SMA490AP Corten steel plate

‌JIS G3114 SMA490AP Corten Steel: Advanced Weathering Steel for Industrial & Structural Longevity‌. ‌Engineered for Corrosion Resistance: Bridges, Railcars & Power Infrastructure.‌ JIS G3114 SMA490AP is a ‌low-alloy high-strength weathering steel‌ designed to withstand atmospheric corrosion 4–8x longer than conventional carbon steel. Its ‌self-protective rust layer‌ forms naturally under cyclic wet/dry exposure, eliminating painting requirements for bridges, shipping containers, and power plant components like economizers.
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Product Introduction

JIS G3114 SMA490AP Corten Steel: Advanced Weathering Steel for Industrial & Structural Longevity‌.

‌Engineered for Corrosion Resistance: Bridges, Railcars & Power Infrastructure.‌

JIS G3114 SMA490AP is a ‌low-alloy high-strength weathering steel‌ designed to withstand atmospheric corrosion 4–8x longer than conventional carbon steel. Its ‌self-protective rust layer‌ forms naturally under cyclic wet/dry exposure, eliminating painting requirements for bridges, shipping containers, and power plant components like economizers.


‌Certifications & Key Advantages‌

  • ‌JIS G3114 & ASTM A588 Gr.C Certified‌: Compliant with EN 10025-5 for structural reliability.
  • ‌Cost Efficiency‌: 35% lower lifecycle costs vs. painted alternatives (zero maintenance).
  • ‌Custom Sizing‌: Thickness 3–150mm (±0.5mm), width up to 4,000mm.
  • ‌MOQ 1 Ton‌: Available as hot-rolled plates, cold-rolled sheets, or prefabricated sections.

‌Technical Specifications‌

‌Chemical Composition (Weight %)‌

Element C (max) Si (max) Mn (max) P (max) S (max) Cr Cu Ni (max)
SMA490AP 0.18 0.55 1.40 0.035 0.035 0.30–0.55 0.20–0.35 0.35

‌Carbon Equivalent‌:
Ceq=C+Mn6+(Cr+Mo+V)5+(Ni+Cu)15≤0.45%
Ensures superior weldability (AWS D1.5 compliant).

‌Alloy Design‌:

  • ‌Chromium (0.30–0.55%)‌: Stabilizes surface rust to block corrosion penetration.
  • ‌Copper (0.20–0.35%)‌: Enhances resistance to coastal/industrial atmospheres.
  • ‌Low Carbon (0.18%)‌: Reduces cracking risk during welding.

‌Mechanical Properties‌

Thickness (mm) Yield Strength (Rp0.2) Tensile Strength (Rm) Elongation (A50) Charpy Impact (0°C) Hardness (HBW)
≤16 ≥365 MPa 490–610 MPa ≥15% ≥27J (EN ISO 148-1) 135–185
16–40 ≥355 MPa
40–75 ≥335 MPa
75–100 ≥325 MPa
100–160 ≥305 MPa
160–200 ≥295 MPa

‌Performance Highlights‌:

  • ‌610 MPa Tensile Strength‌: 18% stronger than ASTM A588 Gr.C.
  • ‌27J Impact Toughness‌: Suitable for moderate low-temperature environments (-20°C).
  • ‌Precision Processing‌: Hot-rolled, TMCP, or QT-treated for ±0.2mm thickness tolerance.

‌Applications‌

  1. ‌Infrastructure‌: Bridge girders, transmission towers, and highway guardrails.
  2. ‌Transportation‌: Railcar underframes, container walls, and trailer chassis.
  3. ‌Energy‌: Air preheater ducts, boiler casings, and chimney stacks.
  4. ‌Architecture‌: Sculptures, façades, and rooftop support beams.

‌Fabrication Guidelines‌

  • ‌Cutting‌: Laser/plasma with pre-heat (120°C for >30mm thickness).
  • ‌Welding‌: Use E7018-G electrodes (preheat 150–200°C).
  • ‌Bending‌: Minimum radius = 3x plate thickness (cold-formed).
  • ‌Patina Formation‌: Achieves full corrosion resistance after 6–18 months.

‌Quality Assurance‌

  • ‌Ultrasonic Testing‌: EN 10160 Class E1 for internal defect detection.
  • ‌Salt Spray Test‌: 1,200+ hours (ASTM B117) validating corrosion resistance.
  • ‌Certifications‌: EN 10204 3.1 MTRs, CE, and PED compliance.

‌Competitive Edge‌

  • ‌Lifespan‌: 55+ years in coastal/industrial zones without coatings.
  • ‌Lead Time‌: 15–25 days (MOQ 1 ton).
  • ‌Sustainability‌: 100% recyclable with 20% lower CO₂ footprint than stainless steel.

‌Logistics & Compliance‌

  • ‌Packaging‌: VCI film + edge protectors for.
  • ‌Temperature Range‌: Suitable for -25°C to 400°C service.
  • ‌Optional Coatings‌: Galvanized (GI) or Al-Zn (AZ) upon request.

‌Comparative Analysis‌

Steel Grade Yield Strength (MPa) Tensile Strength (MPa) Thickness Range (mm) Key Applications
‌SMA490AP‌ ≥295–365 490–610 ≤200 Bridges, Heavy machinery
ASTM A588 Gr.C ≥345 ≥485 ≤101.6 Transmission towers

‌Request Free Samples or Technical Datasheets Today!‌
Certifications: JIS, ASTM, EN. Worldwide shipping available.

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Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

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