Certified JIS G3114 SMA400AP Weathering Steel
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JIS G3114 SMA400AP Weathering Steel
Intelligent Patina Control
Phase-balanced oxide layer maintains optimal 40-60μm thickness
Automatic pore-sealing during wet/dry transitions
◉ Seismic-Enhanced Properties
Ultra-low yield ratio (0.75 max) for earthquake zones
Through-thickness Z25 compliance
◉ Next-Level Fabrication
Laser-welding optimized grain structure
Cold-forming tolerance to R/t=3 without cracking
JIS G3114 SMA400AP Weathering Steel represents a breakthrough evolution in atmospheric corrosion resistance, specifically engineered for Pacific Rim infrastructure challenges. Unlike conventional weathering steels, this JIS-certified grade incorporates a proprietary triple-phase alloy system that delivers:
30% faster protective patina formation in high-salinity environments
Unmatched resistance to acid rain corrosion (pH 3.5-5.0 range)
Stable performance under extreme thermal cycling (-30°C to +60°C)
Performance Benchmarking
| Characteristic | SMA400AP | Standard Corten |
|---|---|---|
| Coastal Corrosion Rate | 0.015mm/yr | 0.035mm/yr |
| Urban Patina Stability | 18 months | 36 months |
| Weld HAZ Toughness | 45J @ -10°C | 27J @ -10°C |
Exhibition
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