The document discusses various substrates and materials used for roofing and cladding including coated carbon steel, galvanized steel, galvalume, aluminum alloys, and steel grades and gauges. It provides details on hot dipped galvanized steel, galvalume, and compares the corrosion resistance of galvanized steel versus galvalume. Aluminum alloys such as 3003, 3004, 3105 and 5052 are outlined along with standard tempers and thicknesses used for roofing products.

1. “Material and Substrates”

2. Substrates Coated Carbon Steel Hot Dipped Galvanized G-90 Galvalume AZ50 AZ55 Aluminum Alloy 3003, 3004, 3105, 5052 Temper, H14, H24, H34

3. Steel Material Thickness Material thickness of steel is referred to as Gauge (GA). Gauge is the two digit number that relates to the thickness of the steel sheet in decimal inches. The larger the Gauge number, the thinner the sheet. Example Tolerances: 26 Gauge = .016” to .020” 24 Gauge = .021” to .027” 22 Gauge = .027” to .033”

4. Steel Material Thickness Material thickness of steel is referred to as Gauge (GA). Gauge is the two digit number that relates to the thickness of the steel sheet in decimal inches. The larger the Gauge number, the thinner the sheet. Purchased Thickness: 26 Gauge = .018” 24 Gauge = .023” 22 Gauge = .0296”

5. Steel Grades Material grade is determined by “Yield Strength” (Hardness) Examples: Panel SteelGradeYield 26 Gauge = 50 50KSI 26 Gauge = 80 80KSI 24 Gauge = 50 50KSI Trim SteelGradeYield 26 Gauge = 50 50KSI 24 Gauge = 50 50KSI Note: 1,000 PSI = 1 KSI

7. Great Sacrificial Advantages

8. Hot Dipped Galvanized offers a desirable characteristic with respect to corrosion by sacrificing itself to protect slit edges and scratches.

9. No applicable corrosion warranty

10. Generally has a smoother surface for paint application purposes.

12. By volume consists of a minimum thickness of .50 oz per Sq Ft of AL/Zn for both sides of the steel sheet.

13. 20 year 6 month warranty against substrate corrosion

14. 25 year warranty for AZ55 ACG

15. Great Corrosion Properties

17. Galvalume vs. Galvanized Moderate Marine / Rural Hot Dipped Galvanized After 18 years, G-90 Galvanized exhibits red rust Galvalume Galvalume after 23 years – No major sign of red rust.

18. Galvalume vs. Galvanized Salt Spray Corrosion Resistance With cut edges protected, the coating on Galvalume AZ50 lasts 5 to 10 times longer than the coating on G90 Hot Dipped Galvanized. Salt spray tests conducted with bare cut edges exposed, the corrosion resistance of Galvalume AZ50 is typically three to four times that of G90 HD Galvanized.

19. Galvalume vs. Galvanized Salt Spray test concerning the amount of hours to first significant rust Total # of Hours

20. Galvalume vs. Galvanized Corrosion Losses of Substrates H. D. Galvanized Galvanized 0.8 0 0.2 0.4 0.6 1 Corrosion Loss (Mils)

21. Dissimilar Metals Direct contact of steel to these metals will cause corrosion damage and deterioration of the steel. Even water run off from these metal will cause corrosion of the steel. Copper Iron Graphite Lead

23. Either:

24. From ingot.

25. From recycled scrap content.

26. Advantages:

27. Light in weight.

28. Highly resistant to corrosion.

29. Excellent reflector of light and heat.

31. Cast have low melting points and tensile strength. Wrought have high tensile strengths and are 85% of aluminum usage.

32. Standard Alloys for Roofing and Cladding;

33. 3003,3004 alloy corrosion resistance and formability are excellent.

34. 3105 alloy is an essentially 98% pure aluminum

36. 2000 series are alloyed with copper.

37. 3000 series are alloyed with manganese, and can be work-hardened.

38. 4000 series are alloyed with silicon.

39. 5000 series are alloyed with magnesium.

40. 6000 series are alloyed with magnesium and silicon.

41. 7000 series are alloyed with zinc, and can be precipitation hardened to the highest strengths of any aluminum alloy.

43. .032” , .040” , or .050”

44. Tempers;

45. H 14, H 24, or H 34 for roofing product.

46. H1 Strain hardened without thermal treatment.

47. H2 Strain hardened and partially annealed.

48. H3 Strain hardened by low temperature heating.

49. A second digit denotes the degree of hardness.

50. HX2 = 1/4 hard

51. HX4 = 1/2 hard

52. HX6 = 3/4 hard

53. HX8 = full hard

54. HX9 = extra hard