A 0.4mm PPGI coil is a pre-painted galvanized steel coil with a base thickness of 0.4 mm, coated with organic paint for color, corrosion resistance and long service life.
It is one of the most requested thicknesses for roofing sheets, wall panels and corrugated profiles in African, South Asian and Latin American markets.
This guide covers the full specifications, weight calculation, RAL colors, price factors and supplier checklist for buying a 0.4mm PPGI coil in bulk.
What Is a 0.4mm PPGI Coil?
PPGI stands for Pre-Painted Galvanized Iron. A 0.4mm PPGI coil starts with hot-dip galvanized steel, then receives primer and topcoat on a continuous coil-coating line.
Compared with bare galvanized coils, the painted surface adds color, UV resistance and 2–3 times longer service life for outdoor applications. Read our full introduction to color coated PPGI coil if you are new to this product.
When buyers search for a 0.4mm ppgi coil, they usually need a light, cost-effective material for roofing and cladding — not for heavy structural loads.
7 Key Specifications of 0.4mm PPGI Coil
1. Base Metal & Zinc Coating
The substrate is hot-dip galvanized steel (GI). Zinc coating ranges from Z40 to Z275 g/m², with Z60–Z120 the most common for 0.4mm PPGI coil exports.
For coastal or high-corrosion areas, a Galvalume (GL) substrate offers 2–4 times better edge corrosion resistance. See our comparison of PPGI vs PPGL coils.
2. Paint System: PE / SMP / HDP / PVDF
Topcoat options include polyester (PE), silicon-modified polyester (SMP), high-durability polyester (HDP) and PVDF (fluorocarbon).
PE is the most economical and covers about 80% of 0.4mm PPGI coil demand; PVDF is recommended for harsh climates and long-life roofs.
3. Thickness Tolerance
Standard tolerance for 0.4mm PPGI coil is typically ±0.02 mm, following JIS G3312 or EN 10169 production standards.
Always ask your supplier for the actual thickness report with the mill test certificate (MTC) before shipment.
4. Coil Width & Inner Diameter
Common widths are 600 mm, 1000 mm, 1200 mm and 1219 mm. Inner diameter is usually 508 mm or 610 mm.
Custom slitting is available — check our guide on prepainted galvanized steel coil specifications for full size ranges.
5. Coil Weight & Length
A 0.4mm PPGI coil with 1000 mm width weighs approximately 3.2–3.3 kg per meter, including zinc and paint layers.
Typical coil weights are 2–5 tons, which equals roughly 615 to 1,538 meters per coil. See the weight table below.
| Coil Weight (approx.) | Length at 0.4mm × 1000mm | Typical Use |
|---|---|---|
| 2 tons | ~615 m | Trial orders, small projects |
| 3 tons | ~923 m | Standard export coil |
| 5 tons | ~1,538 m | Bulk roofing projects |
Note: figures are calculated at ~3.25 kg/m for 1000 mm width with Z80 zinc; actual weight varies with width, zinc coating and paint system.
6. RAL Colors
Popular RAL colors for 0.4mm PPGI coil are RAL 9003 (signal white), RAL 5015 (sky blue), RAL 6005 (moss green) and RAL 3020 (traffic red).
Custom colors and patterns — wood grain, stone, brick or camouflage — can be produced with a minimum order quantity.
7. Standards & Certification
Common standards are ASTM A755, JIS G3312, EN 10169 and GB/T 12754. Ask for MTC, coating thickness report and, where needed, BIS / SASO / SONCAP certification.
0.4mm PPGI Coil Weight Calculator
To estimate weight: width (m) × length (m) × thickness (mm) × 7.85 = steel weight in kg, then add zinc and paint (roughly 0.08–0.12 kg/m²).
Example: 1 m × 1 m × 0.4 mm × 7.85 = 3.14 kg of steel, plus zinc and paint ≈ 3.25 kg per square meter at 1000 mm width.
This quick calculation helps you compare prices from different 0.4mm ppgi coil suppliers and verify whether the quoted weight is realistic.
0.4mm vs 0.5mm vs 0.3mm: Which Thickness to Choose?
| Item | 0.3mm | 0.4mm | 0.5mm |
|---|---|---|---|
| Weight per m (1000mm wide) | ~2.5 kg | ~3.25 kg | ~4.1 kg |
| Typical applications | Interior panels, temporary shelters | Roofing sheets, wall panels, corrugated profiles | Industrial roofs, load-bearing cladding |
| Cost level | Lowest | Balanced | Higher |
| Durability / strength | Low | Medium | High |
A 0.4mm ppgi coil is the sweet spot for roofing and cladding: light enough to keep freight costs low, yet strong enough for standard profiles. For heavy industrial roofs, move up to 0.5 mm.
Popular Applications of 0.4mm Color Coated Steel Coil
The most common uses are corrugated roofing sheets, sandwich panel outer skins, wall cladding, roll-formed profiles, ceiling tiles and fence panels.
It is also widely used for prefab houses, warehouses, farm buildings and container houses. See our guide on PPGI roofing sheets for profile options.
Because the material is light, shipping a 0.4mm PPGI coil maximizes container utilization — a practical advantage for importers comparing landed costs.
How Much Does a 0.4mm PPGI Coil Cost?
The price of a 0.4mm PPGI coil mainly depends on five factors: zinc coating weight, paint system, RAL color, coil width and order quantity.
PE + Z80 + standard RAL colors at container volume gives the best unit price; PVDF paint or custom patterns add a premium. Steel and zinc market prices also move monthly.
For the current FOB price of a 0.4mm PPGI coil, send your specifications (width, zinc, paint, color, quantity, destination port) and get an accurate quotation with a valid price validity period.
How to Choose a Reliable 0.4mm PPGI Coil Supplier
First, ask for mill test certificates and an independent coating thickness report. Second, request samples of RAL color cards before mass production.
Third, verify production capacity and lead time — a factory with in-house coating lines, like our PPGI production line, gives better quality control and delivery stability.
Finally, use our 9 tips to choose high-quality PPGI coil as a checklist before signing a contract. Never pay 100% in advance for a first order.
FAQ About 0.4mm PPGI Coil
Is a 0.4mm PPGI coil good for roofing?
Yes, for residential roofs, warehouses and farm buildings with standard purlin spacing. For heavy industrial or high-wind areas, 0.5 mm is safer.
How many meters are in a 3-ton 0.4mm PPGI coil?
Approximately 920 meters at 1000 mm width, calculated at about 3.25 kg/m. Confirm the exact figure with the supplier’s weight report.
What is the MOQ for 0.4mm PPGI coil?
Typical MOQ is one container (about 22–25 tons). Many suppliers, including Cybertron Metal, accept trial orders of 5–10 tons for new buyers.
Can I order custom RAL colors?
Yes. Standard colors like RAL 9003 and RAL 5015 ship fast; custom RAL or patterned finishes are available with a minimum production quantity.
Get Your 0.4mm PPGI Coil Quote Today
Send us your width, zinc coating, paint system, color, quantity and destination port. Our team will reply with a clear FOB / CIF quotation within 24 hours.
Need advice on choosing between 0.4mm and other thicknesses? Read our complete buying guide for PPGI coils or contact us directly — we help buyers complete projects, not just sell coils.