G90 galvanized steel coil features a 0.90 oz/ft² zinc coating according to ASTM standards (ASTM A653 / A653M), offering excellent corrosion resistance, durability, and formability. It is widely used in construction, automotive, and industrial applications. Wanzhi Group operates multiple galvanizing lines and supplies G90 galvanized coils, sheets, strips, and tubes in various specifications. Custom sizes, widths, and zinc coating weights are available.
Thickness: 0.12 mm – 4.0 mm
Width: 600 mm – 1500 mm, can be customized
Material: DX51D+Z, DX52D+Z, DX53D+Z, CS Type B, SS Grade 33/40/50, Q235, Q345, SPCC, SGCC, etc.
G90 vs. Z275 Galvanized Steel Coil
G90 and Z275 galvanized steel coils have nearly equivalent zinc coating levels (G90 ≈ Z275), but they follow different standards: G90 is based on ASTM standards, while Z275 follows EN standards. Both provide reliable corrosion resistance for various applications.
- G90 galvanized steel coil follows ASTM standards (ASTM A653/A653M). The letter “G” indicates a galvanized zinc coating, while the number represents the zinc coating weight. G90 means a zinc coating weight of 0.90 oz/ft² (approximately 275 g/m²) on both sides of the steel surface. Higher G values indicate thicker zinc coatings.
- Z275 galvanized steel coil follows EN standards (EN 10346). The letter “Z” represents zinc coating, and the number indicates the coating weight in g/m². Z275 means a zinc coating weight of 275 g/m² on both sides. Common designations include DX51D+Z275, where the zinc coating grade is specified according to EN standards.
G90 Galvanized Steel Coil Price
The price of G90 galvanized steel coil depends on various factors, including substrate grade, zinc coating weight, surface treatment, spangle type, and product specifications. The price range is USD 650–850 per ton. Wanzhi Group has its own manufacturing facilities, ensuring stable quality and reliable supply. We offer competitive wholesale prices for bulk orders. Send your required specifications and quantity to receive an accurate quotation and customized solution.
Specification
| Product Name | G90 Galvanized Steel Coil |
|---|---|
| Zinc Coating Weight | 0.90 oz/ft² (≈275 g/m²) both sides |
| Substrate | Cold-rolled steel coil |
| Material | DX51D+Z, DX52D+Z, DX53D+Z, CS Type B, SS Grade 33/40/50, Q235, Q345, SPCC, SGCC |
| Spangle Type | Zero spangle, small spangle, regular spangle, big spangle |
| Thickness(mm) | 0.12 mm - 4.0 mm |
| Width(mm) | 600 mm - 1500 mm |
| Length(mm) | According to your requirements |
| Coil Weight | 3 - 8 metric tons, customizable |
| Surface Treatment | Chromated, oiled, anti-fingerprint treatment, phosphating, etc. |
| MOQ | 10 tons |
| Delivery Time | 5 - 45 days |
| Package | Standard export package or customized packaging |
Zinc Coating Grades of Galvanized Steel Coil
The zinc coating weight affects the corrosion resistance, durability, and cost of galvanized steel coil. According to ASTM A653/A653M, galvanized coatings use the G+number designation, while EN 10346 uses the Z+number designation. Higher coating grades provide stronger corrosion protection and longer service life. The micron value below indicates the approximate zinc layer thickness on one side.
| ASTM Grade | Approx. EN Equivalent | Zinc Coating Weight | Approx. Zinc Thickness (One Side) |
| G30 | Z90 | 0.30 oz/ft² (≈90 g/m²) | ≈6 μm |
| G40 | Z120 | 0.40 oz/ft² (≈120 g/m²) | ≈8 μm |
| G60 | Z180 | 0.60 oz/ft² (≈180 g/m²) | ≈13 μm |
| G90 | Z275 | 0.90 oz/ft² (≈275 g/m²) | ≈19 μm |
| G115 | Z350 | 1.15 oz/ft² (≈350 g/m²) | ≈25 μm |
| G140 | Z450 | 1.40 oz/ft² (≈450 g/m²) | ≈32 μm |
Zinc Coating Grades Available from Wanzhi Group
Wanzhi Group supplies galvanized steel coils with zinc coating weights ranging from Z30 to Z275. According to ASTM A653/A653M standards, we supply common coating grades including G30, G60 and G90. Among them, G30, G60, and G90 galvanized steel coils are widely exported for various construction and industrial applications.
- G30: Suitable for indoor applications and environments with low corrosion requirements.
- G60: Commonly used in general outdoor applications, construction materials, and building components.
- G90: Provides higher corrosion resistance for roofing, structural components, automotive parts, and outdoor environments with greater protection requirements.
Advantages of G90 Galvanized Steel Coil
- Excellent Corrosion Resistance: The G90 zinc coating provides strong protection against rust and corrosion, extending the service life of steel products in various environments.
- High Durability: The hot-dip galvanized coating offers excellent wear resistance and weather protection, making G90 galvanized steel suitable for long-term outdoor applications.
