GMAW Stuff

Question 1

Fillet weld parameters includes:

Answer 1

Current setting – Correct amperage for material and electrode

Electrode inclination (travel angle) – Wrist up or down

Electrode angle (work angle) – Side-to-side angle, typically half of the included joint angle

Electrode stickout – ¼”–⅜” (6.4–10 mm)

Question 2

What are the key welding parameters for GMAW?

Answer 2

GMAW welding parameters include:

Shielding gas selection

Mode of metal transfer (short circuit, globular, spray, etc.)

Current type & polarity (typically DCEP)

Amperage / wire feed speed

Voltage setting

Correct wire type to match the base metal

Common wire size: 0.035 in

Lap joint (fillet) preparation:

1/8 in (3.2 mm) overlap

Question 3

Grove weld parameters

Answer 3

Bevel both edges to 30o should form 60o degree bevel/fited. File a land/root face to 1/16th 0mm/1.6mm (1G vee grove ¾ passe). Gap between plates 1/8th to 5/32 gap 3.2mm 4.0mm. Tacks should be 1/4th one quarter to 3/8ths long.

Question 4

Stringer bead

Answer 4

Single pass of weld in one direction only, no side to side movement.

Question 5

Electrode angle

Answer 5

45o to the horizontal plane /bead can sometimes be 90o degrees.

Question 6

How is work positioned for a 1f tee joint

Answer 6

Each member at 45 to the horizontal plane.

Question 7

2G with vee grove

Answer 7

Use stringer beads on all fill and cover passes working bottom upwards.

Question 8

Single v prep on pipe

Answer 8

Generally have an included angle of 60o to 70o degrees.

Question 9

Maximum length of tacks on pipe

Answer 9

¾ three quarters.

Question 10

Where are tacks located on 6inch pipe sch80

Answer 10

12, 3, 6 and 9 oclock.

Question 11

What is the root gap between the test plates for a CWB 2G test weld

Answer 11

5/16th 8mm.

Question 12

How far are the stop and starts/from the edge/ on a CWB 4GF test weld

Answer 12

1,½ inch and a half 38mm.