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Zinc Aluminum Alloy Coated Steel

Zinc Aluminum Alloy Coated Steel. 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. Zinc Aluminum Alloy Coatings. Applied by Hot Dipping

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Zinc Aluminum Alloy Coated Steel

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  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, 0.1%Mg 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

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