Corten Steel Coil Manufacturer - High-Quality Weathering Steel Supplier

Baiqu Steel Coil Manufacturing Co., Ltd.

Verified Custom manufacturer 4yrs

Technical Specifications of Corten Steel Coil

Property	Parameter	Description
Product Name	Corten Steel Coil	Weathering resistant steel coil with protective patina
Material Grade	ASTM A588 / A242 / SPA-H / S355J2WP	International grade equivalents for weathering steel
Standard Compliance	ASTM A606, EN 10025-5, JIS G3125	Meets major international weathering steel standards
Carbon (C)	≤0.12%	Low carbon for improved weldability
Chromium (Cr)	0.50-1.25%	Enhances atmospheric corrosion resistance
Copper (Cu)	0.25-0.55%	Key element for protective patina formation
Phosphorus (P)	0.07-0.15%	Improves corrosion resistance and strength
Silicon (Si)	0.25-0.75%	Deoxidizer and strengthener
Manganese (Mn)	0.20-1.25%	Improves hardenability and tensile strength
Tensile Strength	≥485 MPa	Minimum tensile strength per ASTM A588
Yield Strength	≥345 MPa	Minimum yield strength for structural use
Elongation	≥18%	Ductility in 200mm gauge length
Thickness Range	1.5 - 16 mm	Available coil thickness options
Width Range	1000 - 2000 mm	Standard and custom widths available
Coil Weight	5 - 25 tons	Standard coil weight per unit
Surface Finish	Pickled, Oiled, Pre-weathered, Mill finish	Multiple surface treatment options
Application	Architecture, Bridges, Containers, Facades, Sculpture	Typical outdoor and structural applications
Certification	EN 10204 3.1, ISO 9001, Mill Test Certificate	Quality certifications provided
MOQ	5 tons	Minimum order quantity

Corten Steel Coil Manufacturer - High-Quality Weathering Steel Supplier

As a dedicated corten steel coil manufacturer, we supply premium-grade weathering steel coils engineered for long-term atmospheric corrosion resistance without the need for protective coatings. Our corten coils serve critical roles in architectural cladding, bridge construction, shipping containers, and outdoor sculptural applications. With mill-direct production capabilities and strict adherence to international standards, we deliver consistent material quality to contractors, fabricators, and distributors worldwide.

What Is Corten Steel Coil?

Corten steel coil is a hot-rolled weathering steel product characterized by its ability to form a stable, protective rust-like patina when exposed to atmospheric conditions. This self-healing oxide layer eliminates the requirement for painting or galvanizing, significantly reducing lifecycle maintenance costs across structural and decorative applications.

Corten Steel Coil Technical Specifications

Our weathering steel coils are manufactured according to ASTM A588/A588M-19 and EN 10025-5:2004 (S355J0WP / S355J2W). Key mechanical properties include a minimum yield strength of 345 MPa, tensile strength ranging from 485 to 620 MPa, and elongation of 18% minimum. Chemical composition features copper content of 0.25–0.40%, chromium at 0.40–0.65%, and phosphorus at 0.07–0.15%, which collectively promote the formation of the protective patina layer.

Corten steel coil supplier

Parameter	Specification
Grades	ASTM A588 Gr.A/B/C, SPA-H, S355J0WP, 09CuPCrNi-A
Thickness	1.5 mm – 25.0 mm
Width	1000 mm – 2000 mm
Coil Weight	5–28 MT per coil
Surface Finish	Pickled & oiled, dry, or mill finish
Yield Strength	≥345 MPa per ASTM A588

Why Choose Our Corten Steel Coils

Mill-Direct Pricing: Factory-competitive rates with no intermediary markups, supporting cost-effective procurement for large-volume projects.
Certified Quality: Every coil ships with EN 10204 3.1 Mill Test Certificates, verified through independent third-party inspection upon request.
Processing Capability: In-house slitting, cut-to-length, and leveling services available to meet project-specific dimensional requirements.
Global Logistics: Export-standard seaworthy packaging with experience shipping to over 40 countries across North America, Europe, Southeast Asia, and the Middle East.

Frequently Asked Questions

What is the minimum order quantity (MOQ) for corten steel coils?

Our standard MOQ is 5 metric tons per grade and thickness combination. For trial orders or specialty dimensions, we accommodate quantities as low as 2 MT subject to current mill inventory.

Do you provide material test certificates with each shipment?

Yes. Every delivery includes EN 10204 Type 3.1 mill test certificates documenting chemical composition, mechanical properties, and heat number traceability in compliance with ASTM A588 requirements.

What is the typical delivery time for weathering steel coils?

Stock items ship within 7–10 business days. Custom rolling orders from our corten steel coil manufacturing facility typically require 25–35 days depending on grade, dimensions, and current production scheduling.

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Can you supply pre-weathered or custom-processed corten coils?

Absolutely. We offer accelerated pre-patina treatment, precision slitting to widths as narrow as 50 mm, and cut-to-length processing. Custom surface treatments are available to achieve the desired aesthetic for architectural projects.

Corten steel coil China

Get a Competitive Quote for Corten Steel Coils

Ready to source weathering steel coils from a proven corten steel coil manufacturer? Contact our sales team with your required grade, thickness, width, and quantity. We respond to all inquiries within 12 hours with detailed pricing, lead times, and technical documentation tailored to your project specifications.

