Hobart Welding Products OM-240 438B manual Butt Joints, Lap Joint, Tee Joint

14-9. Butt Joints

1

2

1/16 in. 30° (1.6 mm)

3 4

1 Tack Welds

Prevent edges of joint from draw- ing together ahead of electrode by tack welding the materials in posi- tion before final weld.

2 Square Groove Weld

Good for materials up to 3/16 in. (5 mm) thick.

3 Single V-Groove Weld

Good for materials 3/16 − 3/4 in. (5-19 mm) thick. Cut bevel with oxyacetylene or plasma cutting equipment. Remove scale from material after cutting. A grinder can also be used to prepare bevels.

Create 30 degree angle of bevel on materials in V-groove welding.

4 Double V-Groove Weld

Good for materials thicker than 3/16 in. (5 mm).

S-0062

14-10. Lap Joint

30°	30°
	Or Less
Or Less
1	1

1Electrode

2Single-Layer Fillet Weld Move electrode in circular motion.

3Multi-Layer Fillet Weld

Weld a second layer when a heavi- er fillet is needed. Remove slag be- fore making another weld pass. Weld both sides of joint for maxi- mum strength.

2 3

S-0063 / S-0064

14-11. Tee Joint

1

45°

2 Or 2 Less

		1	Electrode
		2	Fillet Weld
		Keep arc short and move at defi-
		nite rate of speed. Hold electrode
		as shown to provide fusion into the
		corner. Square edge of the weld
		surface.
		For maximum strength weld both
		sides of upright section.
	1	3	Multi-Layer Deposits
		Weld a second layer when a heavi-
		er fillet is needed. Use any of the
		weaving patterns shown in Section
3		14-8. Remove slag before making
		another weld pass.

S-0060 / S-0058-A / S-0061

OM-240 438 Page 61