How wide is a stringer bead in relation to the electrode?

For a stinger, the bead width should be 2 or 3 times the diameter of the electrode. A weave bead is not recommended to be 6 times bigger than the electrode diameter.

How wide should a stringer bead be for a 1/8 3.2 mm diameter electrode?

For example, a stringer bead made with a 1/8″ (3.2 mm) diameter electrode should be about 1/4″–3/8″ (6.4 mm–9.6 mm) wide. The height of the weld bead should be approximately 1/32″–3/64″ (0.8 mm–1.2 mm).

What is the distance from the metal that you keep an 1/8 inch electrode from the metal?

In SMAW welding (shielded metal arc welding) with a flux coated electrode on mild steel, the gap is close to the diameter of the filler metal in the rod. A 1/8 inch rod (the metal “core”) you will want to be about an eighth of an inch from the base metal.

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Why must electrode holder be sized?

Why must the electrode holder be correctly sized? Electrode holders are designed to be used at the maximum amperage rating or less and too high amperage will cause the holder to overheat and burn up. But if the holder is too large for the amperage range being used, manipulation is hard, and operator fatigue increases.

What is the angle of the electrode with the base metal in doing stringer bead in flat position?

Maintain an electrode angle of 10 to 15 degrees. Use a dragging motion, with very little side to side motion. 6. Each stringer bead should be about 2 to 3 times the diameter of the electrode wire.

Will help prevent undercutting?

Undercutting can often occur at the root pass of a welded point. The way to prevent this from occurring is to not push the electrode in too far when performing the root pass on a pipe.

Why is it advisable to wear earplugs for out of position welding?

The heat of the arc will cause chlorinated hydocarbons used in solvents to form______, a deadly gas. Why is it advisable to wear earplugs for out-of-position welding? … A welder may scratch the electrode on the metal and then withdraw it. A straight up-and-down or pecking motion may also be used.

Why my welder won’t strike an arc?

One of the most common reasons your welder won’t spark is because the connection points between the welder and the metal pieces are not clean or clear. This means that both the workpiece where you want to form an arc as well as the connection point for the work lead clamp need to be bare metal.

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What is the ideal arc length?

As a good starting point, arc length should not exceed the diameter of the metal portion (core) of the electrode. For example, an 1/8-inch 6010 electrode is held about 1/8 inch off the base material. … Too long of an arc length will create excess spatter in the weld joint. There is also a high potential for undercut.

Can you hold a welding rod while welding?

You can hold the electrode when stick welding (SMAW) for a short time to improve the electrode’s stability when striking the arc or making a few tack welds. When doing so, you must wear dry welding gloves in good condition.

What is the acceptable width of the bead in a weld metal?

This helps to minimize distortion by limiting the volume of weld metal and reducing the heat input. The maximum bead width should be limited to 3/8 in. (10 mm). As a minimum, one complete circumferential bead should be completed before stopping or interrupting the welding sequence.

What determines the size and rating of the electrode holder?

Electrode holders are available in different sizes and are rated on their current carrying capacity. 2. … Connections at the electrode holder, the ground clamp, and at the power source lugs must be soldered or well crimped to assure low electrical resistance.

How much should stringer beads overlap on a filler pass?

Filler passes are made with Stringer beads or weave beads. They should overlap enough so that the finished bead is smooth. Stringer beads usually overlap about 50% and weave beads overlap approximately 25%. Each weld bead must be cleaned before the next bead it started.

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What distance is a 3/32 electrode held from the base metal?

It is tapered and blunted. What distance is a 3/32″ (2.4 mm) electrode held from the base metal? 70% of the heat in the GTAW arc is released on the work when DCEP polarity is used.

How is weld bead profile assessed?

Using these various measurement modes properly allows shape inspection of welds and weld joints of different workpieces.

  1. HEIGHT. …
  2. WIDTH AND POSITION. …
  3. ANGLE AND INTERSECTION. …
  4. MASTER PROFILE COMPARISON. …
  5. HEIGHT DIFFERENCE. …
  6. CROSS SECTIONAL AREA. …
  7. DISTANCE (POINT – POINT) …
  8. RADIUS AND MIDPOINT.