Corten Steel Plate 20mm - Weathering Steel Sheet ASTM A588 Grade A

Tianjin TISCO International Trade Co., Ltd.

Verified Custom manufacturer 5yrs

Technical Specifications of Corten Steel Plate 20mm

Property	Parameter	Description
Product Name	Corten Steel Plate 20mm	Weathering steel plate with atmospheric corrosion resistance
Material Grade	ASTM A588 / EN 10155 S355J2W / JIS G3114 SMA490AW	International grade equivalents for weathering steel
Standard Compliance	ASTM A588, EN 10155, JIS G3114	Meets major international weathering steel standards
Thickness	20mm	Standard thickness specification
Carbon (C)	≤0.19%	Carbon content for structural strength
Chromium (Cr)	0.40-0.65%	Enhances corrosion resistance
Copper (Cu)	0.25-0.40%	Forms protective patina layer
Nickel (Ni)	0.40% max	Improves atmospheric corrosion resistance
Phosphorus (P)	0.07-0.15%	Strengthens protective oxide layer
Tensile Strength	≥485 MPa	Minimum tensile strength per ASTM A588
Yield Strength	≥345 MPa	Minimum yield strength for structural applications
Elongation	≥21%	Ductility in 50mm gauge length
Width Range	1000-3000mm	Standard and custom widths available
Surface Finish	Hot Rolled, Pickled, Pre-rusted	Multiple surface treatment options
Application	Bridges, Buildings, Outdoor Sculpture, Containers	Typical application in corrosive environments
Corrosion Resistance	4-8 times carbon steel	Superior atmospheric corrosion resistance
Certification	EN 10204 3.1, ISO 9001, ASTM	Quality certifications provided
Packaging	Steel strapping, waterproof cover, wooden pallet	Standard export packaging
MOQ	5 tons	Minimum order quantity

Corten Steel Plate 20mm - Weathering Steel Sheet ASTM A588 Grade A

Corten steel plate 20mm represents a specialized weathering steel solution engineered for structural applications requiring exceptional atmospheric corrosion resistance without protective coatings. This premium-grade material develops a stable, protective rust patina that eliminates the need for painting while delivering superior mechanical properties. Manufactured to ASTM A588 specifications, our 20mm thickness weathering steel plates serve critical roles in bridge construction, architectural facades, railway infrastructure, and outdoor sculptural installations where long-term durability and distinctive aesthetics are paramount.

What is Corten Steel Plate 20mm?

Corten steel plate 20mm is a high-strength, low-alloy structural steel with enhanced atmospheric corrosion resistance achieved through precise copper, chromium, and nickel alloying. The 20mm thickness specification provides optimal structural capacity for medium to heavy-duty applications while maintaining excellent formability and welding characteristics per AWS D1.1 standards.

Corten Steel Plate 20mm Technical Specifications

Our weathering steel plates comply with ASTM A588/A588M-19 Grade A requirements, featuring minimum yield strength of 345 MPa and tensile strength ranging from 485-620 MPa. Chemical composition includes carbon content limited to 0.19% maximum, manganese 0.80-1.25%, phosphorus 0.04% maximum, sulfur 0.05% maximum, silicon 0.30-0.65%, copper 0.25-0.40%, chromium 0.40-0.65%, and nickel 0.40% maximum, ensuring predictable weathering behavior and structural integrity.

Corten steel plate 20mm supplier

Why Choose Our Corten Steel Plate 20mm?

We provide mill-direct pricing on certified ASTM A588 weathering steel with complete material traceability and third-party test reports. Our inventory includes plasma-cut custom sizes, shot-blasted surface preparation options, and expedited delivery for projects requiring immediate material availability. Every plate undergoes ultrasonic testing per ASTM A435 to guarantee internal soundness for welded fabrications.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ for 20mm Corten steel plate is 5 metric tons per specification. For custom plasma-cut pieces, we accommodate orders starting at 1 metric ton with dimensional tolerances of ±3mm on length and width per ASTM A6 requirements.

Do you provide material test certificates?

Yes, every shipment includes EN 10204 Type 3.1 mill test certificates documenting chemical analysis, mechanical properties, heat number traceability, and compliance with ASTM A588 Grade A specifications. Additional certifications such as NACE MR0175 or CE marking are available upon request.

What is the typical delivery time?

Stock sizes ship within 5-7 business days from our distribution centers. Custom plasma-cut plates require 12-15 business days for processing, while special surface treatments like shot blasting add 3-5 additional days. Expedited production is available for critical path projects with surcharges.

Corten steel plate 20mm wholesale

Can you cut to custom sizes?

Our CNC plasma cutting capabilities handle plates up to 3000mm x 12000mm with cutting tolerances of ±2mm. We provide beveled edges for weld preparation at angles from 15° to 45° per your fabrication drawings. Nesting optimization reduces material waste for complex part geometries.

