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Colour-coated galvanized coil for compatible roofing, wall panels, rainwater goods and formed building components. Specify the steel substrate, metallic coating and paint system separately: a colour code alone does not define corrosion performance, forming behaviour or service life.
QIDA METAL · MATERIALS & EXPORT SUPPLY
Prepainted Galvanized Steel Coil | DX51D+Z
Colour-coated galvanized coil for compatible roofing, wall panels, rainwater goods and formed building components. Specify the steel substrate, metallic coating and paint system separately: a colour code alone does not define corrosion performance, forming behaviour or service life.
| Ordering item | Specification |
|---|---|
| Material / standard | EN 10169 organic coating / EN 10346 DX51D+Z substrate |
| Product family | Steel Coils |
| Supply basis | Enquiry-based grade, dimensions, processing and quantity; availability, MOQ and delivery confirmed in the quotation. |
| Inspection documents | Request heat/batch records and EN 10204 3.1 or other documents where required; actual document scope must be confirmed. |
01 / Selection Advantages
- One enquiry can define base thickness, zinc mass, paint system and colour approval.
- Coil dimensions and packing orientation can be aligned with the buyer’s forming line.
- Separate metallic and organic coating acceptance avoids confusing zinc g/m² with paint thickness in micrometres.
02 / Specifications & Size Schedule
Use the following options to prepare a complete enquiry. The lists do not imply that every dimension combination is stocked or interchangeable with another standard. State the required tolerances and quantity for each line.
| Parameter | Enquiry requirement |
|---|---|
| Base metal thickness / mm | 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.60, 0.80, 1.00 |
| Width / mm | 600–1250 enquiry range; usable coverage after forming is a different value |
| Metallic coating | Z designation and minimum mass to be agreed; g/m² refers to both faces combined |
| Organic coating | Polyester or specified system; example enquiry 25 µm nominal front coating, subject to confirmed build |
| Colour / gloss | RAL reference plus approved physical sample and agreed colour-difference/gloss limits |
| Coil build | 508 / 610 mm ID enquiry options; maximum OD/mass and winding direction to be confirmed |
| Order element | Example way to specify | Buyer check |
|---|---|---|
| Thickness | 0.50 mm base steel | State base thickness versus total coated thickness |
| Zinc | Z275 if required by the project | 275 g/m² combined both faces; confirm coating designation |
| Paint | Polyester, agreed front/back build | Confirm primer/topcoat and backing requirements |
| Colour | Agreed RAL reference and sample | Colour reproduction on a screen is insufficient |
| Coil | Agreed ID, width and unit mass | Check decoiler and lifting limits |
03 / Chemical Composition
Composition is expressed in weight percent. Maximum and minimum limits refer to the listed grade/product reference; final acceptance follows the agreed standard edition and heat analysis.
| Element | Grade reference / wt.% |
|---|---|
| C | ≤0.18 |
| Si | ≤0.50 |
| Mn | ≤1.20 |
| P | ≤0.12 |
| S | ≤0.045 |
| Ti | ≤0.30 |
| Fe | Balance |
04 / Mechanical Properties & Technical Notes
| Substrate condition | Yield | Tensile / MPa | A80 elongation |
|---|---|---|---|
| DX51D reference | No specified minimum in this grade table | 270–500 | ≥22% at reference thickness; thin-gauge reductions apply |
The strength/elongation values describe the substrate, not the paint. For DX51D, the referenced EN 10346 table reduces elongation by 2 percentage points at 0.5 < t ≤0.7 mm and by 4 points at t ≤0.5 mm. Coating durability classes, adhesion, UV resistance and warranty terms must be expressly confirmed; no brand coating performance is implied.
05 / Processing & Inspection
| Control point | What to agree or inspect |
|---|---|
| Substrate | Verify base thickness, grade and metallic-coating designation. |
| Paint acceptance | Agree dry-film thickness, adhesion/bend tests, colour and gloss. |
| Forming trial | Check minimum bend radius, coating flexibility and film protection for the buyer’s profile. |
| Coil inspection | Check edge condition, winding, telescoping, surface defects and traceable labels. |
Include additional tests, third-party inspection, marking transfer and processing requirements before order confirmation. Qida can coordinate the agreed inspection scope and supporting records; an online product guide is not a delivered-batch test certificate.
06 / Export Packaging & Transport
| Packing item | Practical requirement |
|---|---|
| Coil protection | Provide suitable bore, edge and circumference protection. |
| Moisture | Keep coils dry and protected from condensation and prolonged outdoor exposure. |
| Restraint | Select supports and blocking for coil orientation and mass. |
| Unloading | Agree lifting method and avoid chain/metal contact on finished faces. |
Agree destination port, Incoterms rule and named place, package mass, unloading equipment and required shipping documents. Container capacity depends on payload limits, route and load distribution. For regulated solid-wood packaging, confirm the applicable ISPM 15 treatment and marking requirements.
07 / Qida Procurement Support
| Order stage | Our coordination | Buyer benefit |
|---|---|---|
| Specification review | Review material, dimensions, units, drawings and destination requirements. | A clear line-by-line enquiry helps reduce omissions and incompatible substitutions. |
| Processing plan | Confirm cutting, finishing, inspection and identification items in writing. | The buyer can assess scope and acceptance before production or sourcing proceeds. |
| Packing & dispatch | Coordinate labels, packing list, suitable protection and shipping-document requirements. | Piece count and heat/lot correspondence can be checked at agreed milestones. |
| After-sales follow-up | Review order references, arrival photos and inspection records for reported issues. | A documented issue description supports a specific response and follow-up. |
08 / Request a Detailed Quotation
Send the standard and edition, grade, size schedule, quantity per size, material condition, finish, processing drawings, tests/documents, packing requirements and destination port. Include maximum piece or package weight and any project approval requirements. Pricing, minimum quantity and lead time will be confirmed against the actual requirement.
Shandong Qida Metal Technology Co., Ltd. · Liaocheng, Shandong, China
qidamt@163.com · +86 139 6951 8618
Technical References
The primary references below support material selection and enquiry preparation. They do not certify a delivery batch or imply an affiliation with their publishers. Product form, condition, standard edition and supplementary requirements must be agreed in the purchase specification.
