Zinc%20Aluminum%20Alloy

1
Zinc Aluminum Alloy Coated Steel
2
Resistance Welding

• Learning Activities
• View Slides
• Read Notes,
• Listen to lecture
• Do on-line workbook

• Lesson Objectives
• When you finish this lesson you will understand

Keywords
3
Zinc Aluminum Alloy Coatings
Applied by Hot Dipping Al Durability in
Industrial Atmospheres Zn Formability and
galvanic protection
Galfan Type I 5 Aluminum, 95 Zinc, misch
metal Type II 5 Aluminum, 95 Zinc, 0.1Mg 12
coating weights GF235 2.35 oz/sq ft,
through GF30 0.30 oz/sq ft
Galvalume 55 Aluminum, 1.5 Silicon, 43.5
Zinc A250 0.50 oz/sq ft (0.8 mil
thickness) A255 0.55 oz/sq ft A260 0.60
oz/sq ft
4
Typical Applications of Coated Steels

• Galvalume Galfan
• -- Roofing Siding
• -- Underbody Parts
• -- Exhaust Systems
• --Agricultural Equipment

5
Aluminum/ Aluminum Zinc Coating

• Need to brush oxide off surface
• Higher currents needed
• Reduced Electrode life

6
Zinc Aluminum Alloy
Conventional Galvanized
Galvalume
Galfan
Wider Face 4 to 5 times base metal thickness
Dispersion Strengthened Electrode preferred
7
AWS Welding Handbook
8
Weld Time (cycles)
Hot Dipped Galvanized
AWS Welding Handbook
9
Seam Welding

• Slightly Higher Currents
• Lower Electrode Forces

AWS Welding Handbook
10
AWS Welding Handbook
11
Homework
Term Paper Research Proposal