Exam 26: Filler Metal Selection

____ is a popular agricultural filler wire that can be used in single- or multiple-pass welds in all positions.

As the percentage of phosphorus decreases, it can cause weld brittleness, reduced shock resistance, and increased cracking.

A(n) ____________________ is the primary metal source for a weld.

The most widely used numbering and lettering system is the one developed by the American Society for Testing and Materials (ASTM).

One function of a flux covering is to serve as most of the filler metal in the finished weld.

The number 4 in an E704X means ____.

____ electrodes are designed to be used with DCEP polarity and have an organic-based flux (cellulose, C₆H₁₀O₅).

____ is the impact load required to break a test piece of weld metal.

For fabricating structural and low alloy steels, the core wires of the electrode use inexpensive rimmed or low carbon steel.

____ is the percentage that a 2-in. (51-mm) piece of weld will stretch before it breaks.

____________________ is the most commonly used electrode for agricultural welding.

Welding fluxes do not affect the penetration and contour of the weld bead.

____ aluminum has the lowest percentage of alloy agents of all of the aluminum alloys, and it melts at 1215 degrees F (657 degrees C).

Information given by manufacturers include preheating and postheating temperatures.

As the percentage of chromium increases, tensile strength, hardness, and corrosion resistance increase with some decrease in ductility.

Information given by manufacturers include the number of welding electrodes per pound.

____ is the load in pounds that would be required to break a section of sound weld that has a cross-sectional area of 1 sq in.

The prefix ____________________ indicates a filler metal that is supplied for use as either a current-carrying electrode or in rod forms.

The prefix letter ____________________ indicates an arc welding electrode.

Shielded metal arc welding electrodes, sometimes referred to as welding rods, arc welding rods, stick electrodes, or simply electrodes, have four parts.