Hot-dip galvanized steel strip is manufactured from cold or hot rolled steel substrates through pickling, hot galvanization, and precision slitting. It offers excellent corrosion resistance, formability, and durability, and is widely used in construction, electronics, home appliances, and automotive industry. Wanzhi Group operates continuous hot-dip galvanizing lines with advanced slitting units, supplying galvanized steel strips ranging from Z30 to Z275g/m² in various specifications.
Width: 50mm-600mm
Thickness: 0.12mm-2mm
Zinc Coating Thickness: Z30 g/m2 – Z275 g/m2
Specification
| Product Name | Hot-dip Galvanized Steel Strip |
|---|---|
| Width | 20mm - 1250mm, can be customized |
| Thickness | 0.12mm - 6mm |
| Material | DC51D, DC52D, DC53D, DC54D, SGCC, SGCD, Q195, Q235, Q345, etc. |
| Length | According to your requirements |
| Spangle | Zero spangles, Small spangles, Regular spangles, Big spangles |
| Zinc Coating Thickness | Z30 g/m2 - Z275 g/m2 |
| Coil Inner Diameter | 508mm / 610mm |
| Coil Weight | 3-8 ton per coil |
| Surface Treatment | Passivated, oiled, anti-fingerprint available |
| Processing Service | Bending, Welding, Cutting, Punching, etc. |
| MOQ | 10 tons |
| Standard | GB, EN, ASTM, JIS |
| Package | Standard export packaging or as per your requirements |
Mechanical Properties of HDG Steel Strip
| Item | Details |
| Tensile Strength | 315 – 600 MPa |
| Yield Strength | 205 – 450 MPa (varies by substrate grade) |
| Elongation (A80) | ≥ 10% |
| Surface Flatness | Flat and smooth, free from scratches, pits or zinc buildup |
| Thickness Tolerance | ± 0.02 mm (tolerance adjusted for thickness over 2mm) |
| Width Tolerance | ± 0.5 mm |
| Oil Film Uniformity | Evenly distributed, no dripping or pooling |
Classification of Hot-dip Galvanized Steel Strip
Strip steel denotes coiled long flat steel with versatile sizes and great machinability. Hot-dip galvanized steel strip is produced via hot-dip galvanizing treatment, widely adopted in construction, home appliances, automotive, power communication, agriculture and new energy sectors.
Width
- Narrow Galvanized Steel Strip: Width less than 600 mm, the standard specification range of finished steel strip. It includes ultra-narrow strips and slit strips of 100–600 mm, which can be directly processed into profiles, light steel keels and metal hardware.
- Medium-wide Galvanized Steel Coil: Width 600 mm to 1000 mm. This size requires secondary slitting before component processing.
- Wide Galvanized Steel Coil: Width over 1000 mm, also referred to as mother coil. It serves as raw material for further slitting into various sizes of narrow galvanized steel strip.
Spangle Types
- Big Spangle: Featured with large, distinct zinc crystal grains, presenting a traditional and classic galvanized surface texture.
- Regular Spangle: Equipped with medium and uniform zinc crystals, it is the most widely used standard surface finish for general purposes.
- Small Spangle: Adopts fine and dense zinc crystal patterns, achieving a smoother and neater surface appearance.
- Zero Spangle: Boasts a crystal-free ultra-smooth surface with high flatness, perfect for products requiring high surface quality and aesthetics.
Surface Treatment
Multiple standard surface treatments are provided to strengthen anti-corrosion property and meet different post-processing and appearance needs. Wanzhi Group offers customized surface treatments tailored to your specific requirements.
- Chromate Passivation: Forms chromate conversion film on zinc layer, improves corrosion resistance and surface stability.
- Oiling: Applies thin anti-rust oil film to avoid white rust during transit and storage.
- Phosphating: Boosts coating adhesion for subsequent painting or finishing processes.
- Anti-fingerprint Treatment: Creates smooth stain-resistant surface for products with high aesthetic requirements.
Hot-dip Galvanized Steel Strip Production Process
- Uncoiling: Steel coils are uncoiled and sorted for subsequent processing.
- Surface Pretreatment: Remove grease, scale and rust from steel substrates via degreasing and acid pickling.
- High-temperature Annealing: Heat the strip in a nitrogen protective atmosphere to eliminate internal stress and improve toughness.
- Hot-Dip Galvanizing: Steel strip is immersed in molten zinc to form a dense, protective zinc coating.
- Precise Coating Control: Accurately adjust the zinc layer thickness via an air knife system to meet customized coating requirements.
- Cooling & Surface Treatment: Cool the strip steadily, followed by passivation, light oiling or anti-fingerprint treatment to enhance anti-corrosion performance.
- Precision Slitting & Packaging: Slit coils into customized widths, complete full quality inspection, and adopt standard export packaging.
