JIS G3114 SMA400BW Corten Steel Strong, Sustainable
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JIS G3114 SMA400BW Corten Steel
Why Engineers Choose SMA400BW
Engineers and designers select SMA400BW for several key reasons:
Corrosion Resistance without Coating
SMA400BW develops a dense, adherent rust layer that resists further corrosion. This reduces reliance on protective coatings, saving maintenance cost.
Structural Strength
With tensile strength above 400 MPa and balanced yield properties, it can be used in medium-load structural components without compromising safety.
Toughness in Outdoor Conditions
SMA400BW is engineered to perform reliably in outdoor weather conditions, including cycles of wetting and drying.
Aesthetic Value
The steel develops a natural rust-brown appearance, which blends with landscapes and architectural designs, making it a popular choice in modern construction and civil engineering projects.
Sustainability
Since the steel does not require painting in many applications, it reduces the use of solvents and coatings, aligning with sustainable building practices.
Chemical Composition of SMA400BW
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Silicon (Si) | ≤ 0.50 |
| Manganese (Mn) | ≤ 1.20 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Copper (Cu) | 0.25 – 0.55 |
| Chromium (Cr) | 0.30 – 1.25 |
| Nickel (Ni) | ≤ 0.65 |
| Iron (Fe) | Balance |
Mechanical Properties of SMA400BW
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 245 – 355 (depending on thickness) |
| Tensile Strength (MPa) | 400 – 510 |
| Elongation (%) | ≥ 18 |
| Impact Toughness | Adequate for standard structural use (20°C test temperature) |
| Hardness (HB) | Approx. 140 – 170 |
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