The Benchmark for High-Performance Zinc ProtectionOur ASTM A653 Hot-Dip Galvanized Steel Coils are manufactured to provide superior atmospheric corrosion resistance and structural reliability. As a versatile material compliant with strict ASTM international standards, these coils are the foundation for critical infrastructure, HVAC systems, and heavy-duty industrial components.
By utilizing a precision continuous galvanizing process, Bomis Steel ensures a metallurgically bonded zinc coating that remains intact even under severe mechanical stress.
Zinc Coating Designations: From G30 to G90
We offer a comprehensive range of zinc coating weights tailored to your project’s specific lifespan requirements. The ASTM A653 standard defines these designations based on the total weight of zinc on both surfaces:G30 ($90g/m^2$): Ideal for indoor applications or light-duty components where cost-efficiency is a priority.G60 ($180g/m^2$): The industry standard for standard outdoor exposure, providing a robust balance of protection and formability.G90 ($275g/m^2$): Engineered for high-corrosive environments. The thicker zinc layer provides maximum sacrificial protection, significantly extending the service life of steel in coastal or industrial zones.

Zinc Coating Designations: From G30 to G90

We offer a comprehensive range of zinc coating weights tailored to your project’s specific lifespan requirements. The ASTM A653 standard defines these designations based on the total weight of zinc on both surfaces:

• G30 ($90g/m^2$): Ideal for indoor applications or light-duty components where cost-efficiency is a priority.

• G60 ($180g/m^2$): The industry standard for standard outdoor exposure, providing a robust balance of protection and formability.

• G90 ($275g/m^2$): Engineered for high-corrosive environments. The thicker zinc layer provides maximum sacrificial protection, significantly extending the service life of steel in coastal or industrial zones.

Technical Specifications (ASTM A653 Compliance)

Feature	ASTM A653 / A653M Requirement	Bomis Steel Performance
Substrate Grade	CS, FS, SS, DDS, EDDS	Full range available
Zinc Coating Mass	G30, G40, G60, G90 (up to G235)	High precision coating control
Surface Finish	Regular, Minimized, or Extra-smooth	Optimized for end-use
Chemical Treatment	Passivated (C), Oiled (O), Dry (D)	Anti-rust protection guaranteed
Flatness	Standard or Tension Leveled	Superior surface flatness