Stainless steel filler metal is used in welding processes to join stainless steel components together. It comes in several forms, including rods, wires, and flux-cored wires, and is designed to have similar properties to the base metal to ensure a strong and durable weld.

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Common Stainless Steel Welding Filler Metal 

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• 308L Welding Filler Metal:

  • Composition: Primarily 18% chromium and 8% nickel.

  • Use: Best for welding 304 and 304L stainless steels.

  • Characteristics: Good general-purpose filler metal with moderate corrosion resistance.

• 309L Welding Filler Metal:

  • Composition: Contains 24% chromium and 13% nickel.

  • Use: Suitable for welding dissimilar metals, such as stainless steel to carbon steel.

  • Characteristics: Offers good corrosion resistance and helps bridge differences in the base metals.

• 316L Welding Filler Metal:

  • Composition: Includes 16% chromium, 10% nickel, and 2% molybdenum.

  • Use: Ideal for welding 316 and 316L stainless steels, which are used in more corrosive environments.

  • Characteristics: Provides enhanced corrosion resistance, particularly in marine and chemical

• Duplex Welding Filler Metal:

  • Composition: Includes both austenitic and ferritic phases.

  • Use: For welding duplex stainless steels, which offer high strength and corrosion resistance.

  • Characteristics: Designed for high-stress applications and environments prone to corrosion.

• Super Duplex Welding Filler Metal:

  • Composition: Higher alloy content than duplex.

  • Use: For welding super duplex stainless steels, which are used in highly corrosive environments.

  • Characteristics: Provides superior strength and resistance to corrosion.​

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When selecting a filler metal, consider the base metal composition, welding process, and the specific requirements of the application, such as strength, ductility, and resistance to various types of corrosion. Contact us for a technical review and recommendation for the suitable filler metal.