Description
Factory-Direct Galvanized Sheets — Every coil passes thickness gauge testing before shipment, ensuring zinc coating meets your specified Z181–Z275 range without surprise rejections at destination.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Cold Rolled Galvanized Steel Sheet |
| Product Type | Steel Sheet (Galvanized) |
| Steel Grade | DX51D, DX52D, DX53D, DX54D, S220GD, S250GD, S280GD, S350GD, S550GD, SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490, SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC490, SGC570, CQ, FS, DDS, EDDS |
| Standard | ASTM A653, JIS G3302, EN 10143, AISI, DIN, GB |
| Thickness | 0.12mm–3.0mm |
| Width | 600mm–1500mm |
| Zinc Coating | Z181–Z275 (30g–275g/m²) |
| Technique | Cold Rolled Based / Hot Dipped Galvanized |
| Surface Treatment | Passivation, Oiling, Skin Pass, Anti-fingerprint |
| Surface Structure | Zero Spangle / Small Spangle / Regular Spangle / Big Spangle |
| Tolerance | ±5% |
| Coil ID | 508mm / 610mm |
| Coil Weight | 3–20 metric tons per coil |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Pipe making, Cutting sheets, Small tool manufacturing, Corrugated sheet production, Container manufacturing, Fence production, Greenhouse structures, Building construction, Scaffolding, Low-pressure fluid transport |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Corrugated roofing and wall cladding, scaffolding planks, greenhouse frames |
| Manufacturing & Fabrication | Container body panels, fence panels, small tool housings |
| Pipe & Tube Production | Welded pipe making for low-pressure fluid transport (water, gas, oil) |
| Building Envelope | Indoor and outdoor building sheets, facade backing panels |
What Zinc Coating Inconsistency Costs on a Fabrication Order
Coating adhesion failure during bending means scrap metal, not finished parts.
When buyers source Cold Rolled Galvanized Steel Sheet for cutting and bending fabrication, zinc flaking at fold lines or inconsistent thickness across the coil width creates downstream rejection. I once shipped cold rolled galvanized sheet to a Riyadh curtain wall project — the client cut and bent it into connection brackets, only to find the zinc coating measured barely 30 microns against the contracted 60 microns. The entire batch was rejected, and air-freighting replacement material wiped out the margin. Since that job, every sheet leaving our facility passes through a coating thickness gauge before loading. [NEED_CITE: zinc coating adhesion requirements for cold-formed galvanized sheet per ASTM A653]
Matching Coating Weight and Spangle to Fabrication Demands
For fabrication shops cutting and bending Cold Rolled Galvanized Steel Sheet into brackets, connectors, or corrugated profiles, the zinc coating weight and spangle selection directly affect both corrosion performance and surface finish after forming. Our skin-pass treatment ensures a flat, consistent surface that holds coating integrity through bending without flaking — critical when the finished piece goes into visible facade connections or outdoor greenhouse frames. We supply Z181 through Z275 coating weights across zero spangle to regular spangle finishes, letting specifiers match indoor decorative applications or heavy outdoor exposure without ordering multiple batches from different sources.
Formability, Standards, and Site Compliance
Cold rolled galvanized sheet used for pipe making, container panels, and scaffolding must meet dimensional tolerances per EN 10143 and coating weight requirements per ASTM A653 or JIS G3302 depending on destination market. The DX51D/SGCC commercial grades handle standard bending and punching, while structural grades like S250GD and S350GD carry higher yield strength for load-bearing frame members. For EU-bound shipments, CE marking and EN-compliant mill certificates determine whether customs clears the cargo or holds it at port. [NEED_CITE: EN 10143 dimensional tolerance requirements for cold formed galvanized flat products]
Understanding Grade Selection and Coating Technology
The DX series (DX51D through DX54D) follows the EN 10346 designation system, where increasing numbers indicate deeper drawing capability — DX51D suits general forming, while DX54D handles deep-drawn profiles without necking. The SGCC/SGCD series under JIS G3302 serves the same purpose in the Japanese standard framework. Structural grades S220GD through S550GD add minimum yield strength requirements for load-bearing applications like scaffolding and greenhouse structural members. The hot-dip galvanizing process over a cold rolled substrate delivers coating metallurgical bonding that resists flaking during bending — unlike electro-galvanized alternatives where coating adhesion fails at tight radii. Zero spangle finishes provide a uniform painted surface for architectural cladding, while regular spangle offers cost-effective corrosion protection for industrial fencing and container bodies.
