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

Baiqu Steel Coil Manufacturing Co., Ltd.

Verified Custom manufacturer 4yrs

Technical Specifications of Galvanized Steel Coil

Property	Parameter	Description
Product Name	Galvanized Steel Coil	Zinc-coated carbon steel coil for corrosion protection
Base Material	Q235B / SGCC / DX51D / CS Type B	Low-carbon steel substrate grades
Standard Compliance	ASTM A653, EN 10346, JIS G3302, GB/T 2518	Meets major international standards
Galvanizing Process	Hot-Dip Galvanized (GI)	Continuous hot-dip zinc coating line
Zinc Coating Weight	Z60 - Z275 (60-275 g/m²)	Coating weight per side per ASTM A653
Carbon (C)	≤0.12%	Low carbon for formability and weldability
Manganese (Mn)	≤0.60%	Improves strength of base metal
Phosphorus (P)	≤0.045%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for improved weldability
Tensile Strength	270 - 500 MPa	Varies by grade (SGCC/DX51D/DX52D)
Yield Strength	140 - 350 MPa	Minimum yield strength per grade
Elongation	≥18%	Ductility in 80mm gauge length
Thickness Range	0.12 - 4.0 mm	Available thickness options
Width Range	600 - 1500 mm	Standard and custom widths available
Coil Weight	3 - 10 tons	Standard coil weight range
Spangle Type	Regular / Minimized / Zero Spangle	Surface crystallization pattern options
Surface Treatment	Chromated, Oiled, Passivated, Dry	Post-coating surface protection options
Application	Roofing, HVAC, Automotive, Appliances, Construction	Typical application industries
Certification	EN 10204 3.1, ISO 9001, SGS	Quality certifications provided
MOQ	5 tons	Minimum order quantity

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

Galvanized steel coil is a carbon steel substrate coated with a protective zinc layer through hot-dip or electro-galvanizing processes, delivering outstanding anti-corrosion properties and extended service life. This versatile material serves critical roles in construction, automotive manufacturing, appliance production, and general industrial fabrication. As a mill-direct supplier, we provide premium grade galvanized steel coil with zinc coating weights ranging from 60 g/m² to 600 g/m², manufactured according to ASTM A653/A653M and EN 10346:2015 standards to meet the rigorous demands of global B2B buyers.

What Is Galvanized Steel Coil?

Galvanized steel coil refers to cold-rolled or hot-rolled steel strip that has been continuously passed through a molten zinc bath at approximately 460°C, forming a metallurgically bonded zinc-iron alloy coating. This sacrificial zinc layer acts as both a physical barrier and cathodic protector, preventing the base steel from oxidation and corrosive degradation even when the surface is scratched or cut.

Galvanized Steel Coil Technical Specifications

Our galvanized steel coil is produced in strict compliance with ASTM A653/A653M-20 and JIS G3302 requirements. Below are the standard parameters available:

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Parameter	Range
Base Steel Grade	CS Type A/B/C, SS Grade 33–80, SGCC, DX51D+Z
Thickness	0.12 mm – 4.0 mm
Width	600 mm – 1500 mm
Zinc Coating	Z60 – Z600 (60–600 g/m²)
Spangle	Regular, minimized, or zero spangle
Surface Treatment	Chromate-passivated, oiled, or chemical-passivated
Coil Weight	3 MT – 25 MT per coil
Yield Strength	205 MPa – 550 MPa (grade-dependent)

Key Advantages of Our Galvanized Steel Coil

Superior resistance to corrosive environments — zinc coating provides 20–50 years of protection depending on coating thickness and atmospheric conditions
Exceptional formability — readily suitable for roll forming, stamping, bending, and deep drawing operations
Optimal weld performance — compatible with MIG, TIG, and resistance spot welding when proper parameters are applied
Cost-effective lifecycle — eliminates the need for post-fabrication painting or coating in many applications
Consistent dimensional tolerance — thickness tolerance controlled within ±0.02 mm per ASTM A924/A924M

Applications

Galvanized steel coil finds extensive application across diverse industrial sectors. In construction, it is commonly employed for roofing panels, wall cladding, structural purlins, and HVAC ductwork. The automotive sector utilizes this material for body panels, chassis components, and fuel tanks. Appliance manufacturers rely on galvanized coil for washing machine drums, refrigerator shells, and air conditioning housings. Additionally, it is the preferred choice for agricultural equipment, highway guardrails, and electrical enclosures.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 25 metric tons per specification. For trial orders or special grades, we accept quantities as low as 10 MT subject to production scheduling.

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Do you provide material test certificates?

Yes. Every shipment includes mill test certificates (MTC) per EN 10204 Type 3.1, documenting chemical composition, mechanical properties, and zinc coating weight test results.

What is the typical delivery time?

Stock items ship within 7–10 business days. Custom-produced galvanized steel coil with specific coating weights or non-standard widths typically requires 25–35 days from order confirmation.

Can you cut to custom sizes?

Absolutely. We offer slitting to narrow strip widths (as small as 20 mm) and cut-to-length sheet processing with precision tolerances of ±1 mm, all performed on automated production lines.

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Get a Competitive Quote for Galvanized Steel Coil

Ready to source factory-competitive pricing on galvanized steel coil for your next project? Contact our sales team today with your required specifications — including grade, thickness, zinc coating weight, and annual volume — and receive a detailed quotation within 24 hours. We support FOB, CFR, and CIF delivery terms to major ports worldwide.

