JIS G3114 SMA400CW Corten Steel Rust Proof

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JIS G3114 SMA400CW Corten Steel

 

 

 

 

 

JIS G3114 SMA400CW Corten Steel contains alloying elements such as copper, chromium, and nickel, which form a stable rust-like oxide layer on the steel's surface when exposed to the atmosphere. This patina acts as a protective barrier, slowing further corrosion without the need for painting or frequent maintenance.

 

 

 

 

Chemical Composition (% by mass)

 

Element	C (max)	Si	Mn	P	S	Cu	Ni	Cr	Mo	V
Value	0.12	0.25–0.75	0.40–1.50	0.035 max	0.035 max	0.20–0.50	0.20 max	0.30–0.50	-	0.02–0.10

 

 

 

 

Typical Mechanical Properties:

 

Thickness (mm)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
≤ 16	≥ 245	400–550	≥ 21
> 16 – 40	≥ 235	400–550	≥ 21

 

 

 

 

In general industrial construction, SMA400CW is often chosen for outdoor structures exposed to alternating wet and dry cycles, where conventional carbon steel would require constant repainting. Engineers prefer this grade because it delivers long service life, low lifecycle cost, and a natural weathered appearance that blends well with architectural and environmental aesthetics.

 

Common applications include:

Bridges, overpasses, and railway infrastructure

Building facades, roofing panels, and exterior cladding

Transmission towers and telecommunication structures

Outdoor sculptures, signage, and landscaping features

Marine and port structures where salt spray is moderate

 

 

 

 

 

 

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