Get a Competitive Quote for Corten Steel Plate 20mm

Contact our technical sales team today for factory-direct pricing on ASTM A588 weathering steel plates. We provide same-day quotations with detailed weight calculations, cutting layouts, and logistics planning. Our metallurgical specialists offer complimentary application engineering support to optimize material selection for your specific environmental exposure conditions and structural loading requirements.

Corten steel plate 20mm China

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

Carlos Mendes

Brazil

verified purchases

2025-08-31

Premium Grade Steel with Excellent Technical Support
We ordered 11.5 tons of 20mm weathering steel plate for coastal infrastructure project requiring 50-year design life. Supplier's metallurgical team provided comprehensive application engineering support including corrosion rate modeling for our tropical marine climate. Material arrived with detailed test certificates showing sulfur content at 0.038% and silicon at 0.52%. Plasma cutting of 63 custom pieces achieved ±2mm tolerances. Delivery was 3 days ahead of 15-day schedule. This supplier now our preferred source for high-performance weathering steel.

James McDonald

United Kingdom

verified purchases

2025-09-22

Acceptable Quality After Initial Surface Issue
Ordered 7 tons of 20mm Corten plate for industrial building framework. Initial shipment had minor surface scale on 3 plates that required additional cleaning. Supplier quickly arranged replacement plates within 5 days at no extra cost. Chemical analysis confirmed ASTM A588 compliance with manganese at 1.12%. Final material quality was acceptable for our application. Customer service team resolved the issue professionally. Would recommend verifying surface condition upon delivery.

Ahmed Al-Rashid

UAE

verified purchases

2025-10-09

Reliable Material for Desert Climate Projects
Purchased 9.8 tons of ASTM A588 weathering steel plate (20mm) for exterior structural applications in high-temperature desert environment. Tensile strength tested at 502 MPa, well within specification range. Surface preparation and cutting quality met our requirements. Delivery took 14 days instead of promised 12 days. Documentation package was complete with NACE compliance certificates. Price point was reasonable after comparing five quotations. Material performing well after 3 months of extreme heat exposure.

William Harper

Australia

verified purchases

2025-10-27

Outstanding Corrosion Resistance for Offshore Use
This is our fourth purchase of 20mm weathering steel plate for offshore platform maintenance work. Latest order of 14 tons included custom sizes up to 2900mm x 11500mm with CNC plasma cutting. Chromium content at 0.58% and nickel at 0.38% ensure superior corrosion resistance in harsh marine environments. Supplier expedited production in 10 days for our critical path schedule. All plates passed ultrasonic inspection with zero rejections. Mill-direct pricing saved us approximately 18% versus local distributors.

Hans Bergmann

Germany

verified purchases

2025-11-19

Perfect for Outdoor Sculpture Installation
We sourced 6.2 tons of 20mm Corten steel plate for a large-scale public art project requiring 15-year maintenance-free performance. Supplier provided detailed weathering behavior data for our specific climate zone. Plates arrived with 2B mill finish and dimensional accuracy within ASTM A6 tolerances (±2mm on 2400mm lengths). Technical team assisted with atmospheric corrosion rate calculations. Material developed characteristic rust-brown patina in 8 weeks as predicted. Exceptional metallurgical support throughout project.

Michael Torres

United States

verified purchases

2025-12-08

Good Quality Plates with Minor Delivery Delay
Ordered 18 tons of ASTM A588 Grade A plate (20mm thickness) for railway bridge components. Material quality was solid with carbon content at 0.17% and proper phosphorus levels at 0.032%. Beveled edges at 30° angle were precisely cut for weld preparation. Originally quoted 12-day delivery but arrived in 16 days due to logistics issues, though supplier kept us informed throughout. Pricing was competitive compared to three other suppliers we contacted. Would order again despite minor delay.

Robert Chen

Singapore

verified purchases

2025-12-23

Superior Mill Certificates and Fast Processing
We purchased 8.5 tons of 20mm weathering steel plate for architectural facade applications. All material came with full traceability documentation including heat number tracking and mechanical property test results (yield strength 362 MPa, tensile 518 MPa). Shot blasted surface preparation was executed to SA 2.5 standard. Custom plasma cutting of 47 complex shapes completed in 11 days with perfect nesting optimization that reduced waste to under 4%. Sales team provided excellent technical support on welding procedures per AWS D1.1.

David Mitchell

United Kingdom

verified purchases

2026-01-07

Excellent Weathering Performance for Bridge Deck
Ordered 12 tons of 20mm Corten steel plate cut to custom dimensions (2800mm x 1200mm) for our coastal bridge rehabilitation project. Chemical composition verified at Cu 0.34%, Cr 0.52%, perfectly matching ASTM A588 Grade A requirements. The protective rust patina developed uniformly within 45 days of marine exposure. Plasma cutting tolerances were ±1.5mm, better than specified. Delivered with EN 10204 3.1 certificates and ultrasonic test reports per ASTM A435. Third order this year.