GI and GL Steel Coil
Factory-Oriented GI and GL Steel Coil Supply With Export Experience
GL - Galvalume Steel Products
GI and GL Steel Coil Specification
| Parameter | GI (Galvanized Steel) | GL (Galvalume Steel) |
|---|---|---|
| Thickness | 0.115 mm - 2.0 mm | 0.115 mm - 1.5 mm |
| Width | 600 mm - 1250 mm | 600 mm - 1250 mm |
| Coating Weight | Z30 - Z275 g/m² | AZ30 - AZ275 g/m² |
| Standard | ASTM A653, EN 10346, JIS G3302 | ASTM A792, EN 10346, JIS G3321 |
| Steel Grade | DX51D, SGCC, CS Type A/B | SGLCC, DX51D+AZ |
| Surface / Spangle | Regular Spangle, Zero / Minimum Spangle, Big Spangle | Regular Spangle, Zero Spangle |
| Surface Treatment | Chromated, Oiled, Unoiled | Anti-fingerprint (AFP), Oiled |
| Coil Weight | 3 - 8 MT | 3 - 8 MT |
| Inner Diameter | 508 / 610 mm | 508 / 610 mm |
| Application | Roofing sheets, Ductwork, Structural panels, Home appliances | High-corrosion roofing, Industrial wall cladding, Automotive parts |
Factory to Delivery
Buyer Concern & FAQ
Q1: What is the difference between GI and GL steel, and how should I choose?
A: GI (Galvanized) uses a pure zinc coating, making it cost-effective for general roofing, ducts, and structural use. GL (Galvalume) uses a 55% aluminum-zinc alloy coating, offering superior corrosion and heat resistance—ideal for harsh coastal or high-humidity environments.
Q2: How do I choose the right coating weight (Z30–Z275 / AZ30–AZ275) for my market?
A: Standard indoor or mild environments usually require Z30–Z90 / AZ30–AZ50. For outdoor roofing, humid climates, or heavy-duty structural applications, we recommend Z100–Z275 / AZ70–AZ150 for longer service life. We can custom-tailor coating weights to match your local market and budget requirements.
Q3: How do you control GI and GL COIL thickness tolerance and coil weight accuracy?
A: We strictly produce according to international standards and contract specifications. Thickness tolerance is tightly controlled within ±0.02 mm, and actual coil weights strictly match the packing list. We also support third-party pre-shipment inspections (SGS, BV) upon request.
Q4: What is your standard production lead time and minimum order support?
A: Standard production takes 15 to 25 days. We offer flexible MOQ and custom sizing (width, thickness, and coil weight) to fit your precise processing or distribution needs.
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