Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of Hot Dip Galvanized Steel Strip Supplier | GI Strip Coil Manufacturer China in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Hot Dip Galvanized Steel Strip | GI Strip Coil Supplier & Manufacturer
Hot Dip Galvanized Steel Strip (GI Strip Coil) is a corrosion-resistant steel material produced by immersing cold-rolled steel into molten zinc, forming a protective zinc coating layer. It is widely used in construction, automotive manufacturing, HVAC systems, electrical equipment, and home appliances due to its excellent anti-rust performance, long service life, and cost efficiency.
As a professional galvanized steel strip supplier and manufacturer in China, we provide customized thickness, width, zinc coating (Z30–Z275), and international standards (ASTM A653, EN 10346, JIS G3302) to meet global industrial and infrastructure project requirements.
Our galvanized strip is produced from high-quality cold rolled steel coil, ensuring excellent surface finish and mechanical properties.
Technical Specifications
| Parameter | Metric | Imperial |
|---|---|---|
| Thickness | 0.12 – 5.0 mm | 0.0047" – 0.197" |
| Width | 10 – 600 mm | 0.39" – 23.6" |
| Zinc Coating | Z30 – Z275 g/m² | 0.1 – 0.9 oz/ft² |
| Coil Weight | 3 – 10 tons | 3 – 10 tons |
| Surface | Regular Spangle / Zero Spangle | - |
| Grades | SGCC / DX51D / ASTM A653 | - |
| Thickness Tolerance | ±0.02 – 0.05 mm | - |
Core Performance Advantages
🔹 Superior Corrosion Resistance
The hot-dip galvanizing process forms a metallurgical bond between zinc and steel, providing long-term protection even in harsh outdoor environments.
🔹 Extended Service Life
Galvanized coating significantly extends the lifespan of steel products, reducing maintenance and replacement costs.
🔹 Excellent Formability & Processing
Suitable for bending, roll forming, stamping, and welding applications.
🔹 Cost-Effective Protection Solution
Lower lifecycle cost compared to painted or untreated steel materials.
Applications of Galvanized Steel Strip
Construction: roofing sheets, steel framing, wall panels
Automotive: structural parts, reinforcements, brackets
HVAC: air ducts, ventilation systems
Electrical: cable trays, conduits, enclosures
Home Appliances: washing machines, refrigerators
Galvanized Strip for Pipe Making
Galvanized strip for pipe making is widely used as the primary raw material in the production of welded steel pipes. By using hot dip galvanized steel strip, manufacturers can directly form and weld pipes with pre-coated zinc layers, ensuring basic corrosion resistance while maintaining high production efficiency and lower costs.
Compared with post-galvanizing processes, using GI strip for pipe production significantly improves manufacturing speed and reduces processing steps, making it an ideal solution for furniture pipes, structural tubes, fencing systems, and light industrial applications.
To ensure high-quality pipe production, galvanized steel strip should meet the following requirements:
Uniform zinc coating (Z60–Z180) for consistent protection
Stable mechanical properties for forming and welding
Precise thickness tolerance for accurate pipe dimensions
Good surface quality (no peeling or defects)
Excellent weldability for high-frequency tube mills
Comparison: Hot Dip vs Electro Galvanized Steel
| Feature | Hot Dip Galvanized | Electro Galvanized |
|---|---|---|
| Coating Thickness | Thick (Z30–Z275) | Thin |
| Corrosion Resistance | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Durability | Excellent | Moderate |
| Cost Efficiency | High (long-term) | Lower upfront |
| Application | Outdoor & industrial | Indoor |
Compared with electro galvanized steel, hot dip galvanized strip provides thicker coating and better corrosion resistance.
How to Choose the Right Galvanized Steel Strip?
