JIS G3114 SMA400BW Weathering Steel Plate From China

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JIS G3114 SMA400BW Weathering Steel

 

 

 

 

 

It belongs to the category of low-alloy, high-strength steels designed to resist atmospheric corrosion. Also referred to as Corten steel, SMA400BW develops a stable oxide layer or patina when exposed to outdoor conditions, which protects the steel from further corrosion. This characteristic reduces maintenance costs and eliminates the need for protective coatings, making it ideal for large-scale industrial structures, bridges, and outdoor architectural projects.

 

SMA400BW is specified under Japanese Industrial Standard JIS G3114, with a minimum yield strength of 400 MPa and a balanced combination of strength, toughness, and weldability. The "BW" designation indicates improved corrosion resistance for use in environments where moderate weathering occurs.

 

 

 

 

Why Engineers Prefer SMA400BW

 

Low Maintenance Costs: The naturally forming patina reduces the need for repainting or coating.

Balanced Strength and Toughness: Provides sufficient load-bearing capacity for medium-duty applications.

Fabrication Versatility: Compatible with standard welding and machining practices.

Sustainability: Less need for coatings contributes to environmentally friendly construction.

Long Service Life: Properly designed structures can last several decades even in moderately corrosive environments.

 

 

 

Chemical Composition

Typical chemical composition of SMA400BW (% by weight):

Element	C	Si	Mn	P	S	Cu	Cr	Ni
Range	≤0.12	0.25–0.55	1.20–1.60	≤0.025	≤0.025	0.25–0.55	≤0.30	≤0.30

 

 

 

 

 

 

 

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