alloy (23Cr-13Ni) content for blending with carbon steel, and the low carbon (L) for preventing intergranular corrosion after thermal exposure (PWHT). The distinguishing factor is the elevated Silicon (Si) level. This silicon acts as a deoxidizer and significantly lowers the surface tension of the molten weld pool, dramatically improving puddle flow and wetting, which is invaluable for professional TIG welders seeking defect-free, smooth, and contoured weld beads, particularly in pipe and pressure vessel fabrication.
Key Features, Benefits, and Conformances of ER309LSi TIG Rods
Key Features & Service Performance (As per Datasheet)
- High-Silicon (Si) Content: Optimized for improved puddle fluidity, wetting, and smoother bead appearance in TIG (GTAW) welding.
- Low-Carbon Content: Carbon restricted to 0.03% max for exceptional resistance to weld decay after heat treatment.
- Primary Use: Welding dissimilar materials (Mild/Low-Alloy Steel to Stainless Steel) that require superior weld bead quality and PWHT.
- Dilution Control: High Cr/Ni content provides excellent tolerance to dilution from carbon steel.
- Cladding: Premium barrier/buttering layer in multi-pass stainless steel weld overlays for critical pressure vessel construction.
International Conformances and Quality
- Form: Solid Rod for TIG (GTAW).
- Finish: Bright finish, essential for high-purity TIG welding applications.
AWS A5.9 ER309LSi - Chemical Composition and Mechanical Properties
AWS Chemical Composition Requirements (%)
| C max | Cr | Ni | Mo max | Mn | Si | P max | S max | Cu max |
|---|---|---|---|---|---|---|---|---|
| 0.03 | 23.0 – 25.0 | 12.0 – 14.0 | 0.75 | 1.0 – 2.5 | 0.65 – 1.00 | 0.03 | 0.03 | 0.75 |
Deposited Chemical Composition % (Typical)
| C | Cr | Ni | Mo | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|
| 0.019 | 23.50 | 12.95 | 0.15 | 1.85 | 0.84 | 0.008 | 0.006 |
Mechanical Properties (R.T.) of Deposited All Weld Metal (Typical)
| Yield Strength (psi) | Tensile Strength (psi) | Elongation % | Reduction of Area % |
|---|---|---|---|
| 60,500 | 89,000 | 35% | 60% |
Data is typical for ER309LSi weld metal deposited by TIG (GTAW) using 100% Argon as the shielding gas.
Welding Parameters, Diameter Range, and Packaging Options
Our ER309LSi TIG Rod is specifically designed for exceptional performance with the Gas Tungsten Arc Welding (GTAW) process, where its enhanced fluidity is maximized.
Recommended Welding Parameters (GTAW - TIG Process) - DCSP
| Wire Diameter (in) | Wire Diameter (mm) | Amps (DCSP) | Volts | Shielding Gas |
|---|---|---|---|---|
| .035 | 0.9 | 60-90 | 12-15 | Argon 100% |
| .045 | 1.2 | 80-110 | 13-16 | |
| 1/16 | 1.6 | 90-130 | 14-16 | |
| 3/32 | 2.4 | 120-175 | 15-20 |
Note: Parameters are general guidance and are highly dependent upon plate thickness, welding position, and specific joint design.
Standard Diameters & Packaging (GTAW - TIG Rods)
| Diameter (in) | Diameter (mm) | Length (in) | Length (mm) | Packaging (kgs) |
|---|---|---|---|---|
| .030 | 0.8 | 36 | 914 | 5 kgs (Plastic Container) |
| .035 | 0.9 | 36 | 914 | 5 kgs (Plastic Container) |
| .045 | 1.2 | 36 | 914 | 5 kgs (Plastic Container) |
| 1/16 | 1.6 | 36 | 914 | 5 kgs (Plastic Container) |
| 3/32 | 2.4 | 36 | 914 | 5 kgs (Plastic Container) |
| 1/8 | 3.2 | 36 | 914 | 5 kgs (Plastic Container) |
| 5/32 | 4.0 | 36 | 914 | 5 kgs (Plastic Container) |
| 3/16 | 4.8 | 36 | 914 | 5 kgs (Plastic Container) |
Each 5 kgs quantity is packed in an air-tight polythene bag and then secured in a durable plastic container for export. AWS code is punched on each wire for clear identification.
Primary Applications for DIPTIINOX® ER309LSi TIG Rod
The ER309LSi filler metal is chosen where the combination of high dilution tolerance, low carbon corrosion resistance, and superior weldability is mandatory. Its key uses include:
- Precision Dissimilar Welding: TIG welding of carbon steel to stainless steel in critical applications, such as small diameter pipe or thin-walled tubing, where fine bead control is essential.
- Automated Cladding: Used in automated multi-pass weld overlay systems for pressure vessels and petrochemical equipment, where the high silicon ensures excellent tie-in and smooth inter-pass layers.
- Post-Weld Heat Treatment: Joining components that require PWHT, ensuring the low carbon content maintains the integrity of the weld and prevents sensitization.
