Coated Steel Coils: Coated products use cold-rolled or hot-rolled coils as substrates, and are coated with an anti-corrosion coating through a hot-dip galvanizing process, significantly improving corrosion resistance.
- Hot-Dip Galvanized (GI) Coils: Standards: ASTM A653M, JIS G3302, DIN 17162
Coating Type: Pure Zinc Coating
Coating Weight: 120/180/200/220/275 g/m² (double-sided)
Material Series: SGCC, SGCD-1 (JIS); Commercial Grade, Stamping Grade, Deep Drawing Grade
- Galvalume (GL) Aluminized Zinc Coils: Coating Composition: 55% Aluminum, 43.5% Zinc, 1.5% Silicon
Performance Advantages: Corrosion resistance is 2-4 times that of pure zinc coatings
Applications: Building roofs, walls, appliance back panels
- Zinc-Aluminum-Magnesium Coils (ZAM) Coating Composition: Zinc + Aluminum + Magnesium Alloy
Performance Advantages: Self-healing cuts, excellent corrosion resistance
Specification Capabilities: Tangsteel has achieved the first nationwide production of ultra-thin and ultra-thick coated zinc-aluminum-magnesium products.
Aluminized Coil / Aluminized Market Position: Tangsteel holds the number one market share in aluminized sheets nationwide and is the only domestic enterprise capable of stable mass production of aluminized sheets in thicknesses ranging from 0.4mm to 3.0mm.
Application Areas: Automotive exhaust pipes, home appliances, high-temperature equipment
- Prepainted Steel Coil / Prepainted Steel Coil (PPGI/PPGL) Prepainted steel coils are color-coated steel sheets made from hot-dip galvanized coils, aluminized zinc coils, or cold-rolled coils as substrates, through surface pretreatment, painting, and baking curing.
Substrate Types: Hot-dip galvanized substrate, aluminized zinc substrate, zinc-aluminum-magnesium substrate, cold-rolled substrate
Functional Coatings: Antistatic, heat insulation, self-cleaning, antibacterial, etc.
Application Areas: Building envelope, metal curtain walls, interior decoration, appliance housings
- Key Differentiators
1) Diverse Standards Coverage, Global Market Access
We support major global industrial standards, and our products comply with Chinese national standards (GB), American standards (ASTM), European standards (EN), Japanese standards (JIS), German standards (DIN), and British standards (BS). Whether the target market is North America, Europe, Southeast Asia, or the Middle East, we can provide products that meet local standards.
2) Diverse Coating Options
Customized coating solutions are available based on application scenarios:
Hot-dip galvanizing: Standard corrosion protection, high cost-effectiveness
Aluminized zinc: Corrosion resistance 2-4 times that of pure zinc
Zinc-aluminum-magnesium: Self-healing cuts, suitable for harsh environments such as photovoltaics and animal husbandry
Aluminized silicon: Hot-formed steel, suitable for automotive anti-collision components
Customized coatings: Coating weight can be customized from 120-600g/m² to meet different corrosion resistance requirements
3) Functional Color Coatings
Functional coatings: Antistatic, heat insulation, self-cleaning, antibacterial, and other functions are available
Customized colors: Matchable to RAL and Pantone color charts
Coating systems: Multiple options including polyester (PE), silicone-modified polyester (SMP), polyvinylidene fluoride (PVDF), and high-durability polyester (HDP)
- Quality Assurance Assurance
1) We have established a complete quality control system from raw materials to finished product delivery to ensure that every steel coil meets international standards.
*Raw material inspection: 100% spectral analysis of the chemical composition of materials to ensure compositional stability.
*Process control: Monitoring of heating temperature, rolling force, and cooling rate throughout the process.
*Mechanical property testing: Batch-by-batch tensile, bending, and impact tests to ensure yield strength and tensile strength meet standards.
*Hardness testing:
*Coating quality inspection: Testing of coating weight, adhesion, and uniformity.
2) Surface quality assurance: Coated coils: Chromate passivation treatment, with options for ordinary bright flakes, no bright flakes, etc.
3) Coated coils:
*Thickness tolerance: According to the corresponding substrate standard.
*Width tolerance: According to the corresponding substrate standard.
*Flatness requirements: Flatness improved by stretching and straightening.
4) International certifications
*ISO 9001:2015 Quality Management System
*CE certification (EN standard products)
*JIS certification (Japanese Industrial Standards)
*ASTM Certification (Meets US Standards)
*BV/SGS Third-Party Inspection Agency Accreditation
*EN 10204 3.1/3.2 Material Certificate Available
5) Digital Traceability System:
*Each steel coil is assigned a unique coil number, traceable to the raw material furnace number, production batch, rolling process parameters, and quality inspection records, ensuring that quality issues are traceable and manageable. Online inkjet marking includes information such as size, grade, batch number, coil number, and contract number.
6) Logistics Guarantee: Professional packaging: First wrapped with VCI anti-rust paper, then with polyethylene film, and finally covered with HDPE and secured with metal sheathing. Corner protectors are installed on the sides.
7) Sea Freight Packaging: Only non-wooden packaging is used, meeting international sea freight requirements.
8) Multiple Transportation Modes: Bulk carriers, containers, European freight trains, and air freight are all available.
9) Overseas Services: Overseas sales and service organizations can provide users with convenient, fast, and personalized services, as well as DDP supply chain services.
- OEM Customization Services: Thickness customization: Any thickness, accuracy up to ±0.03mm. Width customization: Can be slit. Coil weight: Standard or according to customer requirements, depending on transportation conditions. 4. Custom Coating
Coating Types: Pure Zinc, Zinc-Iron Alloy, Aluminum-Zinc, Zinc-Aluminum-Magnesium, Aluminum-Silicon
Coating Weight: Adjustable 60-600g/m² (double-sided)
Surface Treatment: Chromate Passivation, Chromium-Free Passivation, Oiling, No Oiling
Zinc Coil Surface: Zero Spangle, Regular Spangle, Small Spangle, Large Spangle
Aluminized Zinc Coil Surface: Fingerprint Resistant
- Custom Coating (Color Coated Coil)
Substrate Types: Hot-Dip Galvanized, Aluminized Zinc, Zinc-Aluminum-Magnesium, Cold Rolled
Coating Systems: Polyester (PE), Silicon-Modified Polyester (SMP), Polyvinylidene Fluoride (PVDF), High-Durability Polyester (HDP)
Functional Coatings: Antistatic, Thermal Insulation, Self-Cleaning, Antibacterial
Color Customization: Matches RAL and Pantone color charts; Logo customization supported.
- Customized Packaging and Labeling
1) Export Packaging: VCI rust-proof paper + PE film + HDPE + metal sheath, suitable for long-distance sea freight.
2) Side Corner Protectors: Corner protectors are installed on both sides of the steel coil to prevent damage during handling.
3) Customized Markings: Labels are affixed according to customer requirements (project name, furnace batch number, coil number, QR code, etc.).
4) Online Marking: Brand, specifications, weight, and other information are printed on the surface of the steel coil.
- OEM/ODM Services
OEM Branding: Customized product labels, packaging, and warranty certificates can be provided according to customer requirements, with a minimum order quantity of 25 tons.
ODM Development: Develop special grades or products with special performance according to customer needs.
