galvanized steel
DX51D galvanized steel is one of the most widely used hot-dip galvanized steels in global structural and panel applications. Under the European standard EN 10346, the grade DX51D defines a low-carbon cold-forming steel substrate that, when coated with zinc via hot-dip galvanizing, delivers a high level of corrosion resistance and excellent formability for a wide range of industrial uses.
What DX51D Means in Standards
| Code | Meaning |
|---|---|
| D | Cold-forming steel suitable for galvanizing |
| X51 | Performance grade with good balance of mechanical properties |
| +Z | Hot-dip galvanized zinc coating added |
This designation highlights that DX51D galvanized steel is optimized for bending, welding, punching and deep drawing while benefiting from extended corrosion protection.
Chemical Composition of Base Steel
| Element | Max Content (%) |
|---|---|
| C | ≤ 0.12 |
| Mn | ≤ 0.60 |
| P | ≤ 0.10 |
| S | ≤ 0.045 |
| Si | ≤ 0.50 |
Such composition ensures good ductility, weldability and consistent surface quality before galvanizing.
Typical Mechanical Property Range (EN10346)
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | ≥ 140 MPa |
| Tensile Strength | 270–500 MPa |
| Elongation (A80) | ≥ 22% |
| Hardness (HB) | 70–120 HB |
DX51D steel demonstrates a balanced profile of strength and elasticity suitable for deep forming and fabrication processes.
Coating and Corrosion Protection
| Coating Code | Zinc Mass (g/m² both sides) | Approx. Thickness (μm) |
|---|---|---|
| Z60 | 60 | ~9 |
| Z100 | 100 | ~14 |
| Z140 | 140 | ~20 |
| Z180 | 180 | ~26 |
| Z275 | 275 | ~40 |
Higher coating values increase atmospheric corrosion resistance in harsher environments.
Galvanized Surface Selection
|
Use of The Environment |
Recommended Zinc Thickness |
|
Indoor Use |
Z10 or Z12 (100g/㎡or 120g/㎡) |
|
Suburbs |
Z20 and Painting (200g/㎡) |
|
Urban or Industrial Area |
Z27 (270g/㎡) or G90 (US Standard) and painted |
|
Coastal Area |
Thicker than Z27 (270g/㎡) or G90 (US Standard) and painted |
|
Punch or Deep Drawing Application |
Thicker than Z27 (270grams/㎡) or G90 (US Standard) avoid coating peeling after stamping |
Key Applications of DX51D Galvanized Steel
Thanks to its excellent mechanical behavior and corrosion protection, DX51D galvanized steel is widely used in:
- Roofing and wall panels
- Steel structures and purlins
- Automotive body components
- Household appliance casings
- Electrical cabinets
- Agricultural equipment
- Duct systems and ventilation
Its adaptability allows it to serve both structural and decorative functions efficiently.
GNEE STEEL offers certified DX51D galvanized steels with stable coating thickness and traceable quality control systems for global customers in construction, manufacturing, and industrial sectors - ensuring reliability from order to delivery.
- Material Comparison
|
Chinese Standard |
Japan Standard |
European Standard |
|
DX51D Z/DC51D Z (CR) |
SGCC |
DX51D Z |
|
DX52D Z/DC52D Z |
SGCD1 |
DX52D With |
|
DX53D Z/DC53D Z/DX54D Z/DC54D Z |
SGCD2/SGCD3 |
DX53D Z/DX54D Z |
|
S220/250/280/320/350/550GD Z |
SGC340/400/440/490/570 |
S220/250/280/320/350GD Z |
|
DX51D Z/DD51D Z (HR) |
SGHC |
DX51D Z |