- Cost-Effective Performance: G90 galvanized steel provides a balance of corrosion protection, durability, and price, reducing maintenance costs compared with uncoated steel.
- Good Formability and Weldability: The cold-rolled steel substrate offers good processing performance, allowing cutting, bending, welding, stamping, painting, and fabrication.
- Consistent Zinc Coating Quality: The continuous hot-dip galvanizing process ensures uniform zinc coating weight and stable surface quality.
G90 Galvanized Steel Coil Applications
- Construction & Roofing: Roof panels, wall cladding, beams, columns, purlins, and other structural components.
- Storage & Industrial Facilities: Storage tanks, silos, warehouses, sheds, and industrial equipment.
- Agriculture: Farm buildings, barns, poultry houses, feed bins, and agricultural equipment.
- Automotive & Transportation: Vehicle body parts, chassis components, trailers, and transportation accessories.
- General Fabrication & Infrastructure: Electrical cabinets, fencing, guardrails, pipelines, and other metal structures.
G90 GI Steel Supplier – Wanzhi Group
Wanzhi Group is an ISO-certified galvanized steel manufacturer and supplier. We operate hot-dip galvanizing and electro-galvanizing production lines, supplying galvanized steel coils, sheets, strips, corrugated sheets, and tubes. Our factory is located in Shandong, China, equipped with multiple professional production lines, sample rooms, and quality inspection facilities. We implement strict quality management throughout raw material sourcing, production, inspection, and packaging. Our high-quality galvanized steel products are exported to over 120 countries and regions, providing reliable steel solutions for customers in construction, industrial, and manufacturing sectors.
Manufacturing Process of G90 GI Steel Coil – Wanzhi Factory
Want to learn more about the production process of G90 galvanized steel coil? Wanzhi Group welcomes customers to visit our factory and inspect our manufacturing process. Our factory has hosted customers from over 40 countries and regions. The hot-dip galvanizing process includes several key steps to ensure uniform zinc coating, stable performance, and reliable quality.
- Surface Cleaning: Steel coils undergo cleaning to remove oil, grease, and surface impurities before galvanizing.
- Annealing: The steel strip passes through an annealing furnace to improve mechanical properties and formability.
- Hot-Dip Galvanizing: The cleaned steel strip enters a molten zinc bath and forms a uniform zinc coating.
- Cooling & Surface Treatment: The galvanized steel cools down and receives surface treatment to improve corrosion resistance and surface quality.
- Finishing & Coiling: The finished galvanized steel coil undergoes leveling, inspection, and recoiling before storage or shipment.
Production Capacity & Delivery
Wanzhi Group operates galvanizing, galvalume, color coated steel, and aluminum-magnesium alloy production lines. Our annual production capacity reaches 600,000 tons. In addition to galvanized steel, we supply galvalume steel coils, sheets and strips, color coated steel coils and sheets, prepainted aluminum coils, ZAM steel, metal corrugated sheets, and stainless steel products. Standard products are available from stock for quick delivery. customized products are delivered within 5–45 days depending on specifications and requirements.
Certifications
Our factory has obtained ISO9001, ISO14001, and ISO45001 certifications. We manufacture galvanized steel products in compliance with international standards, including ASTM A653. Each shipment comes with an official Mill Test Certificate (MTC) for quality verification. We also support third-party inspections from recognized organizations such as SGS and BV. Free samples are also available for customer evaluation and testing.
Services
- Processing Services: Wanzhi Group provides various processing services with advanced equipment, including slitting, cutting, profiling, punching, perforation, and coating. We support customized processing to meet different application requirements.
- Technical Services: Our professional team provides product selection guidance, technical support, and installation assistance. We offer timely after-sales service to help customers solve application issues.
- Customization Services: We provide customized solutions covering coating grade, thickness, width, substrate, surface treatment, and other product specifications according to customer requirements.
Quality Inspection
Wanzhi Group conducts strict quality inspections throughout galvanized steel production. We test zinc coating weight, coating thickness, surface quality, dimensions, mechanical properties, and corrosion resistance to ensure stable product performance.
Packaging
Wanzhi Steel applies standard export packaging, consisting of anti-rust film, moisture-proof paper, kraft paper, galvanized iron sheet, edge protectors and wooden pallets. We also provide custom packaging solutions according to customers’ specific requirements.
Global Cases
Wanzhi Group supplies steel products and solutions to customers in over 120 countries and regions. With extensive export experience, we serve factory customers, wholesalers, and distributors worldwide.
Wanzhi Steel – Agricultural Greenhouse Project in Turkmenistan
550 tons PPGI Steel Coil to Azerbaijan
100 tons of Galvanized Coils to Saudi Arabia
144 ton Steel Wire to Spanish
Project of PPGI Roofing en Libya
100 tons of GL and PPGL in Solomon Islands
Customer Feedback
Customers from construction, steel trading, manufacturing, and other industries share positive feedback on Wanzhi Group’s products. They recognize the quality of our GI, GL, PPGI, PPGL, and corrugated metal sheets, etc. Their feedback also highlights our reliable delivery, professional communication, and service support.
