Hot Dipped Galvanized Steel Coil - High-Quality Corrosion-Resistant Steel for Industrial Use

Baiqu Steel Coil Manufacturing Co., Ltd.

Verified Custom manufacturer 4yrs

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Technical Specifications of Hot Dipped Galvanized Steel Coil

Property	Parameter	Description
Product Name	Hot Dipped Galvanized Steel Coil	Carbon steel coil with zinc coating by hot dip process
Base Material Grade	SGCC / DX51D / CS Type B / Q235B	International grade equivalents
Standard Compliance	ASTM A653, EN 10346, JIS G3302, GB/T 2518	Meets major international standards
Manufacturing Process	Continuous Hot Dip Galvanizing	Steel strip immersed in molten zinc bath
Carbon (C)	≤0.12%	Low carbon for formability
Manganese (Mn)	≤0.60%	Improves strength and hardness
Phosphorus (P)	≤0.045%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for weldability
Zinc Coating Weight	60-275 g/m² (Z60-Z275)	Double-sided total coating mass per ASTM A653
Tensile Strength	270-500 MPa	Varies by grade and temper
Yield Strength	140-350 MPa	Varies by grade and temper
Elongation	≥18%	Ductility in 50mm gauge length
Thickness Range	0.12 - 4.0 mm	Available thickness options
Width Range	600 - 1500 mm	Standard and custom widths
Coil Weight	3 - 25 tons	Standard coil weight range
Spangle Type	Regular / Minimized / Zero Spangle	Surface crystallization pattern options
Surface Treatment	Chromated, Oiled, Non-chromated, Passivated	Anti-fingerprint and corrosion protection options
Application	Construction, Roofing, HVAC, Automotive, Appliances	Typical application industries
Certification	EN 10204 3.1, ISO 9001, SGS, BV	Quality certifications provided
MOQ	25 tons	Minimum order quantity

Hot Dipped Galvanized Steel Coil - High-Quality Corrosion-Resistant Steel for Industrial Use

Hot dipped galvanized steel coil is a carbon steel substrate coated with a protective zinc layer through immersion in a molten zinc bath at approximately 460°C. This continuous coating process creates a metallurgically bonded zinc-iron alloy layer that delivers exceptional durability against corrosive environments. Serving critical roles in construction, automotive manufacturing, and infrastructure development, hot dipped galvanized steel coil remains the preferred material for projects demanding long service life with minimal maintenance. As a mill-direct supplier, we provide premium grade galvanized coils manufactured according to ASTM A653/A653M and EN 10346:2015 standards, ensuring consistent coating uniformity and superior mechanical performance for global buyers.

What Is Hot Dipped Galvanized Steel Coil?

Hot dipped galvanized steel coil refers to cold-rolled or hot-rolled steel strip that has been continuously passed through a molten zinc bath, producing a tightly adherent zinc coating ranging from Z60 to Z600 (60–600 g/m²). The resulting zinc layer acts as both a physical barrier and a sacrificial anode, protecting the base steel even when the surface is scratched or cut. This dual protection mechanism distinguishes hot dip galvanizing from electro-galvanizing and other surface treatments.

Hot Dipped Galvanized Steel Coil Technical Specifications

Our galvanized steel coils are produced to meet rigorous international standards. Below are the key parameters:

Parameter	Specification
Base Steel Grade	SGCC, DX51D+Z, CS Type B, SS Grade 33
Thickness	0.12 mm – 4.0 mm
Width	600 mm – 1500 mm
Zinc Coating Weight	Z60 – Z600 (60–600 g/m²) per ASTM A653
Spangle	Regular spangle, minimized spangle, zero spangle
Surface Treatment	Chromate-passivated, oiled, anti-fingerprint, skin-pass
Yield Strength	≥ 205 MPa (DX51D+Z per EN 10346)
Tensile Strength	270–500 MPa depending on grade
Coil Weight	3–12 metric tons
Standards	ASTM A653/A653M-20, EN 10346:2015, JIS G3302

Key Applications of Galvanized Steel Coil

Building & Construction: Roofing sheets, wall cladding, structural purlins, and light-gauge steel framing
Automotive Industry: Body panels, chassis components, and underbody structural parts
Home Appliances: Washing machine drums, air conditioning housings, and refrigerator panels
Infrastructure: Highway guardrails, signage poles, cable trays, and drainage systems
Agriculture: Grain storage silos, greenhouse frames, and fencing materials

Why Choose Our Hot Dipped Galvanized Steel Coil?

