Galvanized Steel Suppliers for Construction | Mill Direct

Zhonghe Building Materials Co., Ltd.

Verified Custom manufacturer · 3 yrs ·

China

Galvanized Steel Suppliers (Construction)

Customizable Rock-bottom price

$572 1-49 ton Base price

$547 50-99 ton 4.4% off

$534 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 572.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Galvanized Steel Suppliers (Construction)

Property	Parameter	Description
Product Name	Galvanized Steel for Construction	Hot-dip or electro-galvanized steel products used in structural and building applications
Material Grade	DX51D / S250GD / S350GD / SGCC / G550	International equivalents: ASTM A653 CS/SS, EN 10346, JIS G3302, AS 1397
Standard Compliance	ASTM A653/A653M, EN 10346, JIS G3302, GB/T 2518	Meets international hot-dip galvanized steel sheet and coil standards for structural use
Chemical Composition	C ≤0.12%, Mn ≤0.60%, P ≤0.10%, S ≤0.045%, Si ≤0.50%	Base metal composition per EN 10346 / ASTM A653; zinc coating layer: Zn ≥99.5%
Tensile Strength	270–550 MPa	Varies by grade: DX51D ≥270 MPa; S350GD ≥420 MPa; G550 ≥550 MPa (per EN 10346 / AS 1397)
Yield Strength	140–550 MPa	S250GD ≥250 MPa; S350GD ≥350 MPa; G550 ≥550 MPa; suitable for load-bearing construction
Elongation	≥2%–22%	DX51D A80 ≥22%; high-strength grades (G550) ≥2%; per respective testing standards
Zinc Coating Weight	Z60–Z600 (g/m²); ZF60–ZF180 (galvannealed)	Coating designation per EN 10346 / ASTM A653; Z275 (275 g/m²) most common for construction
Thickness Range	0.12–6.00 mm	Standard construction grades: 0.3–3.0 mm (sheet/coil); structural sections up to 6.0 mm
Width Range	600–1,500 mm	Coil and sheet widths; custom slit widths available upon request
Length / Coil Weight	Sheets: 1,000–6,000 mm; Coils: 3–15 MT	Cut-to-length sheets or full coils; inner diameter 508/610 mm standard
Surface Finish	Regular Spangle, Minimized Spangle, Zero Spangle, Skin-passed	Options include chromate passivation, oiled or dry surface treatment for corrosion protection
Application	Roofing, wall cladding, purlins, framing, decking, HVAC ducts, fencing	Widely used in residential, commercial, and industrial construction for corrosion-resistant structures
Certification	ISO 9001:2015, CE Marking, Mill Test Certificate (EN 10204 3.1/3.2)	Third-party inspection available; SGS, BV, TÜV reports upon request
Packaging	Coils: steel-strapped with waterproof wrapping; Sheets: bundled with wooden pallet	Export seaworthy packaging; moisture-proof paper interleaving available for sheet bundles
MOQ	25 MT per order (coil); 5 MT per grade/size (sheet)	Mixed container orders accepted; spot stock available for standard grades (Z275, DX51D)

Galvanized Steel Suppliers for Construction | Mill Direct

Partnering with reliable galvanized steel suppliers for construction projects is one of the most critical procurement decisions any contractor, developer, or structural engineer will make. Galvanized steel delivers the structural integrity and long-term corrosion protection that modern construction demands — from residential framing and roofing systems to large-scale commercial and infrastructure developments. As mill-direct galvanized steel suppliers, we eliminate intermediary markups and provide consistent, certified material that meets international standards including ASTM A653, EN 10346, and JIS G3302. Our production capacity exceeds 500,000 metric tons annually, ensuring uninterrupted supply for projects of any scale. Whether you require hot-dip galvanized sheets, galvanized structural tubing, or custom-slit coils, our team delivers precision-cut material with zinc coating weights ranging from Z60 to Z600 (g/m²), backed by full mill test reports and third-party inspection options. Choosing the right supplier means choosing quality, traceability, and on-time delivery — all of which define our service commitment to the global construction industry.

What is Galvanized Steel for Construction?

Galvanized steel for construction refers to carbon steel substrate coated with a protective zinc layer through either hot-dip or electrogalvanizing processes, specifically engineered to resist corrosion in structural and architectural applications. This material serves critical roles in roofing, wall cladding, structural framing, purlins, floor decking, and reinforcement systems. Its combination of mechanical strength and anti-corrosion durability makes it the preferred choice across residential, commercial, and civil engineering construction sectors worldwide.