Hot-dip Galvanized Steel Strip Prices
The price of galvanized steel strip mainly depends on raw material costs, zinc coating weight, substrate thickness and grade, surface treatment, and order quantity. Zero spangle galvanized steel strip requires stricter production processes, advanced surface treatment, and precise temperature control, resulting in higher manufacturing costs than regular spangle galvanized steel strip. The price of standard specification galvanized steel supplied by Wanzhi Group ranges from USD 600 to USD 800 per ton. Sufficient stock is available, with delivery within 5-45 days depending on order quantity. Please leave a message with your required specifications and quantity, and we will offer a free quotation.
Advantages of Hot-dip Galvanized Steel Strip
- Excellent Corrosion Resistance: The zinc coating provides strong protection against rust and corrosion, extending service life.
- Full coverage protection: Coating covers every edge and crevice of the strip, providing all-round barrier protection without blind spots.
- Strong Coating Adhesion: The metallurgical bond between steel and zinc ensures a durable and reliable coating.
- Superior Formability: Suitable for hot and cold forming processes, including bending, stamping, and fabrication.
- Long Service Life: The zinc layer offers long-term protection with low maintenance requirements.
- Uniform Coating Quality: Continuous hot-dip galvanizing ensures consistent coating thickness and surface performance.
Applications
- Construction Industry: Light steel keels, roofing systems, wall panels, structural components, and building materials.
- Steel Pipe Manufacturing: Welded pipes, galvanized pipes, and tubular products.
- Automotive Industry: Vehicle body parts, chassis components, and structural parts.
- Home Appliances: Appliance housings, panels, and internal components.
- Metal Fabrication: Profiles, fences, rolling doors, bridge structures, and fabricated metal products.
- Electrical & Industrial Equipment: Cable trays, equipment enclosures, and industrial components.
Hot-dip Galvanized Steel Strip Manufacturer & Supplier – Wanzhi Group
Wanzhi Group is an ISO-certified steel manufacturer and supplier, with its factory located in Boxing County, Binzhou City, Shandong Province, China. We operate 2 galvanizing production lines, 3 color coating production lines, and are equipped with laser cutting machines, slitting units, and other advanced equipment. Each production line has a monthly capacity of 10,000 tons. We supply both raw materials, including hot-rolled and cold-rolled steel, and various steel strip products such as galvanized steel strip, aluminum-zinc coated steel strip, pre-painted galvanized steel strip, and stainless steel strip in different specifications. Our products are exported to more than 120 countries and regions worldwide, meeting diverse project requirements.
Quality Control System
Wanzhi Factory has obtained ISO9001, ISO14001, and ISO45001 management system certifications. The factory is equipped with multiple production lines, as well as sample rooms and quality inspection laboratories. From raw material procurement and production processing to quality inspection and finished product packaging, the factory has established a strict full-process management system. With an annual production capacity of 600,000 tons, our steel products strictly comply with international standards such as ASTM, GB, JIS, and EN. We provide original Mill Test Certificates (MTC) and support third-party inspections by SGS and BV.
One-stop Services
- Supply Capacity & Export Support: Wanzhi Group supplies various metal raw materials and finished products worldwide, with business coverage across South America, Africa, the Middle East, Southeast Asia, Europe, and other regions. Located near Qingdao Port and Tianjin Port, our factory supports multiple trade terms, including FOB, CIF, and EXW. We also handle customs clearance, commodity inspection, and vessel booking to ensure timely delivery of goods.
- Customization Services: We offer full-process support including material selection, technical consulting, production and supply, as well as flexible OEM & ODM customization. 24/7 online service is available.
- Deep Processing Services: In addition to supplying raw materials, we provide deep processing services including cut-to-length, punching, stamping, bending, forming, welding, laminating, coating, and customized profile processing.
Packaging & Delivery
Our galvanized steel strips are packed with standard international export packaging, including plastic film, anti-rust film, kraft paper, galvanized iron sheets, steel straps, corner protectors, moisture-proof paper, and other materials. The packaging effectively prevents moisture, rust, and damage during sea transportation. The outer packaging is marked with product name, specifications, model, production date, and manufacturer information for easy traceability and management.
Customer Visits
Wanzhi Factory has welcomed customers from more than 40 countries and regions, including Turkmenistan, Kazakhstan, Peru, Indonesia, Turkey, Georgia, Libya, the UAE, and Saudi Arabia, for factory visits and inspections. Customers can visit our production lines, steel processing equipment, quality inspection processes, and product displays on-site to gain a deeper understanding of Wanzhi Group’s production capabilities and quality management system. These visits strengthen communication and cooperation between both parties. For factory visit appointments, sample requests, or project consultations, please leave a message, and our customer managers will contact you.
Client Feedback
So far, our galvanized steel, galvalume steel, prepainted steel, ZAM, stainless steel, and other products have been exported to more than 120 countries and regions worldwide. They are widely used in construction, industrial, infrastructure, home appliance, agriculture, and other fields. Customers highly appreciate and recognize our strict dimensional tolerances, reliable product quality, and on-time delivery.
Wanzhi Steel Group provides various steel strip products, including galvanized steel strip, pre-painted steel strip, stainless steel strip, and customized solutions to meet the application needs of different industries. We are committed to providing high-quality products and comprehensive services. Contact us for more information.