- Chemical and Food Processing: Fabrication where the final weld appearance and clean bead profile are important for minimizing crevices and maximizing hygiene/corrosion resistance.
ER309LSi TIG Rods Global Export Markets: We are the Biggest Manufacturer Supplying from Mumbai, India
Dipti Metal Industries is a proud ER309LSi TIG Rod Exporter, ER309LSi TIG Rod Trader, and ER309LSi TIG Rod Distributors from our base in TIG rod manufacturer Mumbai, India. We serve as an ER309LSi manufacturer in Asia and a reliable ER309LSi manufacturer in Europe, ensuring timely and compliant delivery to major industrial hubs across over 190 countries globally.
Explore Our Extensive Global Reach (Illustrative Markets)
- USA: Houston, Los Angeles, New York, Chicago, New Orleans
- Canada: Calgary, Edmonton, Vancouver, Toronto, Montreal
- Mexico: Mexico City, Monterrey, Guadalajara, Veracruz
- Panama: Panama City, Colón
- Trinidad and Tobago: Port of Spain, San Fernando
- Costa Rica: San José, Puerto Limón
- Guatemala: Guatemala City, Puerto Quetzal
- Honduras: Tegucigalpa, San Pedro Sula
- Nicaragua: Managua, Corinto
- El Salvador: San Salvador, Acajutla
- Jamaica: Kingston, Montego Bay
- Dominican Republic: Santo Domingo, Santiago
- Cuba: Havana, Santiago de Cuba
- Bahamas: Nassau, Freeport
- Barbados: Bridgetown
- Haiti: Port-au-Prince
- Puerto Rico: San Juan
- Belize: Belize City
- Brazil: São Paulo, Rio de Janeiro, Salvador, Curitiba
- Argentina: Buenos Aires, Cordoba, Rosario
- Chile: Santiago, Valparaíso, Concepción, Antofagasta
- Colombia: Bogotá, Medellín, Cartagena, Barranquilla
- Peru: Lima, Callao, Arequipa, Trujillo
- Venezuela: Caracas, Maracaibo, Puerto La Cruz, Valencia
- Ecuador: Quito, Guayaquil, Manta, Esmeraldas
- Bolivia: La Paz, Santa Cruz, Cochabamba
- Uruguay: Montevideo, Salto
- Paraguay: Asunción, Ciudad del Este
- Guyana: Georgetown
- Suriname: Paramaribo
- Germany: Frankfurt, Hamburg, Munich, Düsseldorf, Berlin
- United Kingdom: London, Manchester, Aberdeen, Glasgow, Liverpool
- Netherlands: Rotterdam, Amsterdam, The Hague
- France: Paris, Marseille, Lyon, Le Havre, Bordeaux
- Italy: Milan, Rome, Genoa, Venice, Naples
- Spain: Madrid, Barcelona, Valencia, Bilbao, Seville
- Russia: Moscow, Saint Petersburg, Kazan, Novorossiysk, Sochi
- Poland: Warsaw, Krakow, Gdańsk, Wrocław
- Belgium: Antwerp, Brussels, Ghent, Zeebrugge
- Sweden: Stockholm, Gothenburg, Malmö, Uppsala
- Norway: Oslo, Bergen, Stavanger, Trondheim
- Finland: Helsinki, Tampere, Turku, Oulu
- Turkey: Istanbul, Ankara, Izmir, Adana
- Portugal: Lisbon, Porto, Sines
- Greece: Athens, Thessaloniki, Patras
- Ireland: Dublin, Cork
- Austria: Vienna, Salzburg, Linz
- Switzerland: Zurich, Geneva, Basel, Bern
- Czech Republic: Prague, Brno, Ostrava
- Romania: Bucharest, Cluj-Napoca, Constanța
- Ukraine: Kyiv, Kharkiv, Odesa, Lviv
- Hungary: Budapest, Debrecen, Szeged
- Croatia: Zagreb, Split, Rijeka
- Denmark: Copenhagen, Aarhus, Odense
- Slovakia: Bratislava, Košice, Žilina
- Lithuania: Vilnius, Kaunas, Klaipėda
- Latvia: Riga, Daugavpils, Liepāja
- Estonia: Tallinn, Tartu, Narva
- Bulgaria: Sofia, Plovdiv, Varna
- Serbia: Belgrade, Novi Sad
- Slovenia: Ljubljana, Maribor
- Cyprus: Nicosia, Limassol
- Malta: Valletta, Birkirkara
- Saudi Arabia: Riyadh, Jeddah, Dammam, Al Khobar, Jubail
- UAE: Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah
- Qatar: Doha, Ras Laffan
- Oman: Muscat, Sohar, Salalah
- Kuwait: Kuwait City, Ahmadi
- Bahrain: Manama, Sitra
- Iraq: Baghdad, Basra, Erbil
- Iran: Tehran, Mashhad, Bandar Abbas, Isfahan
- India: Mumbai, Delhi, Chennai, Kolkata, Bangalore, Hyderabad (Local Markets)
- China: Shanghai, Guangzhou, Tianjin, Shenzhen, Qingdao, Hong Kong
- Japan: Tokyo, Osaka, Nagoya, Yokohama, Kobe
- South Korea: Seoul, Busan, Ulsan, Incheon, Daegu
- Indonesia: Jakarta, Surabaya, Balikpapan, Medan
- Singapore: Singapore City
- Malaysia: Kuala Lumpur, Johor Bahru, Port Klang, Penang
