Galvanized Steel Sheet: The Ultimate Fire-Resistant Material

Specification: Galvanized Steel Sheet: The Ultimate Fire-Resistant Material

Galvanized steel sheet is a type of steel sheet that has been coated with a layer of zinc through a process called galvanization. This coating provides excellent durability and corrosion resistance to the steel sheet, making it an ideal material for various applications, including fire-resistant structures.

Mechanical Composition:

1. Tensile Strength:
– Minimum yield strength: 240 MPa
– Minimum tensile strength: 370 MPa

2. Elongation:
– Minimum elongation: 20%

3. Hardness:
– Rockwell hardness: HRB 60-75

Chemical Composition:

1. Carbon (C): 0.12% (maximum)
2. Manganese (Mn): 0.50% (maximum)
3. Phosphorus (P): 0.040% (maximum)
4. Sulfur (S): 0.050% (maximum)
5. Zinc (Zn): minimum 99.995%
– The zinc coating provides excellent fire resistance by forming a protective barrier, preventing oxygen from reaching the steel sheet.

Additional Specifications:

1. Coating Thickness:
– Minimum average coating weight: 90 g/m2 on both sides of the steel sheet

2. Surface Finish:
– Regular spangle or zero spangle
– Uniform, smooth, and free from defects

3. Width and Length:
– Width: 600 mm to 1500 mm
– Length: up to 6000 mm

Advantages of Galvanized Steel Sheet as a Fire-Resistant Material:

1. Excellent Fire Resistance:
– The zinc coating provides a barrier that prevents the spread of fire by cutting off the oxygen supply to the steel sheet.

2. Corrosion Resistance:
– The galvanized coating protects the steel sheet from corrosion, extending its lifespan in high-temperature environments.

3. Durability:
– Galvanized steel sheets are highly durable and can withstand extreme temperatures, making them suitable for fire-resistant applications.

4. Easy Installation and Maintenance:
– Galvanized steel sheets are easy to install and require minimal maintenance, reducing overall costs.

5. Versatility:
– Galvanized steel sheets can be used in various fire-resistant applications, including walls, ceilings, roofs, and fire-rated doors.

Overall, galvanized steel sheet is a preferred material for fire-resistant structures due to its high fire resistance, corrosion resistance, and durability. Its mechanical and chemical composition ensures optimum performance and functionality in fire-prone environments.