🟧 Product Overview
ASTM A633 Structural Carbon Steel Coil is a normalized high‑strength low‑alloy steel designed for welded structures requiring improved notch toughness and impact resistance. It is widely used in bridges, offshore structures, heavy machinery, and other demanding engineering applications.
A633 is typically supplied in Grades C, D, and E, each offering high strength combined with good toughness. Compared with conventional structural steels, ASTM A633 provides enhanced performance in low‑temperature and dynamic loading conditions, making it suitable for critical welded structures.
🟧 Standards
ASTM A633 – Normalized High‑Strength Low‑Alloy Structural Steel for Welded Structures
Structural Carbon Steel Standard – International Comparison Table
Country Standard Common Grades China GB/T 700 / GB/T 1591 Q235B, Q275, Q355B/C/D/E America ASTM A36 / A572 / A633 / A656 A36, A572 Gr50, A633, A656 Germany DIN 17100 ST37‑2, ST52‑3 Japan JIS G3101 SS400, SS490, SS540 France NF EN 10025 S235JR, S275JR, S355JR Britain BS EN 10025 S235JR, S275JR, S355JR International (EN) EN 10025‑2 S235 / S275 / S355
🟧 Available Grades
ASTM A633 Grade C
ASTM A633 Grade D
ASTM A633 Grade E
🟧 Product Specifications & Available Sizes
Dimensions
(International standard display)
Thickness: 1.8 – 20 mm
Width: 1000 – 2000 mm
Coil ID: 508 mm / 610 mm
Coil OD: 900 – 2000 mm
Coil Weight: 3 – 15 MT
Regular Sizes (mm)
Size Size 1.8 × 1250 × C 4.5 × 1500 × C 2.0 × 1250 × C 4.75 × 1500 × C 2.5 × 1250 × C 5.5 × 1500 × C 2.75 × 1250 × C 5.75 × 1500 × C 2.75 × 1500 × C 7.5–11.75 × 1500 × C 3.0 × 1500 × C 5.75 × 1800 × C 3.5 × 1500 × C 5.75 × 2000 × C 3.75 × 1500 × C 7.75 × 2000 × C
🟧 Chemical Composition (ASTM A633 Grade C – typical)
Element Max (%) C 0.20 Mn 1.15–1.50 P 0.035 S 0.040 Si 0.15–0.50 Nb / V Micro‑alloyed (when specified)
(Values are typical for Grade C; other grades are similar HSLA compositions with controlled carbon and alloying for toughness.)
🟧 Mechanical Properties (ASTM A633 Grade C – typical)
Property Value Yield Strength ≥ 345 MPa Tensile Strength 485–620 MPa Elongation ≥ 18% Impact Toughness Improved notch toughness (normalized condition)
🟧 Physical Properties
Density: 7.85 g/cm³
Modulus of elasticity: 200 GPa
Thermal expansion: 12×10⁻⁶ /K
🟧 Manufacturing Processes
Hot rolling
Normalizing
Pickling
Leveling
Slitting / Cutting to length
Surface oiling
🟧 Primary Industry Usage
Welded steel structures
Bridges and heavy structural components
Offshore and marine structures
Heavy machinery and equipment
Engineering and construction projects
Fabricated load‑bearing parts
🟧 Why Use ASTM A633 Structural Carbon Steel Coil
Normalized HSLA steel with high strength and toughness
Excellent performance in welded structures and low‑temperature service
Good weldability and formability for complex fabrications
Suitable for critical structural applications with demanding loading conditions
🟧 Why Choose WelSteels
Complete range of structural HSLA steel coils
Consistent quality and dimensional accuracy
Custom coil cutting and slitting services
Third‑party inspection (SGS / BV) available
Export‑grade seaworthy packaging
Reliable lead times for global projects