Hidden Costs of Unverified Coating and Grade Mismatch
Ordering Cold Rolled Galvanized Steel Sheet without mill test certificate verification or third-party inspection creates risk across the entire project chain. Coating weight below specification accelerates corrosion in outdoor applications, forcing premature replacement. Grade substitution — receiving SGHC when SGCC was ordered — causes cracking during bending operations, generating scrap and delaying fabrication schedules. Missing CE documentation or incorrect standard references on certificates block EU customs clearance, incurring demurrage charges that exceed the material cost difference. [NEED_CITE: consequences of non-compliant galvanized coating in structural applications]
Procurement Confidence from Mill to Site
Our Shandong facility operates dedicated cold rolled galvanizing lines with in-house physical and chemical laboratories testing every coil for coating weight, adhesion, and dimensional accuracy before release. We hold ISO 9001:2015 certification alongside SGS and BV verification, providing complete documentation packages for regulated markets. With 2,800+ specifications across our tube and section steel divisions, we consolidate sheet and profile orders into single-source supply, reducing procurement overhead and ensuring consistent material traceability. Custom non-standard widths and cut-to-length sheets ship with professional container loading that protects zinc coating integrity during ocean transit. Every shipment includes heat number traceability from raw coil to finished sheet.
Documentation & Compliance
- Mill test certificate documenting DX51D/SGCC chemical composition and zinc coating weight per ASTM A653 or EN 10346
- CE certificate confirming compliance with EN 10143 dimensional tolerances for EU market entry
- ISO 9001:2015 quality management certificate covering production and testing processes
- SGS or BV third-party inspection report available upon request for coating weight and surface quality verification
- Material traceability by heat number linking each coil to production batch and test results
- Complete customs documentation including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Cold rolled galvanized coils bundled with steel strips and edge protectors to preserve zinc coating during ocean transit
- Surface protection through passivation and oiling treatment prevents white rust formation during storage and shipping
- Cut-to-length sheets stacked with interleaving paper and wrapped in moisture-proof film for container loading
- Coil weight optimization (3–20 metric tons) maximizes container payload for 20ft and 40ft shipments
- Heat number and grade identification marked on each bundle for site traceability and inspection
- FOB, CIF, and DDP shipping terms available with professional loading supervision
Start Your Procurement with Complete Specifications
Submit your Cold Rolled Galvanized Steel Sheet requirements including thickness, width, zinc coating weight, spangle preference, and destination port — we respond within 12 hours with pricing, lead time, and available mill test certificates. For fabrication projects requiring cut-to-length sheets or specific coil weights, our team confirms custom processing capabilities and container loading plans before contract signing.
Request Quotation and Material Certification
Share your specifications and quantity to receive detailed pricing with mill test certificate samples and third-party inspection options.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Frequently Asked Questions
Q: What is the difference between zero spangle and regular spangle galvanized sheet?
A: Zero spangle provides a uniform, smooth surface ideal for painting or visible architectural applications, while regular spangle shows the characteristic zinc crystalline pattern and offers cost-effective corrosion protection for industrial and structural use where appearance is secondary.
Q: Can the galvanized sheet be bent without coating cracking?
A: Yes, our cold rolled galvanized sheet undergoes skin-pass treatment that ensures coating adhesion during bending operations. The hot-dip galvanizing process creates metallurgical bonding between zinc and steel substrate, preventing flaking at standard bend radii per ASTM A653 forming guidelines.
Q: What zinc coating weight is suitable for outdoor vs indoor applications?
A: For indoor applications with minimal moisture exposure, Z181 (30g/m²) provides adequate protection. Outdoor applications, coastal environments, or greenhouse structures benefit from Z275 (275g/m²) coating weight for extended corrosion resistance.
Q: Do you provide cutting-to-size and decoiling services?
A: Yes, we offer welding, punching, cutting, bending, and decoiling processing services. Cut-to-length sheets are stacked with protective interleaving and packaged for container shipment with edge protection.
Q: What certifications are available for EU market entry?
A: We provide CE certification confirming EN 10143 compliance, ISO 9001:2015 quality certificate, and mill test certificates. Third-party inspection through SGS or BV is available for additional verification before shipment.
Get Factory-Direct Pricing with Full Certification
Send your Cold Rolled Galvanized Steel Sheet specifications — thickness, width, coating weight, and quantity — to receive quotation with mill test certificate samples within 12 hours.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
