28 Week 1 Lab

Use a mixture of 75% argon and 25% carbon dioxide gas when welding with steel for these labs.

Stringer Beads All Positions GMAW

Setup

Materials required are a single 3/16″ to 3/8″ thick steel plate measuring 3″ by 6″.

Positions required are 1G, 2G, 3G, and 4G.

Work

Weld 2 layers of surfacing beads on the plate. Each pair of layers should be completed in a different position.

Acceptance Criteria

• Consistent weld
• Good tie-ins
• No undercut
• Complete penetration
• Half overlap over previous weld bead