ER 312 is a high-ferrite stainless steel filler metal (wire/rod) used for welding difficult-to-join metals, especially dissimilar ones like carbon steel to stainless steel, offering excellent crack resistance due to its two-phase (austenite/ferrite) structure, strength, and good wear/corrosion properties, ideal for repair work, tools, and high-alloy builds.
Key Characteristics
High Ferrite Content: Produces a deposit with significant ferrite in an austenitic matrix, preventing cracks and fissures.
Dissimilar Metal Welding: Excellent for joining carbon steel to stainless steel or other high-nickel alloys.
Versatile: Used for GMAW (MIG), GTAW (TIG), and Submerged Arc welding.
Strength & Toughness: Provides high tensile strength, good ductility, and toughness at cryogenic temperatures.
Common Applications
Repairing tools, dies, and high-alloy parts.
Welding armor plates and spring steels.
Build-up and overlay applications.
Joining stainless steels to other alloys where strength is critical.
Important Consideration
When welding similar cast alloys, limit the weld to two or three layers to maintain desired properties.
ER 312 is a high-ferrite stainless steel filler metal (wire/rod) used for welding difficult-to-join metals, especially dissimilar ones like carbon steel to stainless steel, offering excellent crack resistance due to its two-phase (austenite/ferrite) structure, strength, and good wear/corrosion properties, ideal for repair work, tools, and high-alloy builds.
Key Characteristics
High Ferrite Content: Produces a deposit with significant ferrite in an austenitic matrix, preventing cracks and fissures.
Dissimilar Metal Welding: Excellent for joining carbon steel to stainless steel or other high-nickel alloys.
Versatile: Used for GMAW (MIG), GTAW (TIG), and Submerged Arc welding.
Strength & Toughness: Provides high tensile strength, good ductility, and toughness at cryogenic temperatures.
Common Applications
Repairing tools, dies, and high-alloy parts.
Welding armor plates and spring steels.
Build-up and overlay applications.
Joining stainless steels to other alloys where strength is critical.
Important Consideration
When welding similar cast alloys, limit the weld to two or three layers to maintain desired properties.
Additional Information
Delivery Time3 - 4 Days
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GST No. 27AABCS4962M1ZV
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Mumbai, Maharashtra 
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