Galvanized Steel Suppliers Construction Manufacturer

Galvanized Steel Suppliers (Construction) Manufacturing Process

Our hot-dip galvanizing process begins with cold-rolled steel coils that undergo alkaline degreasing, hydrochloric acid pickling, and flux treatment to ensure surface purity. Cleaned substrates are then immersed in a molten zinc bath maintained at approximately 450°C, forming a metallurgically bonded zinc-iron alloy coating. Inline skin-pass rolling and tension leveling follow to achieve flatness tolerances within ±0.05 mm, while chemical passivation or oiling is applied to enhance storage stability. Each coil undergoes continuous thickness gauging and coating weight verification before dispatch.

Galvanized Steel Suppliers Construction Wholesale

Galvanized Steel Suppliers (Construction) Technical Specifications

Our construction-grade galvanized steel is available in thicknesses from 0.12 mm to 6.0 mm and coil widths from 600 mm to 1,600 mm. Zinc coating weights are offered from Z60 to Z600 g/m² per ASTM A653 or equivalent EN 10346 designations. Yield strength ranges from 140 MPa (CS Type B) to 550 MPa (Grade 80 HSLA), with tensile strength reaching a minimum of 310 MPa for structural grades. Surface finishes include regular spangle, minimized spangle, and zero spangle options. Base steel grades include DX51D, DX52D, S280GD, and S350GD, with custom mechanical property profiles available upon request for specialized construction applications.

Get a Competitive Quote for Galvanized Steel Suppliers for Construction

Ready to source premium-grade galvanized steel at mill-direct rates? Our dedicated team provides fast, accurate quotations tailored to your construction project specifications, volume requirements, and delivery schedules. Submit your inquiry today and receive a detailed proposal within 24 hours.

Galvanized Steel Suppliers Construction China

24/7 customer support available
Free samples for quality evaluation
Competitive pricing for bulk orders
Professional technical consultation

Contact us today to get your free quote within 24 hours!

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Kevin M.

United States

2025-02-01

Initial Coating Inconsistency Flagged — Issue Resolved Satisfactorily

On our first order of 70 MT of DX51D, 0.7 mm, Z220 coating for metal roofing panels, our QC team found coating weight on 4 coils measured at Z195–Z205 g/m² rather than the specified Z220 minimum per ASTM A653. We raised the nonconformance immediately. The supplier's technical team responded within 12 hours, reviewed our test reports, acknowledged the variance, and arranged a partial replacement shipment within 2 weeks at no additional cost. Subsequent coils were fully in spec. Appreciated the professional resolution. Will give a second order a chance.

Robert A.

UAE

2025-02-22

Competitive Pricing for High-Coating-Weight Material in Gulf Climate

Sourced 110 MT of hot-dip galvanized sheets, Z600 coating weight, 3.0 mm thickness in S280GD for exposed structural applications in Abu Dhabi — the Gulf environment demands maximum zinc protection. Price per ton was notably better than regional distributors for this heavy coating specification. ASTM A653 MTRs provided, third-party inspection option was offered. Shipping to Jebel Ali took 32 days, slightly longer than quoted 28 days. Product quality met our specification fully. Would rate 5 stars if logistics timelines were tighter.

Fiona H.

United Kingdom

2025-03-16

Good Value on Purlins Material — Minor Documentation Delay

Procured 95 MT of S350GD galvanized coils, 2.5 mm, Z350 coating for cold-formed purlin production on a warehouse project. Pricing was competitive versus UK stockholders, and EN 10346 compliance documentation was thorough. One coil bundle arrived with a slightly damaged outer wrap — no coil damage, just packaging. The team issued a replacement wrap claim quickly. Delivery was 3 days late versus original ETA. Overall solid value and product quality; the service recovery was handled professionally. Would order again.

Know your supplier

Zhonghe Building Materials Co., Ltd.

3 yrs on Sinoali.com

Located in China

Company information More goods

FAQ

Q: What is the zinc coating weight of your galvanized steel?

A: Common zinc coating includes Z60, Z80, Z100, Z120, Z180, Z275, and we can also provide custom coating as required.

Q: What types of galvanized steel do you supply for construction?

Q: What is the difference between GI and PPGI?

Q: Do you offer customized sizes and lengths?

Q: How do you package galvanized steel to prevent rust during shipment?

Q: Can you provide mill test certificates (MTC) for galvanized steel?

Product display

Zhonghe Building Materials Co., Ltd. is a professional industrial manufacturer and supplier focusing on high-quality building materials. We specialize in a full range of steel building materials, covering reinforcing steel bars, galvanized steel products, corrugated steel sheets, structural steel pipes and other related metal construction materials.

Equipped with advanced production lines and precision testing equipment, the company implements strict full-process quality control and holds authoritative industry qualification certificates. We maintain sufficient spot inventory, adopt standardized export packaging, and ensure stable delivery cycles to meet global customer demands.

Our products are widely applied in construction engineering, machinery manufacturing, shipbuilding, energy and infrastructure projects. Adhering to the principle of quality first and customer-oriented service, we are committed to providing reliable building material solutions and long-term stable cooperation for global clients.