Products Description

The ASTM A709 50W grade is a high-performance weathering steel designed to deliver excellent strength and corrosion resistance for transportation infrastructure and long-lasting structural applications.
Often referred to as Astm A709 Gr50W Plate or A709 corten steel plate, this alloy belongs to the family of astm a709 weathering steel products that develop a protective, rust-colored patina over time when exposed to open-air conditions.
Unlike standard carbon steel, astm a709 gr50 requires no ongoing painting to maintain its integrity, which significantly reduces upkeep and extends the lifespan of bridges, architectural steelwork, rail structures, and marine facilities.
Chemical Composition
|
Grade |
C |
Si |
Mn |
P |
S |
Nb |
|
A709-50W |
≤0.20 |
≤0.40 |
≤1.50 |
≤0.04 |
≤0.05 |
0.005–0.05 |
Key Features

Structural Reliability
Built for demanding engineering projects, Astm A709 Gr50W Plate offers robust load-bearing capacity with a minimum yield strength of 50 ksi and tensile strength of 70 ksi.
Natural Corrosion Shield
As a type of A709 corten steel plate, it forms an adherent oxide surface that acts as a permanent barrier to atmospheric elements.
Sustainable & Low Upkeep
Eliminates the need for repetitive painting cycles, lowering maintenance expenses and reducing environmental impact.
Application

Bridge & Highway Infrastructure – Long-span bridges, approach spans, cross-beams, and deck systems.
Architectural Applications – Public buildings, steel frameworks, outdoor sculptures, and façade systems.
Rail & Transit Projects – Track support structures, tunnel portals, and protective barriers.
Coastal & Offshore Facilities – Port cranes, dock structures, breakwaters, and sea-crossing bridges.
Industrial & Heavy Equipment – Mining trucks, gantry cranes, and structural frameworks for processing plants.
One-Stop Weathering Steel Solutions for Diverse Project Needs
At Gnee, we provide full-process corten steel solutions including design, fabrication, surface treatment, and global shipping. Whether you're building a facade, a garden structure, or an industrial component, we deliver with speed, quality, and flexibility.
Our service highlights:
Drawing optimization and custom design
Precision fabrication with strict quality control
Various surface finishes: pre-rusted, painted, or anti-corrosion
Export-grade packaging and reliable worldwide logistics
Full technical support before and after sales
One supplier for everything – streamlined and efficient project delivery. Send us an email at corten@gneesteelgroup.com - we'll be happy to help!
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