We operate with an annual production capacity exceeding 500,000 metric tons, sourcing base coils from ISO 9001:2015 certified mills. Each galvanized coil ships with a mill test certificate (MTC) compliant with EN 10204 Type 3.1, documenting chemical composition, mechanical properties, and coating weight verification. Our in-house laboratory performs salt spray testing per ASTM B117, guaranteeing a minimum of 72 hours of white rust resistance for standard Z275 coatings. Factory-competitive pricing and flexible processing capabilities set us apart from conventional trading companies.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 25 metric tons per specification. For trial orders or mixed containers, we accept quantities as low as 10 metric tons subject to current stock availability.

Hot dipped galvanized steel coil supplier

Do you provide material test certificates?

Yes. Every shipment includes an EN 10204 Type 3.1 mill test certificate covering chemical analysis, mechanical properties, zinc coating mass, and bend test results.

Hot dipped galvanized steel coil wholesale

What is the typical delivery time?

Stock items ship within 7–10 business days. Custom-produced hot dipped galvanized steel coil orders with specific coating weights or non-standard widths typically require 20–30 days from order confirmation.

Can you cut to custom sizes?

Absolutely. We offer slitting to narrow strips (minimum 30 mm width) and cut-to-length sheet processing with ±0.5 mm dimensional tolerance, all performed on precision leveling and slitting lines.

Hot dipped galvanized steel coil China

Get a Competitive Quote for Hot Dipped Galvanized Steel Coil

Ready to secure value-driven pricing on galvanized steel coils tailored to your project specifications? Contact our sales team today with your required grade, thickness, coating weight, and quantity. We respond to all inquiries within 12 hours with a detailed quotation including CIF/FOB terms, packaging options, and estimated delivery schedule. Let us be your trusted galvanized coil supply partner.

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Chris Martin

Canada

verified purchases

2025-08-22

Acceptable Galvanized Coil Quality — Communication Issue Resolved
Ordered 20 tons of CS Type B, Z180 coating, 1.5mm thickness for light-gauge steel framing components. The material itself met ASTM A653 mechanical specs and coating weight was verified at 182 g/m². However, there was an initial mix-up on the surface treatment — we specified oiled finish but the first production confirmation showed chromate-passivated. We caught this during document review before production started and the team corrected it, but it caused a 4-day delay to our schedule. After the correction, the coils were produced and shipped correctly within the revised timeline. Supplier was responsive once the issue was escalated. Quality of the final product was fine for our application. Would consider reordering with clearer order confirmation procedures in place.

Wei Chen

Singapore

verified purchases

2025-09-14

Solid HDG Coil for Re-export to Southeast Asia Markets
We purchased 50 tons of mixed specification galvanized coils — Z120 and Z200 coating weights, thicknesses ranging 0.4mm to 1.2mm, widths 600mm to 1250mm — for distribution to construction customers in Vietnam and Indonesia. Supplier accommodated the mixed container arrangement at the 10-ton-per-spec MOQ, which most mills decline. JIS G3302 certification was provided alongside ASTM documentation, which our end customers required. Delivery took 28 days for the custom-width items, which was within the quoted 20–30 day window but on the longer end. Packaging was adequate. Pricing was competitive versus spot market. Will continue placing quarterly orders.

