31 Week 4 Labs

Use a 100% argon gas when welding aluminum in these labs.

T-Joint Aluminum

Setup

Materials required are two aluminum plates, each with 1/4″ thickness and measuring 1″ x 5″. You may use a spool gun or a push-pull gun for this lab.

Position required is 2F.

Work

Create a t-joint with 5/16″ fillet welds. The joint should have a minimum of three welds. Be aware of not wasting material!

Acceptance Criteria

• Consistent weld
• Good tie-ins
• No undercut
• Complete penetration
• Minimum of three (3) welds on the single joint

Beads on a Tube

Setup

Materials required are a single 1/8″ thick aluminum round tube, 4″ long and with a 4″ or 5″ outer diameter. You may use a spool gun or a push-pull gun for this lab.

Positions required are 2G and 5G.

Work

On the tube, surfacing weld two layers in the 2G position and two layers in the 5G position.

Acceptance Criteria

• Consistent weld
• Good tie-ins
• No undercut
• Complete penetration
• No porosity
• Beads must overlap at least halfway onto previous bead