30 Week 3 Labs
T-Joint 4F Multi-Pass GMAW
Setup
Materials required are two steel plates, each with thickness between 16 gauge and 1/8″ and measuring 1.5″ x 8″.
Position required is 4F.
Work
Create a t-joint with the given materials. Complete three passes total with one stop/start in the middle.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- No undercut
- Complete penetration
- No porosity
Lap Joint 1F GMAW
Setup
Materials required are two steel plates, each with thickness between 16 gauge and 1/8″ and measuring 1.5″ x 8″.
Positions allowed are 1F or 2F.
Work
Create a lap joint with the given materials.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- No undercut
- Complete penetration
Beads on Plate 1G Aluminum
Setup
Materials required are a single 1/4″ thick aluminum plate measuring 4″ by 5″. You may use a spool gun or a push-pull gun for this lab.
Position required is 1G.
Work
Run surfacing beads to fill up the plate, then turn the plate 90° and run surfacing beads again. You must finish with two layers on the plate.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- Good overlap
- Consistent starts and stops
