JIS G3101 SS400/SS490/SS540 Carbon Steel Coil

JIS G3101 SS400/SS490/SS540 carbon steel coils are ‌general-purpose structural steels‌ compliant with ‌JIS G3101‌, ‌ASTM A36‌, and ‌EN 10025 S235JR/S355JR‌. Designed for bridges, shipbuilding, and machinery frames, these grades offer ‌215–400 MPa yield strength‌ with ‌18–23% elongation‌ and ‌excellent weldability‌. SS400 (basic grade) to SS540 (high-tensile) reduce material costs by ‌12–18%‌ compared to alloy steels while maintaining structural integrity in temperatures down to ‌-10°C‌.
We offer JIS G3101 SS400/SS490/SS540 Carbon Steel Coil and related grades with 100% factory direct pricing and free quotes available within 6 hours.

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Product Introduction

‌JIS G3101 SS400/SS490/SS540 Carbon Steel Coil: Versatile Structural Steel for Industrial Use


‌Product Overview‌

JIS G3101 SS400/SS490/SS540 carbon steel coils are ‌general-purpose structural steels‌ compliant with ‌JIS G3101‌, ‌ASTM A36‌, and ‌EN 10025 S235JR/S355JR‌. Designed for bridges, shipbuilding, and machinery frames, these grades offer ‌215–400 MPa yield strength‌ with ‌18–23% elongation‌ and ‌excellent weldability‌. SS400 (basic grade) to SS540 (high-tensile) reduce material costs by ‌12–18%‌ compared to alloy steels while maintaining structural integrity in temperatures down to ‌-10°C‌.


‌Key Technical Specifications‌

‌1. Production & Dimensions‌

  • ‌Process‌:
    • Hot-rolled: 2.75–100mm (±1.5% thickness tolerance, JIS B 0408)
    • Cold-rolled: 0.2–3mm (±0.5% tolerance)
  • ‌Width‌: 45–2,200mm (compatible with laser cutting systems)
  • ‌Surface‌: Mill finish (Ra 15µm), wire-brushed (Ra 4µm), or PVC-coated (anti-corrosion)

‌2. Chemical Composition‌

Grade C (≤) Mn (≤) P (≤) S (≤) CEV (IIW)
SS400 0.30% 0.60% 0.050% 0.050% 0.25
SS540 0.30% 1.60% 0.040% 0.040% 0.42

Trace elements: Cu ≤0.35%, Si ≤0.35% (SS540)


‌Mechanical Properties‌

Grade Thickness (mm) Yield Strength (MPa) Tensile Strength (MPa) Elongation (%)
‌SS400‌ ≤16 245 400–510 21
‌SS540‌ ≤40 400 540–650 18

Tested per JIS Z 2241 (tensile) & JIS Z 2242 (Brinell hardness: 120–160 HBW)


‌Performance Advantages‌

  1. ‌Cost-Effective Fabrication‌:
    • ‌Bend radius‌: 1.5× thickness (JIS B 0701 compliant).
    • Welding speed: ‌1.1 m/min‌ with E6013 electrodes (SS540, 12mm plate).
  2. ‌Durability in Harsh Environments‌:
    • ‌Salt spray resistance‌: 500 hours (SS400 with galvanized coating).
    • Suitable for coastal infrastructure like harbor cranes.
  3. ‌Thermal Performance‌:
    • Thermal expansion: ‌11.7 µm/m°C‌ (20–100°C).
    • Conductivity: ‌49 W/m·K‌ (SS400 at 25°C).
  4. ‌Impact Resistance‌:
    • Charpy V-notch: ‌27J at -10°C‌ (SS540, 25mm thickness).

‌Applications by Grade‌

Grade Industry Use Case
SS400 Construction Warehouse support beams
SS490 Shipbuilding Bulkhead reinforcement
SS540 Energy Hydraulic turbine frames

‌Global Equivalents‌

JIS G3101 ASTM EN 10025 DIN 17100
SS400 A36 S235JR St37-2
SS540 A572 Gr.50 S355JR St52-3

‌Sustainability & Compliance‌

  • ‌Recycled Content‌: 78% (mill-certified)
  • ‌RoHS Compliance‌: Chromium <0.15%, Nickel-free
  • ‌Certifications‌: JIS Mark, ISO 9001:2015

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G90 Galvanized Sheet supplier

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.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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