GI Hot dip Galvanised zinc-coated steel coils sheet 1.5mm G60/G90 for Floor Deck Sheets
What is hot-dip galvanised steel?
Hot-dip galvanising is a process that involves coating steel with a thin layer of zinc to prevent rust from forming. The surface treatment is achieved by passing the steel through molten zinc at high temperature, providing long-term protection for steel products.
The zinc coating has a corrosion resistance and sacrificial corrosion function that delays the production of red rust. The zinc layer of hot-dip galvanised steel is higher than that of electro-galvanised sheet steel, giving it better corrosion resistance.
Steel deck overview
Floor decking sheets is also known as profiled steel deck,metal deck,roof decking, etc.The earliest name of bondek is called corrugated steel deck,and all steel floor decking sheets that are pressed and formed by a platen press and are collectively referred to.The floor slab is made from galvanized steel sheet by cold roll forming,and its cross section is V-shaped, U-shaped, trapezoidal or the like. It is mainly used as a permanent template and can also be selected for other purposes.The earliest compacted steel decking sheets were mainly used as roof panels of factory roof,followed by profiled steel plates used for the floors and gradually classified as floor decking sheets.
- All steel shall be coated to conform to ASTM A924 G-60 or G-90 or to Federal Specification QQ-S-775.
- Galvanized finish in G-90 coating is desirable in high moisture atmospheric conditions.
Steel standards | Yield Strength(MPa) | Tensile strength (N/mm²) |
Q235 | ≥235 | 215 |
Q345 | ≥345 | 300 |
G500 | ≥500 | 520 |
G550 | ≥550 | 550 |
Applications for hot-dip galvanised steel sheet and coil
- Automotive
- Pipes and tubes
- Exterior cladding
- Agriculture
- Construction


