Contents
G60 vs G90 Galvanizing: Differences Explained
- John
G60 and G90 refer to different levels of zinc coating thickness on galvanized steel. G90 has a thicker coating, making it more resistant to corrosion. G60 is the most commonly used zinc coating thickness for its good balance between cost and corrosion protection.
Different Zinc Coating Weights of G60 and G90 Galvanizing
G60 and G90 indicate the amount of zinc coating applied to the steel surface to enhance corrosion resistance. The number represents the weight of zinc coating in ounces per square foot of steel.
- G60: 0.60 ounces of zinc per square foot of steel
- G90: 0.90 ounces of zinc per square foot of steel
The zinc coating serves as a protective layer on galvanized steel. Its main purpose is to create a barrier on the steel surface. The difference in coating weight means different performance between G60 and G90.
What is the Difference between G60 and G90 Galvanized Steel
This table highlights the main differences between G60 and G90 galvanized steel including zinc coating weight, corrosion resistance, cost, and lifespan.
| Aspect | G60 | G90 |
| Zinc Coating Weight | 0.60 oz per sq ft | 0.90 oz per sq ft |
| Corrosion Resistance | Moderate | High |
| Cost | Lower | Higher |
| Lifespan | Moderate | Longer |
Corrosion Resistance
G90 offers higher corrosion resistance. This makes it well-suited for outdoor environments or areas with high moisture, like coastal regions or industrial sites.
G60 provides moderate corrosion resistance. It works best in indoor settings or environments with limited exposure to moisture.
Cost
G90 galvanized steel generally costs more than G60. The extra zinc and additional processing steps lead to a higher production cost. G90 is usually chosen for projects where long-term durability justifies the investment. G60, with its lighter zinc layer, provides cost savings for controlled environments.
Maintenance
G90 galvanized steel generally requires less maintenance than G60. In mild indoor settings, both G60 and G90 require minimal maintenance, as corrosion risks are low. But for long-term exposure to moisture or corrosive elements, G90’s added thickness gives it an advantage, needing less upkeep over time.2
Different Applications of G60 and G90 Galvanizing
G60 galvanized steel is widely used for indoor projects or settings with controlled environments. It’s commonly applied in HVAC systems, interior wall panels, and ductwork, where exposure to moisture is limited. G60’s cost-effectiveness makes it ideal for these moderate-protection scenarios.
G90 galvanized steel is suited for outdoor and high-exposure applications. This coating is ideal for structural components like roofing, siding, and outdoor metal decks, especially in coastal or industrial areas. G90’s enhanced durability makes it a preferred choice for projects requiring a longer lifespan and less maintenance.
Quality Galvanized Steel Products
For high-quality galvanized steel products, Steel Pro Group has everything you need. We offer galvanized steel decking, galvanized steel sheets, and coils. Please check out our quote request here for competitive pricing and expert support tailored to your requirements.
