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Filler Metals & Consumables Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Filler Metals & Consumables flashcards as text

  1. An E6010 electrode is preferred over E6013 for pipeline root passes primarily because it:

    Answer: Penetrates through mill scale and contamination with a stiff arc

    E6010 uses a high-cellulose sodium coating that produces a forceful, digging arc capable of penetrating contaminated or tight-fit root gaps.

  2. What is the maximum allowable moisture content for low-hydrogen SMAW electrodes stored out of the original hermetically sealed container, per AWS D1.1?

    Answer: They must be used within 4 hours or returned to oven at 250–300°F

    AWS D1.1 requires low-hydrogen electrodes exposed to atmosphere to be used within 4 hours or reconditioned in a holding oven at 250–300°F (121–149°C).

  3. Which AWS A5 specification covers filler metals for brazing?

    Answer: AWS A5.8

    AWS A5.8 covers filler metals for brazing and braze welding, including silver, copper, and aluminum-based alloys.

  4. A flux-cored wire marked 'E71T-8' is intended for use with:

    Answer: No external shielding gas (self-shielded)

    The 'T-8' designation in AWS A5.20 identifies a self-shielded flux-cored electrode that generates its own shielding from the flux core.

  5. When selecting a filler metal for welding 4130 chromoly steel in aerospace applications, the H4 diffusible hydrogen designator means the weld metal hydrogen content must not exceed:

    Answer: 4 mL per 100 g of weld metal

    The H4 suffix per AWS A4.3 limits diffusible hydrogen to a maximum of 4 mL per 100 g of deposited weld metal.

  6. Which factor most directly determines whether a SAW flux is classified as 'fused' or 'bonded'?

    Answer: The method of manufacture (melted vs. agglomerated with binder)

    Fused fluxes are produced by melting and solidifying ingredients, while bonded (agglomerated) fluxes are made by mixing dry ingredients with a liquid binder and then baking.

  7. In GTAW of titanium, why must the filler rod be kept within the inert gas shielding zone during welding?

    Answer: To prevent the rod from oxidizing and introducing oxygen or nitrogen contamination into the weld pool

    Titanium is highly reactive at elevated temperatures; exposing the hot filler rod to air causes oxide and nitride pickup that embrittles the weld.