1️⃣ Choose Thickness
Thin (0.12–0.5 mm): appliances, electronics
Medium (0.5–2.0 mm): construction, HVAC
Thick (>2.0 mm): structural applications
2️⃣ Select Zinc Coating
Z60–Z120 → indoor use
Z180–Z275 → outdoor / marine
3️⃣ Surface Type
Regular spangle → general use
Zero spangle → painting & precision
Inspection & Quality Assurance
We implement strict quality control systems:
Raw material chemical analysis
Zinc coating thickness testing
Surface inspection & defect control
Salt spray test (72–500 hours)
Mechanical property testing
Third-party inspection: SGS / BV / TÜV
Product Delivery Standards
Export standard seaworthy packaging
Waterproof + anti-rust protection
Steel strip binding reinforcement
Custom labeling & OEM marking available
Why Choose Us
✔ 10+ years galvanized steel manufacturing experience
✔ Full export experience (Middle East, Europe, South America)
✔ Stable supply & fast delivery
✔ Competitive factory price
✔ OEM & custom production supported
Contact Us
Phone / WeChat / WhatsApp: +8615769214734
Email: office@dongmjd.com
👉 Send your requirements now to get fast quotation within 12 hours
Learn more about Z275 galvanized steel strip specifications and coating performance.
FAQ
🔹 What is hot dip galvanized steel strip?
Hot dip galvanized steel strip is a steel strip coated with a layer of zinc by immersing it into molten zinc. This process creates a strong metallurgical bond that provides excellent corrosion resistance and long-term durability.
🔹 What is the difference between GI strip and galvanized steel strip?
There is no difference. GI (Galvanized Iron/Steel) strip is another common name for galvanized steel strip used in international trade and industry.
🔹 What zinc coating should I choose for my application?
The selection depends on the environment:
Z30–Z60 → Indoor applications
Z80–Z120 → Light industrial use
Z180–Z275 → Outdoor or high-corrosion environments
Higher coating weight provides better corrosion protection and longer service life.
🔹 What are the common sizes of galvanized steel strip?
Typical specifications include:
Thickness: 0.12 mm – 5.0 mm
Width: 10 mm – 600 mm
Coil weight: 3 – 10 tons
Custom slit width and thickness are available based on project requirements.
🔹 What standards do you follow?
We manufacture according to international standards:
ASTM A653
EN 10346
JIS G3302
Custom standards can also be supported.
🔹 What is the difference between hot dip and electro galvanized strip?
Hot dip galvanized → thicker coating, better corrosion resistance
Electro galvanized → thinner coating, smoother surface
Hot dip is more suitable for outdoor and industrial use.
🔹 Can galvanized steel strip be used outdoors?
Yes. With proper zinc coating (Z180–Z275), galvanized steel strip performs well in outdoor and even harsh environments such as coastal or industrial areas.
🔹 Is galvanized steel strip suitable for welding and forming?
Yes. It has good formability and can be used for bending, stamping, and roll forming. Welding is also possible with proper ventilation and surface preparation.
🔹 What is the lifespan of galvanized steel strip?
Depending on coating thickness and environment, the service life can range from 10 to 50 years or more.
🔹 Do you provide customized galvanized steel strip?
Yes, we support:
Custom thickness & width
Slitting service
Surface type (spangle / zero spangle)
OEM marking & packaging
🔹 What is your minimum order quantity (MOQ)?
MOQ usually starts from 5 tons, but flexible solutions are available for trial orders.
🔹 How do you ensure product quality?
We follow strict inspection procedures:
Zinc coating thickness testing
Mechanical property testing
Surface inspection
Salt spray testing
Third-party inspection (SGS / BV)
🔹 What is your delivery time?
Standard delivery time is 7–15 days, depending on order quantity and specifications.
🔹 How is the galvanized steel strip packaged for export?
Waterproof + anti-rust packaging
Steel strip binding
Wooden pallet (optional)
Custom labeling available
Hot Tags: Hot Dip Galvanized Steel Strip Supplier | GI Strip Coil Manufacturer China, China Hot Dip Galvanized Steel Strip Supplier | GI Strip Coil Manufacturer China manufacturers, suppliers, factory
