ASTM A36 Structural Carbon Steel Coil is a widely used hot‑rolled mild steel coil known for its excellent weldability, good strength, and reliable forming performance. It is commonly used in construction, steel structures, machinery fabrication, and general engineering applications.
A36 is the most recognized structural steel grade in the ASTM system. Equivalent international grades include:
EN S235JR / S275JR
JIS SS400
GB Q235B
These equivalents are provided only for reference; ASTM A36 remains the primary standard for international buyers.
🟧 Standards
ASTM A36 – Standard Specification for Carbon Structural Steel
EN 10025‑2 S235JR / S275JR (Equivalent)
JIS G3101 SS400 (Equivalent)
GB/T700 Q235B (Equivalent)
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 A36 (Primary international grade)
Equivalent Chinese Grade: Q235B
Equivalent Japanese Grade: SS400
Equivalent European Grade: S235JR
🟧 Product Specifications & Available Sizes
Dimensions
Thickness: 1.2 – 20 mm
Width: 600 – 2000 mm
Coil ID: 508 mm / 610 mm
Coil OD: 900 – 2000 mm
Coil Weight: 3 – 15 MT
Regular Sizes mm
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
Tolerances
Thickness tolerance: ±0.02–0.10 mm
Width tolerance: ±2 mm
Flatness: As per ASTM A36 / HR tolerance standards
Surface Finish
Hot rolled black
Pickled & oiled
Coating
Optional anti‑rust oil coating
Hardness
Typical HRB: 60–80
🟧 Chemical Composition (ASTM A36)
Element
Max (%)
C
0.25
Mn
0.80–1.20
P
0.040
S
0.050
Si
0.40
🟧 Mechanical Properties (ASTM A36)
Property
Value
Yield Strength
≥ 250 MPa
Tensile Strength
400–550 MPa
Elongation
≥ 20%
🟧 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
Steel frames and beams
Machinery manufacturing
Automotive components
General fabrication
Engineering structures
🟧 Why Use ASTM A36 Structural Carbon Steel Coil
Excellent weldability and formability
Stable mechanical strength for structural applications
Cost‑effective and widely available
Suitable for large‑scale fabrication and engineering projects
