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G300 G550 Hot Dip DIN Galvanized Iron Coil Coating Z30-Z275g
| MOQ: | 5 tons |
| Price: | negotiate |
| Standard Packaging: | Standard seaworthy export packing or as customer demands |
| Delivery Period: | Negotiated |
| Payment Method: | T/T,Western Union,L/C |
| Supply Capacity: | 10000tons per month |
G550 galvanized iron coil
,G300 galvanized iron coil
,Z275g gi steel coil
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Type | Hot Dipped |
| Surface | Galvanized Coated |
| Surface Structure | Normal spangle coating(NS), minimized spangle coating(MS), spangle-free(FS) |
| Zinc Coating | 15-275g/m² |
| Thickness | 0.12mm-4.0mm |
| Width | 600mm-1250mm |
| Coil Weight | 3-5 Tons or Required |
| Coil ID | 508mm/610mm |
| Coating | PE/PVDF/HDP/SMP |
| Top Painting | 10-35 Microns |
| Back Painting | 5-35 Microns |
| MOQ | 5 Tons (1 20ft FCL) |
| Payment Term | T/T (30% Deposit + 70%) |
- Low processing cost: Hot-dip galvanizing rust prevention costs are lower than other paint coatings
- Multi-faceted protection: All parts of plated components receive zinc coating, including recesses, sharp corners, and hidden areas
- Simple inspection: Hot-dip galvanized layers can be tested visually and with simple non-destructive coating thickness gauges
Galvanized steel coil products are mainly used in construction, light industry, automotive, agriculture, animal husbandry, and fishing industries. Applications include building roofs, highway guardrails, sheet metal processing, roof grilles, household appliance enclosures, ventilation ducts, chimneys, kitchen utensils, grain storage and transportation, and frozen processing of meat and aquatic products.
Product packaging can be customized according to customer requirements and factory standards.
Zinc coating weight (also called zinc mass) is measured in g/m² (both sides total). It determines the corrosion resistance lifespan of the steel.
| Coating Mass (g/m²) | Typical Application |
|---|---|
| 40-80 | Indoor use, light protection |
| 100-140 | General construction, roofing |
| 180-275 | Heavy industry, structural components |
| 350-450 | Coastal areas, high-corrosion environments |
Note: Higher coating weight = longer service life = higher cost. We recommend selecting based on your actual environmental conditions.
Our galvanized steel coils comply with major international standards:
- ASTM A653 - American Standard
- JIS G3302 - Japanese Standard
- EN 10346 - European Standard
- GB/T 2518 - Chinese Standard
All products come with Mill Test Certificates (MTC) that can be provided upon shipment.
Spangle refers to the visible crystal patterns on the surface of galvanized steel, formed during the solidification of the zinc coating.
| Type | Description | Best For |
|---|---|---|
| Regular Spangle | Visible snowflake-like crystals | Applications where appearance is not critical; prepainted base |
| Zero Spangle | Smooth, uniform surface with no visible crystals | Painting applications, prepainted steel, automotive parts where surface smoothness matters |
Recommendation: If you plan to paint directly on the surface, zero spangle is strongly recommended for better paint adhesion.
While galvanized steel offers excellent corrosion protection, white rust (zinc oxide) can occur under certain conditions:
- Poor ventilation during storage
- High humidity or condensation
- Direct contact with rainwater
Prevention methods:
- Passivation treatment - We apply chromate or chromium-free passivation before shipment
- Oil coating - Anti-rust oil can be applied for ocean freight shipments
- Proper storage - Store in a dry, ventilated warehouse; avoid outdoor storage
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