Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of galvanized steel plate gi roll coil strip g90 in China. Welcome to wholesale customized galvanized steel plate gi roll coil strip g90 at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
G90 refers to a specific coating weight designation for hot-dip galvanized steel under the ASTM A653 standard. It is one of the most common specifications used in North America for projects requiring enhanced corrosion resistance.
Key Features of G90 Galvanized
- Coating Weight: The "G90" label means there is a total of 0.90 ounces of zinc per square foot applied to both sides of the steel sheet .
- Corrosion Protection: Because it has a thicker zinc layer than standard grades like G40 or G60, G90 provides superior protection against rust and environmental decay, especially in moist or outdoor conditions.
- While more expensive than lower coating weights (like G60), G90 is preferred when longevity is a priority. The thicker zinc coating acts as a sacrificial anode, protecting the underlying steel even if the surface is scratched or cut.
Specification Sheet
|
Product Name |
Galvanized Steel Sheet /Plate |
|||
|
Wall thickness |
0.12MM~10MM |
|||
|
Length |
600MM~1500MM |
|||
|
Standard |
BS4449-2005,GB1449.2-2007,JIS G3112-2004, ASTM A615-A615M-04a, |
|||
|
Grade |
||||
|
Zinc coating |
40g/m2 to 275g/m2 |
|||
|
Packing |
Bundle, or with all kinds of colors PVC or as your requirements |
|||
|
Surface Treatment |
1. Galvanized |
|||
|
Origin |
Shanghai OF China |
|||
|
Certificates |
API ISO9001-2008,SGS.BV |
|||
|
Delivery Time |
Usually within 10-15days after receipt of advance payment |
|||
Application Scenarios
1,Galvanized sheet metal is widely used in the construction, manufacturing, and agricultural fields.
2,In the construction industry, galvanized sheet metal is used to manufacture building materials such as roofs, walls, screens, and doors and windows. 3,In the manufacturing industry, it can be used to manufacture automotive components, electrical enclosures, pipelines, and other industrial equipment.
4,In the agricultural field, galvanized sheets can be used for manufacturing livestock houses, agricultural tools, and agricultural machinery.
FAQ
1. How long will G90 galvanized steel last outdoors?
The lifespan of G90 steel depends on the environment. In rural areas with low pollution, it can last 25 to 50 years. In coastal or industrial areas with high salt or chemical exposure, the lifespan may be shorter, typically 10 to 20 years. Its thicker zinc coating ($275 \text{ g/m}^2$) provides significantly better longevity than standard G40 or G60 grades.
2. Can G90 galvanized steel be painted?
Yes, it can. However, because of the smooth zinc surface and factory oils, it requires proper preparation. For best results, use a "Bonderized" (phosphatized) surface or a specialized primer designed for galvanized metal. Skin Passed (SP) G90 is highly recommended for painting applications to ensure a smooth, mirror-like finish.
3. Is G90 steel weldable?
Yes, G90 can be welded using standard methods like MIG, TIG, or spot welding. However, because the zinc coating is thick, it can produce zinc oxide fumes, which are hazardous. Proper ventilation and specialized welding settings (higher current or slower speeds) are necessary to ensure a strong joint and worker safety.
4. How does G90 compare to Galvalume (AZ50/AZ55)?
While both are protective coatings:
G90 (Galvanized): 100% Zinc. Better for alkaline environments (like animal confinement) and offers superior "sacrificial protection" for cut edges.
AZ55 (Galvalume): Aluminum-Zinc alloy. Generally offers better long-term atmospheric corrosion resistance but is more susceptible to "edge creep" and is not recommended for use in highly alkaline environments.
5. Does G90 come in different surface finishes?
Yes. You can order G90 in three primary finishes:
Regular Spangle: Traditional "snowflake" pattern.
Minimized/Zero Spangle: A smooth, uniform matte appearance.
Chemically Passivated (Chromo): A thin chemical film applied to prevent "white rust" (storage stain) during transit and storage.
Hot Tags: galvanized steel plate gi roll coil strip g90, China galvanized steel plate gi roll coil strip g90 manufacturers, suppliers, factory, rolled steel, Cold Rolled Mild Steel Sheet, steel sheet cold roll, cold rolled stainless steel sheet, cold rolled low carbon steel, Cold Rolled Galvanized Steel Sheet
