ST37‑2 and ST52‑3 Structural Carbon Steel Coils are widely used hot‑rolled structural steels under the DIN 17100 standard. ST37‑2 is a mild structural steel with excellent weldability and forming properties, while ST52‑3 is a high‑strength structural steel offering higher yield strength and improved toughness.
These grades are commonly used in construction, machinery manufacturing, steel structures, and general engineering applications. International equivalents include EN S235JR / S355JR and Chinese Q235B / Q355B.
🟧 Standards
DIN 17100 – ST37‑2 / ST52‑3 Structural Steel
EN 10025‑2 S235JR / S355JR (Equivalent)
GB/T700 Q235B / GB/T1591 Q355B (Equivalent)
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
ST37‑2
ST52‑3
Equivalent European Grades: S235JR / S355JR
Equivalent Chinese Grades: Q235B / Q355B
🟧 Product Specifications & Available Sizes
Dimensions
(International standard display — not affected by Regular Sizes)
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 (ST37‑2 – typical)
Element
Max (%)
C
0.17
Mn
1.40
P
0.045
S
0.045
Si
0.30
Chemical Composition (ST52‑3 – typical)
Element
Max (%)
C
0.20
Mn
1.60
P
0.035
S
0.035
Si
0.55
🟧 Mechanical Properties
ST37‑2
Property
Value
Yield Strength
≥ 235 MPa
Tensile Strength
360–510 MPa
Elongation
≥ 20%
ST52‑3
Property
Value
Yield Strength
≥ 355 MPa
Tensile Strength
490–630 MPa
Elongation
≥ 18%
🟧 Physical Properties
Density: 7.85 g/cm³
Modulus of elasticity: 200 GPa
Thermal expansion: 12×10⁻⁶ /K
🟧 Manufacturing Processes
Hot rolling
Pickling
Leveling
Slitting / Cutting to length
Surface oiling
🟧 Primary Industry Usage
Construction and building structures
Machinery manufacturing
Steel frames and beams
General engineering components
Fabricated structural parts
Equipment manufacturing
🟧 Why Use ST37 / ST52 Structural Carbon Steel Coil
Good weldability and forming performance
Reliable mechanical strength for structural applications
Suitable for both mild and high‑strength structural needs
Widely recognized international structural steel grades
