Filler metals containing additional deoxidizers are intended for use on which type of steels?

Filler metals containing additional deoxidizers are intended for use on which type of steels?

• A. Moderately Rusty Low-Carbon Steels
• B. Alloy Steels Containing Chromium
• C. Non-Ferrous Metals
• D. Stainless Steels With More Than 18% Chromium

Answer: (A)

Filler metals with added deoxidizers are used when the base metal surface has oxide films from rust or scale. The deoxidizers in the filler (like silicon, manganese, or aluminum) react with the oxygen in the molten weld pool and form oxides that stay in the slag or become part of the weld, preventing porosity and improving fusion. This makes them especially helpful for moderately rusty low-carbon steels, where the surface oxide is more likely to cause defects during welding. For highly alloyed chromium-containing steels or stainless steels, you typically use fillers that are specifically designed for those alloys, and excess deoxidizers can actually cause problems with corrosion resistance or unwanted inclusions. Non-ferrous metals aren’t steels, so the same approach doesn’t apply.

Filler metals with added deoxidizers are used when the base metal surface has oxide films from rust or scale. The deoxidizers in the filler (like silicon, manganese, or aluminum) react with the oxygen in the molten weld pool and form oxides that stay in the slag or become part of the weld, preventing porosity and improving fusion. This makes them especially helpful for moderately rusty low-carbon steels, where the surface oxide is more likely to cause defects during welding.

For highly alloyed chromium-containing steels or stainless steels, you typically use fillers that are specifically designed for those alloys, and excess deoxidizers can actually cause problems with corrosion resistance or unwanted inclusions. Non-ferrous metals aren’t steels, so the same approach doesn’t apply.