Galvanized Steel G60 and G90
Popular specifications are in short supply!
click to get the specification sheet!
What Is G60 Galvanized Steel?
G60 galvanized steel has a total zinc coating weight of 0.60 oz/ft², split across both sides of the sheet. That equals about 0.30 oz/ft² per side.
Typical thickness of zinc layer: roughly 0.3 mils per side
Corrosion resistance: adequate for indoor environments and many controlled outdoor conditions
Common applications: HVAC ductwork, interior building products, office furniture, and general manufacturing where exposure to moisture and weather is limited
G60 strikes a balance between protection and cost, making it a practical choice for buyers who don't require the maximum lifespan of a heavier coating.
What Is G90 Galvanized Steel?
G90 galvanized steel carries a total zinc coating weight of 0.90 oz/ft², or about 0.45 oz/ft² per side.
Typical thickness of zinc layer: about 0.6 mils per side
Corrosion resistance: stronger than G60, especially in environments with higher humidity, outdoor exposure, or frequent condensation
Common applications: roofing, siding, outdoor panels, structural components, agricultural equipment, and other uses where long-term durability is critical
The heavier zinc coating provides added insurance against rust, which is why G90 is often specified in construction and outdoor applications.
Comparing G60 and G90: Key Considerations
When deciding between G60 galvanized steel and G90 galvanized steel, think in terms of exposure, cost, and service life.
1. Exposure Conditions
G60 works well indoors or in controlled environments
G90 is better suited for exterior or semi-exposed settings where moisture and weather accelerate corrosion
2. Service Life Expectation
G90 lasts longer due to its thicker zinc layer
If your customer requires extended warranties, G90 is often the safer choice
3. Cost Balance
G60 typically costs less, since it uses less zinc
G90, while more expensive, may save on long-term replacement or maintenance costs
4. Industry Standards and Codes
Certain building codes and OEM specifications mandate G90
Other sectors may allow or prefer G60 for cost efficiency
Industries and Applications
|
Industry / Sector |
G60 Applications |
G90 Applications |
|
Automotive and Transportation |
Interior panels, non-exposed components |
Exterior parts requiring enhanced corrosion resistance |
|
Construction and Building Products |
Interior framing, studs, ceiling grids |
Roofing panels, siding, flashing, gutters |
|
HVAC and Ductwork |
Standard ducts, indoor systems |
Rooftop units, ductwork exposed to outdoor air |
|
Appliances and Furniture |
Washers, dryers, shelving, office furniture |
Outdoor enclosures, toolboxes, storage products |
|
Agriculture and Industrial Equipment |
Indoor machinery housings |
Fencing, silos, irrigation systems, exposed equipment |
