JIS G3114 SMA570P Corten Steel: Advanced Weathering Steel for Structural Longevity & Cost Efficiency.
Built for Harsh Environments: Bridges, Railcars & Industrial Machinery
JIS G3114 SMA570P is a high-performance weathering steel (Corten steel) engineered to resist atmospheric corrosion 3–5x better than standard carbon steel. Its patented self-regenerating oxide layer forms under alternating wet/dry cycles, eliminating painting needs in bridges, shipping containers, and power plant components like economizers.
Certifications & Core Benefits
- JIS G3114 & ASTM A871 Certified: Compliant with EN 10025-5 for structural reliability.
- Cost Savings: 35% lower lifetime costs vs. painted alternatives due to zero upkeep.
- Custom Dimensions: Thickness 3–150mm (±0.5mm), width up to 4,000mm.
- MOQ 1 Ton: Available as plates, sheets, or structural sections (U-channels, H-beams).
Technical Specifications
Chemical Composition (Weight %)
| Element | C (max) | Si (max) | Mn (max) | P (max) | S (max) | Cr | Cu |
|---|---|---|---|---|---|---|---|
| SMA570P | 0.18 | 0.55 | 1.40 | 0.035 | 0.035 | 0.30–0.55 | 0.20–0.35 |
Alloy Design:
- Chromium (0.30–0.55%): Forms a stable rust barrier to halt corrosion spread.
- Copper (0.20–0.35%): Enhances atmospheric resistance in coastal/industrial zones.
- Low Carbon (0.18%): Optimizes weldability (AWS D1.5 compliant) without sacrificing strength.
Mechanical Properties
| Yield Strength (Rp0.2) | Tensile Strength (Rm) | Elongation (A50) | Charpy Impact (-20°C) | Hardness (HBW) |
|---|---|---|---|---|
| 420–460 MPa | 570–720 MPa | 19–26% | ≥25J (EN ISO 148-1) | 140–190 |
Performance Highlights:
- 720 MPa Tensile Strength: 20% stronger than SMA570W variants.
- 25J Impact Toughness: Suitable for subzero Arctic infrastructure projects.
- Versatile Processing: Hot-rolled, TMCP, or QT-treated for precision tolerances.
Applications
- Infrastructure: Bridge girders, transmission towers, and highway signposts.
- Transportation: Railcar underframes, container walls, and trailer chassis.
- Energy: Air preheater ducts, boiler casings, and chimney liners.
- Architecture: Sculptures, sunshades, and rooftop support beams.
Fabrication Guidelines
- Cutting: Laser or plasma (pre-heat to 100°C for thickness >30mm).
- Welding: Use E7018-G electrodes with 120–150°C preheat (AWS D1.5).
- Bending: Minimum radius = 3x plate thickness (cold-formed).
- Patina Development: Requires 6–24 months of outdoor exposure for full corrosion resistance.
Quality Assurance
- Ultrasonic Testing: EN 10160 Class E1 for defect-free consistency.
- Salt Spray Test: 1,000+ hours (ASTM B117) validating corrosion performance.
- Certifications: EN 10204 3.1 MTRs, CE, and PED compliance.
Competitive Edge
- Lifespan: 50+ years in coastal/industrial environments without coatings.
- Lead Time: 15–25 days (MOQ 1 ton).
- Sustainability: 100% recyclable with 18% lower CO₂ emissions than stainless steel.
Logistics & Compliance
- Packaging: VCI film + edge guards for海运.
- Temperature Limits: Suitable for -40°C to 380°C service.
- Custom Coatings: Optional galvanized (GI) or Al-Zn (AZ) finishes.
Logical Connectors:
- Comparison: While stainless steel resists corrosion, SMA570P is more economical.
- Example: For instance, SMA570P is used in marine bridge construction.
- Cause-Effect: Copper content (0.20–0.35%) enhances coastal corrosion resistance.
Request Free Samples or Technical Datasheets Today!
Certifications: JIS, ASTM, EN. Global delivery available.
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