Weathering Steel Plates for Construction - Mill Direct

Zhonghe Building Materials Co., Ltd.

Verified Custom manufacturer · 3 yrs ·

China

weathering steel plates for construction

Customizable Rock-bottom price

$560 1-49 ton Base price

$535 50-99 ton 4.5% off

$523 ≥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$ 560.00

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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 Weathering Steel Plates for Construction

Property	Parameter	Description
Product Name	Weathering Steel Plates for Construction	High-strength low-alloy steel plates with enhanced atmospheric corrosion resistance
Material Grade	ASTM A588 Gr.A/B/C/K; Corten A; Corten B; S355J2W; Q355NH; SPA-H	International equivalent grades for structural weathering steel applications
Standard Compliance	ASTM A588 / A606; EN 10025-5; JIS G3125; GB/T 4171	Meets major international standards for atmospheric corrosion-resistant structural steel
Chemical Composition – C	≤ 0.19%	Low carbon content ensures good weldability and toughness
Chemical Composition – Mn	0.80% – 1.25%	Manganese improves strength and hardenability
Chemical Composition – Si	0.30% – 0.65%	Silicon contributes to corrosion resistance and deoxidation
Chemical Composition – Cr	0.40% – 0.65%	Chromium is a key element forming the protective patina layer
Chemical Composition – Cu	0.25% – 0.40%	Copper significantly enhances atmospheric corrosion resistance
Chemical Composition – P / S	P ≤ 0.035%; S ≤ 0.030%	Controlled phosphorus and sulfur levels for improved ductility and weld quality
Tensile Strength	485 – 620 MPa (ASTM A588); 470 – 630 MPa (EN 10025-5 S355J2W)	High tensile strength suitable for load-bearing structural construction
Yield Strength	≥ 345 MPa (ASTM A588); ≥ 355 MPa (S355J2W)	Minimum yield strength ensuring structural integrity under design loads
Elongation	≥ 18% (in 200 mm gauge length)	Adequate ductility for forming, bending, and structural fabrication
Thickness Range	3 mm – 150 mm	Wide thickness range covering thin plates to heavy structural plates
Width × Length	Width: 1000 – 4200 mm; Length: 3000 – 18000 mm	Custom cutting available; standard mill plates and coils supplied
Surface Finish	Hot-rolled; Sandblasted (Sa2.5); Natural Rusted Patina	Surface can be supplied as-rolled, pre-weathered, or blast-cleaned per project requirement
Application	Bridges, building facades, retaining walls, highway structures, sculptures, industrial architecture	Ideal for exposed structural elements where maintenance-free corrosion protection is required
Certification	Mill Test Certificate (EN 10204 3.1 / 3.2); CE Marking; ISO 9001:2015	Full traceability documentation and third-party inspection available upon request
Packaging	Bundled with steel strips; wooden pallet or bare bundle; waterproof paper wrapping optional	Packed to prevent transit damage; export seaworthy packaging available
MOQ	5 Metric Tons per grade/size	Mixed grades and sizes accepted to meet minimum order requirement

Weathering Steel Plates for Construction - Mill Direct

Weathering steel plates for construction represent one of the most technically advanced and cost-efficient structural materials available in today's building industry. Also known as atmospheric corrosion-resistant steel, these plates develop a stable, tightly adherent oxide patina when exposed to weather cycles, effectively eliminating the need for protective coatings in most environments. This self-protecting layer regenerates continuously, delivering decades of reliable service life with minimal maintenance intervention. Structural engineers, architects, and project managers across bridge construction, building facades, retaining walls, and heavy civil infrastructure consistently specify weathering steel plates for their long-term performance advantages. With a tensile strength ranging from 485 MPa to 620 MPa depending on grade, and a yield strength minimum of 345 MPa per ASTM A588/A588M standards, these plates deliver measurable structural integrity while reducing lifecycle costs by an estimated 30–50% compared to painted carbon steel alternatives.

What Are Weathering Steel Plates for Construction?