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

2025-01-29

Acceptable Quality — Coating Weight Issue on One Coil Resolved
Ordered 28 tons of galvanized coil, 0.6mm thickness, Z180 coating, width 1100mm for electrical enclosure fabrication. Overall, 10 of the 11 coils met specification without issue — zinc coating weight confirmed at 183–189 g/m² on MTC. However, one coil showed visible thin coating patches in a 400mm section, which our QC team caught during incoming inspection. We raised a claim with supporting photos. The supplier's response time was about 3 business days, and they issued a credit note for the affected coil weight within the week, which was fair. Delivery was 11 days, within the quoted window. Quality control on the production line could be tighter, but the after-sales handling was professional. Will consider reordering if this issue doesn't recur.

Wei Chen

Singapore

verified purchases

2025-02-26

Decent Galvanized Coil for Re-export to Southeast Asia Markets
We sourced 35 tons of galvanized steel coil across multiple specifications — 0.3mm to 1.0mm thickness, Z60 to Z120 coating, widths 750mm and 1000mm — for distribution to construction clients in Vietnam and Indonesia. Product quality met ASTM A653 requirements as stated, and the regular spangle finish was acceptable for our downstream customers. Packaging with moisture-proof paper and steel strapping was adequate for sea freight. Lead time for the mixed specification order was 32 days, which is within the quoted range but on the longer end. Pricing was competitive after comparing three other mills. Recommend for buyers who can plan procurement 5–6 weeks in advance.

William Taylor

Australia

verified purchases

2025-03-20

Good Value Galvanized Coil with Minor Documentation Delay
Purchased 25 tons of galvanized steel coil, 1.6mm thickness, Z200 coating, width 900mm for agricultural equipment frames. Material quality was solid — yield strength measured at 320 MPa in our lab, consistent with the MTC values, and the zinc coating showed good adhesion in our bend test. Price was approximately 8% lower than our previous Australian distributor for equivalent specification. One minor issue: the EN 10204 3.1 certificates arrived two days after the shipment documents, which caused a brief delay in our goods receipt process. Supplier resolved it promptly when we flagged it. Would order again for the right price point.

Carlos Silva

Brazil

verified purchases

2025-04-12

Reliable Galvanized Coil Supply for Appliance Manufacturing
We have been sourcing galvanized coil from this supplier for the past 14 months across five orders totaling over 200 tons. Our typical specification is 0.5mm–0.7mm thickness, minimized spangle, Z80 coating, width 1200mm, for washing machine drum and refrigerator shell stamping. Quality has been consistent across all shipments — MTC data shows coating weight variance within ±5 g/m² across coils in the same batch. The slitting service to 800mm custom width is accurate to within ±0.8mm, which saves us significant in-house processing time. Pricing remains competitive versus local distributors even after freight to Santos port on CIF terms. Long-term partnership material.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-04

Premium Galvanized Coil for Structural Purlins in Coastal Environment
Ordered 50 tons of galvanized steel coil, 2.0mm thickness, Z275 coating, width 600mm, for structural purlin fabrication on a coastal industrial facility. Given the marine atmosphere at our project site, we specifically required Z275 coating weight — the supplier confirmed zinc coating at 281 g/m² on the MTC, exceeding our specification. CIF delivery to Jebel Ali port was arranged smoothly, and all 12 coils arrived without packaging damage. Our welding team confirmed good resistance spot weld quality using the parameters recommended by the supplier's technical team. This is our second order and we are already planning a third for Q4.

Hans Mueller

Germany

verified purchases

2025-05-26

Excellent GI Coil for Automotive Stamping Components
Placed a 60-ton order of SS Grade 40 galvanized coil, 1.2mm thickness, 1500mm width, Z60 coating for stamped automotive bracket components. We compared technical datasheets from four suppliers before selecting this mill. Yield strength test results from the MTC averaged 295 MPa — consistent with our press tooling requirements. Deep drawing trials showed no coating delamination or cracking at bend radii down to 1.5T. The oiled surface treatment prevented any friction marks during coil transit. Production scheduling was communicated clearly, and the 28-day lead time for this custom specification was met exactly. Very professional operation.

James Wilson

United Kingdom

verified purchases

2025-06-17

Superior Quality GI Coil for HVAC Ductwork
We sourced 30 tons of galvanized steel coil in 0.8mm and 1.0mm thicknesses, width 1000mm, Z100 coating for our HVAC ductwork fabrication contracts. EN 10204 Type 3.1 certificates were included with every coil, showing chemical composition and mechanical properties all within EN 10346:2015 limits. The regular spangle surface was consistent across the entire batch — no coating voids or bare spots detected during our incoming QC inspection. Plasma cutting and TIG welding performance was excellent. Lead time was 8 days from order confirmation for stock items. Will continue ordering for upcoming commercial building projects.

Michael Johnson

United States

verified purchases

2025-07-02

Outstanding Galvanized Coil for Roofing Panel Production
Ordered 40 tons of DX51D+Z galvanized steel coil, 0.45mm thickness, 1250mm width, Z120 coating for our roofing panel roll-forming line. Mill test certificates confirmed zinc coating weight at 128 g/m², fully compliant with ASTM A653. Surface finish was zero spangle with chromate passivation — absolutely no white rust on any coil after 3 weeks in our humid warehouse. Delivered in 9 business days, right on schedule. We've now placed our 4th consecutive order with this supplier. Dimensional tolerance held within ±0.015mm across all coils, which keeps our roll-forming tooling running without adjustment.