- Thailand: Bangkok, Rayong, Laem Chabang, Chiang Mai
- Vietnam: Ho Chi Minh City, Hanoi, Da Nang, Haiphong
- Philippines: Manila, Cebu, Davao, Batangas
- Bangladesh: Dhaka, Chittagong, Khulna
- Pakistan: Karachi, Lahore, Islamabad, Faisalabad
- Taiwan: Taipei, Kaohsiung, Taichung
- Myanmar: Yangon, Mandalay
- Sri Lanka: Colombo, Kandy
- Kazakhstan: Nur-Sultan, Almaty, Atyrau
- Uzbekistan: Tashkent, Samarkand, Bukhara
- Jordan: Amman, Irbid, Zarqa
- Lebanon: Beirut, Tripoli
- Mongolia: Ulaanbaatar, Erdenet
- Nepal: Kathmandu, Biratnagar
- Yemen: Sana'a, Aden
- South Africa: Johannesburg, Durban, Cape Town, Sasolburg
- Nigeria: Lagos, Port Harcourt, Abuja, Kano
- Egypt: Cairo, Alexandria, Port Said, Suez
- Algeria: Algiers, Oran, Skikda
- Morocco: Casablanca, Rabat, Tangier
- Angola: Luanda, Lobito
- Kenya: Nairobi, Mombasa
- Tanzania: Dar es Salaam, Mwanza
- Ghana: Accra, Tema, Kumasi
- Mozambique: Maputo, Beira
- Cameroon: Douala, Yaoundé
- Libya: Tripoli, Benghazi
- Tunisia: Tunis, Sfax
- Ethiopia: Addis Ababa, Dire Dawa
- Australia: Sydney, Melbourne, Perth, Brisbane, Darwin, Adelaide
- New Zealand: Auckland, Wellington, Christchurch
- Papua New Guinea: Port Moresby, Lae
- Fiji: Suva, Nadi
- Zambia: Lusaka, Ndola
- Zimbabwe: Harare, Bulawayo
- Namibia: Windhoek, Walvis Bay
- Democratic Republic of Congo: Kinshasa, Lubumbashi
- Cote d'Ivoire: Abidjan
- Senegal: Dakar
- Mali: Bamako
- Malawi: Lilongwe, Blantyre
- Mauritius: Port Louis
- Reunion: Saint-Denis
Get a Quote Today for Your ER309LSi Filler Metal Requirements!
Are you searching to buy ER309LSi TIG Rod that is dependable, high-quality, and AWS A5.9 certified for your low-carbon, high-silicon dissimilar metal joints or stainless cladding projects? Contact Dipti Metal Industries, your expert biggest manufacturer and ER309LSi TIG Rod Manufacturer, Stainless Steel GTAW Filler Metal Supplier in Mumbai, India, today to discuss your specific requirements or to request a personalized, custom quote. Our team is dedicated to providing you with the most effective, safest, and most reliable DIPTIINOX® ER309LSi solutions.
Price guidance (non-binding): USD 8.00–60.00 per kg depending on grade, diameter, packaging (Spool/Coil/Tube), quantity, and delivery terms. Final prices are quotation-based.
ER309LSi TIG Rod & Wire — Frequently Asked Questions
The higher Silicon content (0.65% to 1.00%) improves the molten weld metal's fluidity (wetting action) and arc stability during welding. This is particularly advantageous for TIG (GTAW) welding, resulting in smoother bead profiles and easier control, especially for automated and high-speed applications.
ER309LSi should be used over ER309L when welding procedures demand a highly fluid, smooth-flowing weld puddle for enhanced aesthetics and superior bead contouring, while still requiring the low-carbon (0.03% max) content for post-weld heat treatment tolerance in dissimilar joints or cladding.
For most general and high-temperature services, the increase in silicon in ER309LSi does not significantly compromise the corrosion resistance, especially because the low carbon content maintains intergranular corrosion resistance. It is not generally recommended for applications exposed to very strong, hot oxidizing acids where the slightly lower nickel might be a concern.
While the wire specification covers multiple processes, the 'Si' version is especially favored for TIG (GTAW) and high-speed pulsed MIG (GMAW) welding due to the superior arc characteristics and bead appearance enabled by the higher silicon content.
Contact Dipti Metal Industries, Your ER309LSi TIG Rod Manufacturer, TIG Rod ER309LSi Exporter, TIG Rod ER309LSi Supplier in Mumbai, TIG Rod ER309LSi in India
Global export expertise: Seaworthy export packing • Line-wise bagging & tagging • Full documentation & TPI. We are a worldwide exporter of quality ER309LSi Filler Metal for export from Mumbai, India.