Precision Gauge Zinc-Iron Alloy Coated Gi Coil 0.12-4.0mm
Brand Name:YINGHANG
Certification:ATSM
Model Number:0.4mm-4mm
Minimum Order Quantity:25tons
Delivery Time:15days after deposit
Payment Terms:T/T, L/C
Contact Now
Add to Cart
Verified Supplier
Location:
Shijiazhuang Hebei China
Address:
Shijiazhuang City, Hebei, China
Supplier`s last login times:
within 1 hours
Product Details
Company Profile
Product Details
Galvanized Steel Coil: Superior Corrosion Protection for Demanding
Applications
Galvanized steel coil represents a fundamental industrial material
manufactured by applying a protective zinc coating to premium
cold-rolled or hot-rolled steel substrates through advanced
galvanizing processes. This treatment forms a dense, adherent zinc
layer on the steel surface, providing exceptional resistance to
corrosion and significantly extending the service life of the base
metal in diverse and challenging environments. Offering outstanding
manufacturability (including stamping, bending, welding), excellent
surface quality, and a comprehensive range of specifications
(thickness: 0.12-4.0 mm, width: 30-1500 mm), galvanized steel coil
serves as an indispensable raw material across numerous sectors
such as construction, appliance manufacturing, automotive, general
machinery, and agricultural equipment. It underpins the reliability
and efficiency of modern manufacturing processes.
Core Specifications & Parameters:
Parameter Range / Options Notes
Thickness (mm) 0.12 - 4.0 Covers ultra-thin gauges to heavy plate
Width (mm) 30 - 1500 Accommodates narrow strip to wide sheet
Coating Weight Standard: Z60-Z275 (g/m²) Customizable (e.g., Z100,
Z180, Z275)
Surface Finish Regular Spangle, Minimized Spangle, Spangle-Free
Aesthetic and functional options
Coating Type Hot-Dip Galvanized (GI) May include Galvannealed (GA)
option
Steel Grade Commercial Quality (CQ), Forming (FQ), Structural (SS
Grades), High Strength Low Alloy (HSLA) Suits various mechanical
property needs
Standards ASTM A653/A653M, JIS G 3302, EN 10346, GB/T 2518
Compliant with major international norms
Distinctive Features & Manufacturing Advantages:
Robust Corrosion Resistance: The zinc coating acts as a highly
effective sacrificial barrier, shielding the underlying steel from
oxidation, rust, and atmospheric degradation, even in coastal or
industrial environments. This extends service life by 5-8 times
compared to uncoated steel.
Enhanced Durability & Longevity: The metallurgical bond between
zinc and steel ensures coating adhesion during forming, cutting,
and service, providing long-term protection against scratches and
abrasion.
Superior Formability & Weldability: Designed for seamless
integration into manufacturing processes, our coils exhibit
excellent ductility for deep drawing, bending, and roll forming,
alongside compatibility with common welding techniques (spot, MIG,
TIG).
Consistent Surface Quality: Precise process control delivers
uniform coating thickness, minimal defects, and aesthetically
pleasing finishes (spangled or smooth) suitable for both exposed
and painted applications.
Cost-Effectiveness: Offers an optimal balance between initial
material cost and lifecycle value due to reduced maintenance,
replacement frequency, and downtime associated with corrosion
failure.
Environmental Sustainability: Zinc is a naturally occurring,
abundant, and recyclable element. Galvanized steel is 100%
recyclable without loss of properties, contributing to circular
economy principles.
Key Applications & End-Use Sectors:
The versatility and protective qualities of galvanized steel coil
make it essential in countless applications:
Construction: Roofing & wall cladding, structural frames, purlins,
trusses, gutters, downpipes, ductwork, scaffolding, formwork, light
steel framing (LSF).
Automotive: Body panels (underbody components, brackets,
reinforcements), chassis parts, fuel tanks, exhaust systems (heat
shields), truck trailers, bus frames.
Appliances: Washing machine drums, refrigerator cabinets & liners,
oven housings, air conditioner casings, water heater tanks,
microwave oven chassis.
Industrial & Agricultural: Storage tanks, silos, grain bins, HVAC
equipment, electrical enclosures, switchboards, conveyor systems,
guardrails, fencing, farm equipment (hoppers, feeders, trailers).
Consumer Goods: Shelving units, furniture frames, lighting
fixtures, filing cabinets, toolboxes, signage, and various metal
containers.
Technology & Underlying Principles:
The predominant technology is Continuous Hot-Dip Galvanizing. The
process involves:
Cleaning: Steel strip is thoroughly cleaned (alkaline cleaning,
acid pickling) to remove oxides, oils, and mill scale, ensuring
perfect zinc adhesion.
Annealing (Optional for CQ/FQ): Strip may be annealed in a reducing
atmosphere to restore ductility.
Fluxing: The strip passes through a zinc-ammonium chloride flux
solution to prevent oxidation before immersion.
Galvanizing: The clean, fluxed strip is immersed in a molten zinc
bath (typically ~450°C / 842°F). A metallurgical reaction occurs
between the iron in the steel and the molten zinc, forming a series
of zinc-iron alloy layers bonded to the steel substrate, topped by
a layer of nearly pure zinc.
Wiping & Cooling: As the strip exits the bath, air knives precisely
control the thickness of the outer zinc layer. The coil is then
cooled, solidifying the coating.
Passivation & Oiling (Optional): Surface treatments like chromate
passivation or oiling may be applied for enhanced corrosion
resistance during transit/storage or improved paintability.
Galvannealed (GA) Option: If specified, the hot-dip coated strip
undergoes an additional heat treatment immediately after
galvanizing. This diffusion process converts the entire coating
into a zinc-iron alloy layer, resulting in a matte grey finish with
superior paint adhesion, weldability, and resistance to powdering
during forming.
Our advanced galvanizing lines ensure precise control over coating
weight, surface finish, and mechanical properties, delivering coils
that meet the most stringent performance requirements for your
specific industrial challenges.
Precision Gauge Zinc-Iron Alloy Coated Gi Coil 0.12-4.0mm
Inquiry Cart
0