General galvanized steel strip processing process
DX51D Z60/Z80 Galvanized Steel Strip is a hot-dip galvanized low-carbon steel strip manufactured according to EN 10346. It offers excellent formability, corrosion resistance, and weldability, making it an ideal material for roll forming, profiling, stamping, and light structural applications. Z60 and Z80 indicate the total zinc coating mass on both sides of the steel strip, providing different levels of corrosion protection.
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What does DX51D mean?
| D | Flat products for cold forming |
| X | Rolling condition not specified (can be CR or HR) |
| 51 | Steel grade number (higher = better formability) |
| D | Coating type: hot-dip coated (the +Z part of DX51D+Z) |
Product Specifications
| Item | Specification |
|---|---|
| Product Name | DX51D Z60 Z80 Galvanized Steel Strip |
| Steel Grade | DX51D+Z |
| Standard | EN 10346 |
| Zinc Coating | Z60 (60 g/m²), Z80 (80 g/m²) |
| Thickness | 0.15–3.0 mm |
| Width | 20–600 mm (Slitted from coils) |
| Coil ID | 508 mm / 610 mm |
| Surface Finish | Regular Spangle, Minimized Spangle, Zero Spangle |
| Surface Treatment | Chromated, Oiled, Dry, Anti-fingerprint |
| Tensile Strength | 270–500 MPa |
| Elongation | ≥22% |
| Processing | Slitting, Roll Forming, Punching, Cutting |
Z60 vs Z80 Zinc Coating
| Coating | Zinc Weight | Typical Application |
|---|---|---|
| Z60 | 60 g/m² | Indoor equipment, electrical cabinets, furniture, light structural parts |
| Z80 | 80 g/m² | Outdoor structures, cable trays, roofing accessories, HVAC components |
Z80 provides better corrosion resistance than Z60 and is recommended for applications exposed to higher humidity or outdoor environments.
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| EN 10346 | DX51D+Z |
| JIS G3302 | SGCC |
| ASTM A653 | CS Type B / Commercial Steel |
| GB/T 2518 | DC51D+Z |
These grades offer comparable mechanical properties and are commonly used for general-purpose hot-dip galvanized steel products.
Production process
(1) pickling (to remove iron oxide on the surface of the strip)
2) cold rolling (rolling thin, improving wall thickness tolerance, surface finish)
3) galvanized (in the iron substrate to form a zinc-iron alloy layer + zinc layer, anti-corrosion, beautiful)
4) Delivery (part of the product after slitting and slitting, to the net edge state delivery)
Special Note: Some of the thicker galvanized steel strips (such as the thickness of 2.5mm or more), do not need cold rolling, or pickling directly after galvanizing, called pickling straight plating, this mainly depends on the downstream product requirements.
The yield strength of DX51 galvanized metal strips are 270-370MPa, which has high strength and hardness and can meet the requirements of construction, transportation and other fields. In addition, the G.I. strips have good impact resistance and wear resistance, which can maintain good performance in complex environments.
The substrate of the Gi strip is the hot rolled steel plate, which is rolled and cooled at high temperatures and has good plasticity and toughness to meet the requirements of various forming processes. In addition, Gi strip can also be bent, folded, welded and other processing, which is convenient for users to carry out secondary processing.
The surface of hot dip galvanized steel strip has a dense zinc layer, which can effectively prevent the corrosion of the substrate by the atmosphere and moisture, and therefore has excellent corrosion resistance. Under a normal environment, the DX51D galvanized strip can keep its service life for decades.
Specifications of Galvanized steel strip
| Production: | Galvanized steel strip |
| Grade: | DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z, DX56D+Z, DX57D+Z, DC51D+Z, SGCC, SGCD, S220GD+Z, S250GD+Z, S280GD+Z, S320GD+Z, S350GD+Z, S550GD+Z |
| Types: | Commercial / Drawing / Deep Drawing / Structural quality |
| Width: | 20-600mm |
| Thickness: | 0.12-4mm |
| Type of coating: | galvanized |
| Zinc coating: | 30-400gsm |
| Surface treatment: | Oil,Passivation,chromium-free passivating,passivation+oil,chromium-free passivation+oil |
| Surface structure: | zero spangle / minimized spangle / regular spangle/ big spangle |
| Package: | Standard export package (Plastic film in the first layer,second layer is Kraft paper. Third layer is the tray) |
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Packaging and Shipping
Why Choose GNEE STEEL?
GNEE STEEL supplies high-quality DX51D galvanized steel strips for customers worldwide. We offer:
1.Full zinc coating options (Z60–Z275)
2.Precision slitting services
3.Customized strip widths
4.Regular, minimized, and zero spangle surfaces
5.Stable mechanical properties
6.Fast delivery from stock
7.OEM packaging for export
8.Professional technical support and global export experience
Whether you require galvanized steel strips for roll forming, construction, electrical equipment, or industrial manufacturing, GNEE STEEL can provide customized solutions with competitive pricing and reliable quality.
