Hot‑Dip Galvanized (HDG) Steel Plate is produced by immersing carbon steel into a molten zinc bath, forming a metallurgically bonded zinc‑iron alloy layer that provides:
Excellent corrosion resistance
Long‑term durability in outdoor environments
Strong adhesion and scratch resistance
Good weldability and formability
HDG steel plate is widely used in construction, infrastructure, automotive, HVAC, and industrial manufacturing.
Suitable for structural and industrial applications
🟪 Included Grades
Commercial Grades
DX51D / DX52D
SGCC / SGCH
Structural Grades
S250GD / S280GD / S350GD
🟪 Mechanical Properties (Typical)
Grade
Yield Strength
Tensile Strength
Elongation
Notes
DX51D
≥140 MPa
270–500 MPa
≥22%
Standard HDG steel
S250GD
≥250 MPa
330–500 MPa
≥20%
Structural grade
S350GD
≥350 MPa
420–550 MPa
≥18%
High‑strength grade
🟪 Chemical Composition (Typical)
Grade
C (%)
Mn (%)
Si (%)
P (%)
S (%)
Notes
DX51D
≤0.12
≤0.60
≤0.50
≤0.10
≤0.045
Standard GI steel
S350GD
≤0.20
≤1.70
≤0.60
≤0.10
≤0.045
High‑strength
🟪 Physical Properties (General)
Density: 7.85 g/cm³
Corrosion Resistance: High
Zinc Adhesion: Excellent
Service Life: 10–30 years depending on zinc coating
Surface Smoothness: Regular or zero spangle
🟪 Applications
Roofing and wall panels
Construction and structural components
HVAC ducts and ventilation systems
Automotive parts
Electrical cabinets and appliances
Agricultural equipment
Industrial fabrication
🟪 Why Use It
Hot‑dip galvanized steel plate provides durable, long‑lasting corrosion protection, making it ideal for outdoor, structural, and industrial applications. Its zinc coating ensures excellent resistance to rust, moisture, and harsh environments, while maintaining good formability and weldability.