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

2025-02-22

Acceptable Corten Coil Quality, Communication Improved After Initial Delay
First order with this supplier — 8 tons of ASTM A588 Gr.A corten coil, 5mm thickness, 1200mm width. The material itself tested within specification when we ran our incoming inspection: yield strength at 351 MPa and chemical composition on the MTR matched our requirements. However, the initial shipment notification was delayed by 5 days without proactive communication from the logistics team, which caused scheduling issues at our Toronto facility. When we raised the issue, the sales contact responded quickly and arranged expedited documentation. The coil surface finish (pickled and oiled) was clean and the coil weight per unit was consistent with the order specification. Quality is there — just need more reliable shipment updates going forward.

Wei Chen

Singapore

verified purchases

2025-03-15

Excellent Service and Documentation for Multi-Grade Corten Order
As a distributor, we placed a mixed order totaling 30 tons across three grades — S355J0WP at 2mm, ASTM A588 Gr.B at 4mm, and SPA-H at 6mm — all 1500mm width. Each coil shipment came with individual EN 10204 3.1 certificates with heat number traceability, which our downstream clients in Southeast Asia require for project compliance. The sales team coordinated consolidation into a single FCL shipment and provided all export documentation within 2 days of cargo readiness. Stock items shipped in 8 business days. We've now placed four orders over the past year and the consistency in both quality and service has made this our primary corten steel source for the region.

Carlos Silva

Brazil

verified purchases

2025-04-07

Reliable Corten Coils for Infrastructure, Competitive on Price
We purchased 10 tons of ASTM A588 Gr.C coil, 10mm thickness, 1600mm width for a highway barrier project in São Paulo state. Tensile strength on the mill certificate came in at 498 MPa, within the 485–620 MPa specification range. Cut-to-length processing was available and we used it for 4 tons of the order — flatness tolerance was acceptable though one batch had slight edge bow that required minor straightening on our end. Price was 6% below our previous supplier for comparable grade and thickness. Delivery time was 32 days for custom rolling, which matched the quoted estimate. Overall a dependable supplier for infrastructure-grade weathering steel.

William Taylor

Australia

verified purchases

2025-04-28

Superior Pre-Weathered Corten Coil for Sculpture Installation
Sourced 6 tons of 09CuPCrNi-A corten coil at 2mm thickness, 1000mm width with accelerated pre-patina treatment for a large public sculpture commission in Melbourne. The pre-weathered finish was even and aesthetically consistent across all coils — exactly what the architect specified. Precision slit widths at 200mm and 500mm were accurate to within 0.5mm. Response to our initial inquiry came within 8 hours with full technical documentation and pricing. Delivery took 18 days to Sydney port. This is a niche product and not easy to source with pre-patina treatment — glad to have found a supplier capable of handling it.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-14

Good Quality SPA-H Coils, Minor Lead Time Adjustment Needed
Ordered 12 tons of SPA-H grade corten coil, 8mm thickness, 1800mm width for a structural application in Abu Dhabi. Material quality was solid — yield strength confirmed at 358 MPa and the coil flatness after leveling was acceptable for our fabrication process. Pricing was competitive compared to two other suppliers we approached. The only issue was the delivery estimate shifted from 30 to 37 days due to production scheduling, though the sales team communicated this proactively and we were able to adjust our project timeline. EN 10204 3.1 certificates were complete and accurate. Would order again with earlier confirmation of lead times.

Michael Johnson

United States

verified purchases

2025-06-02

Premium ASTM A588 Coils for Shipping Container Fabrication
Placed a 25-ton order of ASTM A588 Gr.A corten coil, 3mm and 5mm thicknesses, 2000mm width, mill finish. Chemical composition on the MTRs showed phosphorus at 0.11%, right in the specified range, which is critical for our container application. We compared pricing from four domestic service centers and this supplier came in 8–12% lower on mill-direct pricing. Slitting service was also utilized — they slit down to 800mm widths in-house and dimensional tolerance was within ±1mm. Delivery to our Chicago facility took 14 days including ocean freight. No complaints on quality or logistics.

Hans Mueller

Germany

verified purchases

2025-06-24

Outstanding S355J2W Coils with Full EN Documentation
We sourced 22 tons of S355J2W weathering steel coil at 4mm thickness and 1250mm width for an outdoor architectural facade project in Hamburg. The EN 10204 Type 3.1 mill test certificates were included with the shipment and showed mechanical properties fully within EN 10025-5:2004 requirements — yield strength measured at 387 MPa, tensile at 532 MPa. We also requested third-party inspection and the supplier arranged SGS verification without any issues. Lead time for this custom rolling order was 28 days, which was within the 25–35 day estimate given at order placement. Packaging was seaworthy and all coils arrived without moisture damage. Will continue sourcing from this mill.

James Wilson

United Kingdom

verified purchases

2025-07-09

Excellent Corten Coils for Bridge Cladding Project
Ordered 18 tons of ASTM A588 Gr.B corten steel coil, 6mm thickness, 1500mm width, pickled and oiled finish. Mill test certificates confirmed copper at 0.32% and chromium at 0.58%, fully compliant with ASTM A588/A588M-19. Surface condition was consistent across all coils with no edge waviness or camber issues. Material arrived in 9 business days, well within the quoted 10-day window. We've since used this for a pedestrian bridge cladding project in Manchester and the patina development has been uniform and exactly as expected. Third order with this supplier and quality remains consistent.