Weathering steel plates for construction are low-alloy, high-strength steel plates specifically engineered with copper, chromium, nickel, and phosphorus additions — typically 0.25–0.55% Cu and 0.40–0.65% Cr — that promote the formation of a dense, protective rust layer. Compliant with ASTM A588, EN 10025-5 (S355J0WP/S355J2W), and GB/T 4171 standards, they serve critical roles in exposed structural applications where long-term durability is paramount.

weathering steel plates for construction supplier

Weathering Steel Plates for Construction Technical Specifications

Our mill-direct weathering steel plates are available in thicknesses from 3 mm to 150 mm, widths up to 4,000 mm, and lengths up to 18,000 mm. Key mechanical properties include a minimum yield strength of 345 MPa, tensile strength of 485–620 MPa, and Charpy impact energy of 27 J at −20°C. Density is 7.85 g/cm³ at 20°C. Corrosion resistance index (I) exceeds 6.0 per ASTM G101, confirming superior atmospheric corrosion performance. Plate surfaces are available in hot-rolled, normalized, or TMCP condition to meet specific project engineering requirements.

Grade	Standard	Yield Strength (MPa)	Tensile Strength (MPa)	Thickness Range (mm)
A588 Grade A	ASTM A588	≥ 345	485–620	3–100
S355J2W	EN 10025-5	≥ 355	470–630	3–150
S355J0WP	EN 10025-5	≥ 355	470–630	3–40
Q355NH	GB/T 4171	≥ 355	490–630	3–100

Get a Competitive Quote for Weathering Steel Plates for Construction

Procuring weathering steel plates for construction directly from our mill ensures you receive certified material at mill-direct rates, backed by full third-party inspection documentation, MTRs, and on-time delivery guarantees. Whether your project demands standard stock sizes or custom-cut plates, our team provides tailored solutions with short lead times.

weathering steel plates for construction manufacturer

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weathering steel plates for construction China factory

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Khalid A.

UAE

2025-02-01

Initial documentation gap — resolved satisfactorily before shipment

Ordered 12 tonnes of A588 Grade A plates at 16 mm for an industrial structure in Abu Dhabi. When the pre-shipment documentation pack arrived, the third-party inspection certificate referenced the wrong heat number — a clerical error. We flagged this immediately and, to their credit, the team corrected and reissued the full documentation set within 36 hours, prior to shipment departure. Material quality itself was fine — tensile and yield values on the MTR were within ASTM A588 limits. The issue caused a brief delay in our client's approval process but was fully resolved. Supplier responsiveness in fixing the error was good.

Anita K.

United Kingdom

2025-02-23

Competitive pricing on Q355NH, delivery slightly longer than quoted

Procured 30 tonnes of Q355NH plates at 20 mm and 35 mm thicknesses for a commercial building facade project in Leeds. Material quality was good — GB/T 4171 certification provided, yield strength at 362 MPa confirmed on MTR. Our only note is that delivery took 26 days versus the 20-day estimate quoted at order stage. The supplier proactively communicated the delay at day 18 and updated the ETA, which we appreciated. For a non-time-critical order the pricing advantage over UK stockholders justified the lead time. Technical consultation on grade selection for urban atmospheric exposure was genuinely helpful.

David H.

United States

2025-03-17

Good value on S355J2W, minor width tolerance query resolved quickly

Ordered 18 tonnes of S355J2W at 30 mm thickness for a pedestrian bridge project in Colorado. Overall quality was solid — EN 10025-5 compliance confirmed, Charpy impact at −20°C met spec. We did raise a query about width tolerance on two plates that measured marginally outside the stated range. The technical team responded within 12 hours, provided measurement documentation, and confirmed the plates were within EN 10029 Class C tolerance — which was acceptable for our application. Pricing for this grade was competitive. Would order again, and the after-sales response built confidence in the supplier.

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Zhonghe Building Materials Co., Ltd.

3 yrs on Sinoali.com

Located in China

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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.