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

Tianjin TISCO International Trade Co., Ltd.

Verified Custom manufacturer · 5 yrs ·

China

Customizable Rock-bottom price

$680 1-49 ton Base price

$650 50-99 ton 4.4% off

$635 ≥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$ 680.00

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 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

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Carlos Mendes

Brazil

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

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

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.