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Prepainted Steel Coil - High-Quality Pre-Coated Metal for Construction & Appliances
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Prepainted Steel Coil
| Property | Parameter | Description |
|---|---|---|
| Product Name | Prepainted Steel Coil (PPGI/PPGL) | Color-coated steel coil with protective paint layer |
| Base Material | Hot-dip Galvanized (GI) / Galvalume (GL) | Zinc or Al-Zn alloy coated substrate |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, GB/T 12754 | Meets major international standards |
| Substrate Grade | SGCC, DX51D, S250GD, CS Type B | Common commercial and structural grades |
| Zinc Coating Weight | 60 - 275 g/m² | Total zinc coating on both sides |
| Thickness Range | 0.12 - 1.2 mm | Base metal thickness before painting |
| Width Range | 600 - 1250 mm | Standard and custom widths available |
| Coil Weight | 3 - 8 tons | Typical coil weight per unit |
| Top Paint System | PE, SMP, HDP, PVDF | Polyester, silicone modified, high durability, fluorocarbon |
| Top Coat Thickness | 15 - 25 μm | Front side paint film thickness |
| Back Coat Thickness | 5 - 15 μm | Reverse side protective coating |
| Pencil Hardness | ≥2H (PE) / ≥3H (PVDF) | Surface hardness per ASTM D3363 |
| Gloss Level (60°) | 20 - 80% | Adjustable gloss from matte to high gloss |
| T-Bend | ≤2T (PE) / ≤1T (HDP) | Flexibility performance per ASTM D4145 |
| Color Options | RAL, Pantone, custom colors | Wide range of standard and custom colors |
| Application | Roofing, wall cladding, sandwich panels, appliances | Construction and manufacturing industries |
| Certification | ISO 9001, EN 10204 3.1, SGS, BV | Quality and inspection certifications |
| Packaging | Eye-to-sky, waterproof paper, steel strip | Standard seaworthy export packaging |
| MOQ | 5 tons | Minimum order quantity per color |
Prepainted Steel Coil - High-Quality Pre-Coated Metal for Construction & Appliances
Prepainted steel coil (PPGI/PPGL) is a factory-finished coated metal product manufactured by applying organic paint coatings onto galvanized or galvalume steel substrates through a continuous coil coating line. This pre-coated material delivers exceptional color consistency, superior weather resistance, and long-lasting surface protection, making it the preferred choice for building cladding, roofing panels, household appliances, and interior decoration projects worldwide. As a direct mill supplier, we provide premium grade prepainted steel coil with coating thickness ranging from 15 to 25 microns on the top surface, ensuring reliable performance across diverse industrial and commercial applications.
What Is Prepainted Steel Coil?
Prepainted steel coil refers to cold-rolled steel strip that has been hot-dip galvanized (or galvalume-coated) and subsequently painted with one or more layers of organic coatings in a controlled factory environment. The continuous coil coating process—comprising chemical pretreatment, primer application, and topcoat finishing—produces a uniform, defect-free painted surface that outperforms post-fabrication painting in both adhesion strength and coating uniformity.
Prepainted Steel Coil Technical Specifications
Our pre-coated steel coils are manufactured according to ASTM A755/A755M, EN 10169:2012, and JIS G3312 standards. The following table outlines key parameters:
| Parameter | Specification |
|---|---|
| Base Metal Substrate | SGCC, DX51D+Z, S250GD+Z |
| Zinc Coating Weight | 60–275 g/m² per ASTM A653 |
| Steel Thickness | 0.12 mm – 1.2 mm |
| Coil Width | 600 mm – 1,250 mm |
| Top Coat Thickness | 15–25 μm (PE, SMP, HDP, PVDF) |
| Back Coat Thickness | 5–10 μm |
| Pencil Hardness | ≥ 2H (PVDF system) |
| T-Bend Flexibility | ≤ 2T (PE coating) |
| Gloss Range (60°) | 10–90% adjustable |
| Color Options | RAL, Pantone, or custom match |
Coating Systems and Performance Characteristics
Different topcoat paint systems serve distinct application requirements. Polyester (PE) coatings offer cost-effective performance with 8–10 years of outdoor durability, while Silicon Modified Polyester (SMP) extends service life to approximately 15 years. For projects demanding exceptional UV resistance and color retention, High Durability Polyester (HDP) and Polyvinylidene Fluoride (PVDF) coatings deliver 20–30 years of proven weathering performance, complying with AAMA 621 specifications. Each prepainted steel coil undergoes rigorous quality testing including salt spray resistance exceeding 500 hours per ASTM B117, cross-cut adhesion rated at 0 grade per ISO 2409, and MEK rub resistance above 100 double rubs.
Key Applications of Prepainted Steel Coil
- Building & Construction: Metal roofing sheets, wall cladding panels, sandwich panel facings, roller shutter doors, and corrugated profiles
- Home Appliances: Refrigerator side panels, washing machine housings, air conditioner casings, and microwave oven shells
- Furniture & Interior: Modular partition systems, ceiling tiles, whiteboard surfaces, and decorative laminates
- Industrial Use: Electrical enclosures, grain storage bins, clean room panels, and transportation containers
Frequently Asked Questions
What is the minimum order quantity (MOQ)?
Our standard MOQ for prepainted steel coil is 25 metric tons per color and specification. For trial orders or special RAL colors, we accommodate smaller quantities starting from 5 tons subject to production scheduling.
Do you provide material test certificates?
Yes. Every shipment includes mill test certificates (MTC) per EN 10204 Type 3.1, covering mechanical properties, zinc coating weight, paint film thickness, adhesion test results, and chemical composition of the base metal.
What is the typical delivery time?
Standard colors in stock ship within 7–10 working days. Custom color-matched prepainted steel coil orders require 20–30 days for production, coating, and quality inspection before dispatch.
Can you supply custom sizes and colors?
Absolutely. We offer precision slitting to widths from 30 mm to 1,250 mm, cut-to-length processing, and color matching to any RAL, Pantone, or customer-supplied sample with Delta E ≤ 1.5 color accuracy.
Get a Competitive Quote for Prepainted Steel Coil
Looking for factory-competitive pricing on pre-coated steel coils tailored to your project specifications? Contact our sales team today with your required substrate grade, coating system, color, thickness, and quantity. We provide detailed quotations within 24 hours, supported by free sample swatches and comprehensive technical guidance to help you select the optimal prepainted steel coil solution for your application.
Ratings & Reviews
Know your supplier
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
