Stainless Steel MIG & TIG Welding Wire

Stainless Steel MIG & TIG Welding Wire

Stainless steel MIG and TIG welding wires are solid filler metals that can join austenitic, ferritic, martensitic, and duplex stainless steel grades with the appropriate filler selection. These wires match or slightly over-alloy the chemistry of the base metal to produce welds that resist corrosion and hold up under service conditions.

Stainless steel MIG and TIG wires are highly resistant to intergranular corrosion, low carbon pickup, and clean weld bead profiles. Low-carbon (L) grades reduce the risk of carbide precipitation in the heat-affected zone. Silicon-bearing variants improve wetting and arc stability during MIG welding.

Engineers choose stainless steel MIG and TIG wires when the welded joint must retain full corrosion resistance after fabrication. These wires allow the weld metal to match the base material in strength, ductility, and chemical resistance. This is critical in process piping, pressure vessels, and equipment exposed to acids, chlorides, or high temperatures.

Common applications include food and beverage processing, pharmaceutical equipment, chemical reactors, heat exchangers, power plant piping, pulp and paper machinery, and offshore platforms. These wires also serve in cryogenic systems and nuclear fabrication with strict weld quality standards.

At Nicorex Alloys, we stock a wide range of stainless steel MIG and TIG welding wires at our Mumbai facility. As a supplier and stockist, we source these products from recognised global producers and supply them to fabrication shops, EPC contractors, and plant operators across India.

Complete Range of Stainless Steel MIG & TIG Welding Wire

The following grades cover the most widely used stainless steel MIG and TIG wires for industrial welding.
Product Grade Best Metals They Can Weld Reason
AWS Class ER308L/308LSi/308H MIG & TIG
AWS Class ER308L/308LSi/308H MIG & TIG
AISI 304, 304L, 304H stainless steel Matching chemistry provides full corrosion resistance in standard austenitic grades
AWS Class ER309/309L/309LSi MIG & TIG
AWS Class ER309/309L/309LSi MIG & TIG
Dissimilar joints between stainless and carbon steel Higher chromium and nickel content compensates for dilution from carbon steel
Alloy 309LMo MIG & TIG
Alloy 309LMo MIG & TIG
Dissimilar joints needing added pitting resistance Molybdenum addition improves resistance to chloride attack at the fusion zone
AWS Class ER310 MIG & TIG
AWS Class ER310 MIG & TIG
AISI 310, 310S high-temperature stainless steel Matches the 25Cr-20Ni composition for service up to 1100 degrees C
AWS Class ER312 MIG & TIG
AWS Class ER312 MIG & TIG
Dissimilar and hard-to-weld stainless combinations High ferrite content reduces hot cracking in mixed-alloy welds
AWS Class ER316L/316H/316LSi MIG & TIG
AWS Class ER316L/316H/316LSi MIG & TIG
AISI 316, 316L, 316H molybdenum-bearing stainless steel Molybdenum provides pitting and crevice corrosion resistance in chloride environments
AWS Class ER317L MIG & TIG
AWS Class ER317L MIG & TIG
AISI 317L stainless steel Higher molybdenum than 316L for improved resistance in aggressive chemical service
AWS Class ER320LR MIG & TIG
AWS Class ER320LR MIG & TIG
Alloy 20 (CN-7M) stainless steel Matched composition resists sulfuric acid and mixed-acid environments
AWS Class ER330 MIG & TIG
AWS Class ER330 MIG & TIG
AISI 330 and high-nickel heat-resistant alloys High nickel and chromium provide stability under thermal cycling above 1100 degrees C
AWS Class ER347 MIG & TIG
AWS Class ER347 MIG & TIG
AISI 347, 321 stabilised stainless steels Niobium stabilisation prevents intergranular corrosion in high-temperature service
AWS Class ER385 MIG & TIG
AWS Class ER385 MIG & TIG
Alloy 904L (UNS N08904) super austenitic stainless steel High nickel, chromium, and molybdenum match 904L for strong acid resistance
AWS Class ER410 MIG & TIG
AWS Class ER410 MIG & TIG
AISI 410, 410S martensitic stainless steel Matching 12% chromium deposit for moderate corrosion and wear resistance
AWS Class ER410NiMo MIG & TIG
AWS Class ER410NiMo MIG & TIG
CA6NM and 410NiMo castings and wrought components Nickel and molybdenum additions improve toughness and corrosion resistance over standard 410
AWS Class ER630 MIG & TIG
AWS Class ER630 MIG & TIG
17-4 PH (AISI 630) precipitation-hardening stainless steel Matched composition allows post-weld age hardening to restore full strength

Quick Selection Matrix

Use this table to choose the right stainless steel MIG or TIG wire based on the metal you are welding.
Base Metal Being WeldedRecommended WireAWS ClassWhy This Choice
AISI 304L PipingER308L MIG & TIGER308LLow carbon deposit prevents sensitisation in 304L welds
Carbon Steel To 316L Stainless JointER309L MIG & TIGER309LOver-alloyed filler compensates for dilution at the dissimilar interface
AISI 316L Vessel ShellsER316L MIG & TIGER316LMolybdenum-bearing deposit matches base metal pitting resistance
Alloy 904L Reactor LiningER385 MIG & TIGER385High Mo and Ni content matches 904L for sulfuric and phosphoric acid service
AISI 347 Superheater TubesER347 MIG & TIGER347Niobium stabilisation prevents carbide precipitation during elevated temperature operation
17-4 PH Turbine ComponentsER630 MIG & TIGER630Allows precipitation hardening after welding to restore high tensile strength
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