Carlos Silva

Brazil

verified purchases

2025-10-06

Good Value Galvanized Coil for Agricultural Silo Panels
Ordered 35 tons of DX51D+Z, Z275, 0.7mm × 1200mm for grain storage silo panel production. Pricing was competitive — about 8% below our previous supplier on a CIF Santos basis. MTC documentation was complete and ASTM A653 compliant. Minor point: two coils in the shipment had slightly uneven edge trim requiring re-slitting on our line, adding about half a day of processing time. We raised this with the supplier and they acknowledged it promptly, offering a credit adjustment. Overall quality was acceptable for our application and we will reorder, but tighter edge quality control would make this a 5-star supplier.

William Taylor

Australia

verified purchases

2025-10-28

Reliable Z600 Heavy Coating Coil for Marine Structures
We required 18 tons of heavy-coating galvanized coil — Z600, 3.0mm thickness, 900mm width — for fabricating cable trays in a coastal marine facility. Finding Z600 coating at this thickness from a single source was difficult until we contacted this supplier. They confirmed stock availability within 24 hours and provided a pre-shipment coating weight test report showing 612 g/m², exceeding our minimum requirement. EN 10204 3.1 certificate included bend test (180°, no coating detachment) and salt spray data. Shipped in 11 business days. Third-party inspection by Bureau Veritas was arranged smoothly. Highly recommend for heavy-duty corrosion protection applications.

Ahmed Al-Hassan

UAE

verified purchases

2025-11-19

Outstanding HDG Coil Supply for Infrastructure Project
Purchased 60 tons of hot dipped galvanized coil — Z350 coating, 2.0mm thickness, 1219mm width — for highway guardrail fabrication in a government infrastructure contract. Material certification covered chemical composition, bend test, and coating mass, all meeting ASTM A653/A653M-20 requirements. The supplier arranged FOB Tianjin shipment with full packing list and SGS pre-shipment inspection within our timeline. Coils were properly eye-to-sky packed with VCI paper and steel banding — arrived in perfect condition at Jebel Ali port. Response time on our RFQ was under 10 hours. This is our first order with them and definitely not the last.

Hans Mueller

Germany

verified purchases

2025-12-01

Premium Galvanized Coil for HVAC Duct Manufacturing
Placed a 25-ton trial order of SGCC grade, Z180 coating, 0.6mm × 1000mm for air conditioning housing components. Requested zero spangle with anti-fingerprint treatment — both executed correctly. Coating weight verified at 183 g/m² per our incoming inspection. Dimensional tolerance held at ±0.3mm on thickness across the full coil width. Compared quotations from four European and Asian suppliers; this supplier offered the most competitive CIF Hamburg pricing with equivalent documentation. MTC format was EN 10204 3.1 compliant, which our QA department accepted without revision. Delivery in 22 days for this custom spec.

James Wilson

United Kingdom

verified purchases

2025-12-23

Superior HDG Coil Quality for Automotive Components
We sourced 30 tons of hot dipped galvanized coil, 0.8mm thickness, 1500mm width, minimized spangle with skin-pass finish for stamping underbody structural parts. Chemical composition and mechanical properties on the MTC were fully compliant with EN 10346:2015 — yield strength measured at 218 MPa, tensile at 315 MPa. No edge wave or camber issues across all coils. The sales team responded to our technical queries within 6 hours and arranged third-party inspection without hesitation. Delivery completed in 14 days. Will continue sourcing from this supplier.

Michael Johnson

United States

verified purchases

2026-01-07

Excellent Galvanized Coil for Roofing Fabrication
Ordered 40 tons of DX51D+Z, Z275 coating, 0.5mm thickness, 1250mm width for our roofing sheet production line. Mill test certificate (EN 10204 Type 3.1) confirmed zinc coating mass at 278 g/m² — right on spec. Surface was chromate-passivated with zero spangle, exactly as requested. Coils arrived in 9 business days, within the quoted window. Salt spray test results we ran in-house matched their 72-hour white rust resistance claim. This is our second order and we've already placed a third. Solid mill-direct supplier.