Galvanized(GI) & Galvalume(GL) Steel Coils

Available Grades

DX51D+Z GI Common Forming Grade: Standard hot dipped galvanized grade, superior bending and stamping performance, the most used grade for general roofing, profiling and metal fabricated parts.
DX52D+AZ GL Deep Drawing Grade: Premium galvalume forming grade, uniform spangle surface, no coating crack during deep drawing, ideal for home appliance shell deep processing.
G30/G60/G90 Regular GI Grade: Classified by zinc coating weight, G90 with thick zinc layer delivers better anti-rust performance for outdoor exposed structural usage.
AZ50/AZ150 Standard GL Grade: Graded by aluminum-zinc coating mass, thick AZ coating provides 2-6 times longer service life than equal-weight GI for coastal projects.
S350GD High Strength GI/GL Grade: Structural high-hardness coated coil, high yield strength, designed for load-bearing roof purlin, steel frame and engineering bearing components.

Dual Anti-corrosion Mechanism: GI pure zinc provides sacrificial protection; GL aluminum-zinc alloy forms dense oxide barrier, resisting oxidation, rust and slight chemical erosion.
Uniform Compact Coating Layer: Continuous hot-dip process ensures even coating thickness, firm metallurgical bonding, no peeling, dropping or blistering during machining.
Excellent Machinability & Formability: Adapt bending, roll forming, punching, welding and cutting, suitable for one-time profiling into roof sheet, channel and customized profiles.
Diversified Surface Finish: Available big spangle, zero spangle, minimized spangle finish, meet decorative appearance and hidden engineering usage demands separately.
High Temperature Resistance(GL Exclusive): GL alloy coating withstand 310℃ long-term high temperature, not easy discoloration, fit high-heat workshop and exhaust equipment application.
Recyclable & Eco-friendly: Base carbon steel recyclable, non-toxic coating material, meet global environmental inspection for construction and industrial procurement.

Building Roof & Wall Cladding: Processed into corrugated roof sheet, wall panel and purlin for factory, warehouse and logistics park outer enclosure anti-rust structure.
Home Appliance Components: Zero-spangle GI/GL coil for refrigerator backboard, air conditioner frame, washing machine inner structural anti-rust parts.
Metal Hardware & Pipe Making: Raw material for galvanized steel pipe, metal bracket, fence post and stamped hardware accessories for outdoor municipal projects.
Coastal & Humid Area Engineering: High anti-salt GL coil for seaside plant, seaside guardrail, coastal residential building exterior anti-corrosion structure.
Prefab Container & Modular House: Base anti-rust material for movable container house wall, floor support plate, improving whole house service lifespan.
Automotive Underbody Parts: Anti-rust coated coil for vehicle chassis baffle, car body auxiliary structural parts, resist road water and mud corrosion.

Flexible Cost Matching: Cost-effective GI for inland low-budget projects; long-life GL cuts replacement frequency for coastal corrosive sites, optimize overall procurement cost.
Reduce Secondary Anti-rust Work: Factory finished hot-dip coating cancels on-site paint spraying, save labor, paint material and later periodic maintenance cost.
Lower Processing Rejection Rate: Stable coating adhesion and ductility avoid coating cracking during stamping, improve finished product yield for profile factories.
Global Standard Compatibility: Unified international coating standard, interchangeable size and grade, pass customs inspection easily for overseas engineering bidding.
One-stop Two-series Procurement: Supply both GI and GL coils in stock, support mixed container loading, simplify supplier management for steel distributors.

Adequate GI & GL Full Grade Stock: Complete coating weight & strength grades in warehouse, support mixed GI+GL container shipment, fast delivery for distributor bulk orders.
Strict Coating Quality Inspection: Conduct coating thickness, adhesion, salt spray test per batch, guarantee stable anti-rust performance for long-term use.
In-house Custom Processing: Offer fixed-width slitting, edge trimming, custom length cutting and surface film pasting, deliver directly processable coils.
Free Material Selection Guidance: Professional team recommend cost-effective GI or GL grade based on local climate, save customers unnecessary material cost.

Standard Seaworthy Anti-rust Package: Inner waterproof kraft paper + PE protective film, outer galvanized iron coil protector, steel strip reinforced bundling, anti-damp and anti-scratch for ocean transit.
Clear Standard Coil Marking: Mark grade, coating weight, thickness, width, coil ID and batch number on coil surface for quick receiving and quality tracing.
Customized Protective Packing: Custom zero-spangle dedicated packing, outer logo printing, customized 508mm/610mm inner coil diameter for brand sales.

Q: Core difference between GI and GL steel coil?
A: GI is pure zinc coated for low-cost inland anti-rust use; GL is Al-Zn silicon alloy coated, with 3-6 times longer service life, ideal for coastal salt fog environment.
Q: What spangle types can you supply?
A: Big spangle, minimized spangle and zero spangle are available, zero spangle fits painting and home appliance high-standard surface demand.
Q: What coating weight is the most popular?
A: Z120/Z180 GI and AZ70/AZ100 GL are hot-selling grades, balanced anti-corrosion performance and procurement cost for most projects.
Q: Can you slit custom narrow width coils?
A: Yes, we support slitting 20mm-1250mm arbitrary width, burr-free edge treatment for later pipe and profile processing.