Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of en10346 dx51d z180 z275 galvanized steel sheet plate in China. Welcome to wholesale customized en10346 dx51d z180 z275 galvanized steel sheet plate at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
What is DX51D Galvanized Steel?
DX51D galvanized steel is a commercial-grade cold-forming hot-dip galvanized steel sheet, strictly compliant with EN 10346:2015 standard. It is made of low-carbon steel substrate, which is immersed in molten zinc (around 450°C) through a continuous hot-dip galvanizing process to form a dense, metallurgically bonded zinc coating on the surface. This coating provides dual protection: physical barrier protection (isolating steel from corrosion media like oxygen and water) and cathodic (sacrificial) protection (zinc corrodes first to protect the steel substrate). DX51D is designed for cold forming, with excellent ductility and processability, making it easy to bend, roll form, and shallow draw without cracking.
The designation of DX51D has clear meanings: D = cold-forming steel, X = unalloyed steel, 51 = commercial quality grade, and the final D = hot-dip galvanized pure zinc coating, indicating its suitability for general forming and coating applications.
What Do Z180 & Z275 Mean?
Z180 and Z275 are designations for the total zinc coating weight (per square meter) on both sides of DX51D galvanized steel sheets, as defined by international galvanized coating standards. The number after "Z" represents the minimum total zinc coating weight in g/m², which directly determines the corrosion resistance and service life of the steel sheet:
- Z180: The minimum total zinc coating weight is 180g/m² (approximately 90g/m² per side), equivalent to ASTM G60 standard. It provides moderate corrosion protection, suitable for indoor or mild outdoor environments with low corrosion risk, balancing cost and basic durability.
- Z275: The minimum total zinc coating weight is 275g/m² (approximately 137.5g/m² per side), equivalent to ASTM G90 standard. It offers enhanced corrosion resistance, ideal for harsh outdoor, coastal, and industrial environments, significantly extending the service life of the steel sheet.
Both Z180 and Z275 use pure zinc (99.9%+) for the coating, ensuring strong adhesion to the DX51D substrate and consistent performance across applications.
DX51D Steel Specifications Table
The following specifications table covers the chemical composition, mechanical properties, and coating parameters of DX51D galvanized steel sheet Z180 & Z275, all compliant with EN 10346:2015 and EN 10143 standards.
|
Item |
Specification (DX51D Z180 & Z275) |
Test Method |
|---|---|---|
|
Chemical Composition (Substrate, Max %) |
||
|
Carbon (C) |
0.18 |
EN ISO 10700 |
|
Manganese (Mn) |
1.20 |
EN ISO 10700 |
|
Phosphorus (P) |
0.12 |
EN ISO 10700 |
|
Sulfur (S) |
0.045 |
EN ISO 10700 |
|
Silicon (Si) |
0.50 |
EN ISO 10700 |
|
Titanium (Ti) |
0.30 |
EN ISO 10700 |
|
Iron (Fe) |
Balance |
EN ISO 10700 |
|
Mechanical Properties |
||
|
Yield Strength (Re) |
270 - 350 MPa |
EN ISO 6892-1 |
|
Tensile Strength (Rm) |
290 - 500 MPa |
EN ISO 6892-1 |
|
Elongation (A80) |
≥ 22% |
EN ISO 6892-1 |
|
Coating Adhesion |
Passes 180° reverse bending test, no flaking |
EN ISO 1461 |
|
Zinc Coating Parameters |
||
|
Z180 Coating Weight |
Min 180 g/m² (total, both sides) |
EN ISO 1461 |
|
Z275 Coating Weight |
Min 275 g/m² (total, both sides) |
EN ISO 1461 |
|
Coating Type |
Hot-dip galvanized (pure zinc) |
EN 10346 |
|
Surface Finish |
Regular spangle / minimized spangle (optional) |
EN 10143 |
|
Product Dimensions |
||
|
Thickness |
0.3 - 3.0 mm |
EN 10143 |
|
Width |
600 - 1520 mm (customizable) |
EN 10143 |
|
Length |
2000 - 12000 mm (customizable) |
EN 10143 |
Main Application Scenarios
Construction: Indoor wall panels, ceiling grids, indoor fencing, non-load-bearing frames, and sheltered cladding.
HVAC Systems: Indoor air ducts, ventilation casings, and heat exchanger components (protected from outdoor elements).
General Manufacturing: Appliance housings, electrical enclosures, shelving, light-duty containers (indoor storage), and decorative panels.
Automotive: Indoor vehicle components, truck interior parts, and non-exposed body panels.
Agricultural Machinery: Indoor storage equipment and non-exposed structural parts.
DX51D Galvanized Steel Prices
The price of DX51D galvanized steel sheet is affected by factors such as zinc coating weight, product dimensions (thickness, width, length), order quantity, surface finish, and delivery location. To provide you with the most accurate and competitive quotation, please leave your required product information, and our professional team will contact you promptly with a detailed quote.
Required Product Information for Quotation:
Grade: DX51D Z180 / DX51D Z275
Thickness, Width, and Length
Surface Finish (regular spangle / minimized spangle)
Order Quantity
Delivery Location
|
Coating designation |
Minimum total coating mass, both surfaces * |
Guidance value for coating thickness per surface |
|---|---|---|
|
Z100 |
100 |
7 |
|
Z140 |
140 |
10 |
|
Z180 |
180 |
13 |
|
Z200 |
200 |
14 |
|
Z225 |
225 |
16 |
|
Z275 |
275 |
20 |
|
Z350 |
350 |
25 |
|
Z450 |
450 |
32 |
|
Z600 |
600 |
42 |
|
ZA095 |
95 |
7 |
|
ZA130 |
130 |
10 |
|
ZA155 |
155 |
11 |
|
ZA185 |
185 |
14 |
|
ZA200 |
200 |
15 |
|
ZA255 |
255 |
20 |
|
ZA300 |
300 |
23 |
|
ZF080 |
80 |
6 |
|
ZF100 |
100 |
7 |
|
ZF120 |
120 |
8 |
|
ZF140 |
140 |
10 |
Production Lines
GNEE Partners
Frequently Asked Questions (FAQ)
1. What is the difference between DX51D Z180 and DX51D Z275?
The only core difference is the zinc coating weight: Z180 has a minimum total zinc coating of 180g/m², suitable for mild environments with cost efficiency; Z275 has 275g/m², offering superior corrosion resistance for harsh environments. They share the same DX51D substrate, so their mechanical properties and formability are identical.
2. Can DX51D galvanized steel sheets be bent or formed?
Yes. DX51D is a cold-forming grade designed for bending, roll forming, and shallow drawing. With an elongation of ≥22%, it can be formed into various shapes without cracking, making it suitable for diverse fabrication needs.
3. Is DX51D Z275 suitable for coastal areas?
Absolutely. DX51D Z275 has a thicker zinc coating (275g/m²), which provides strong resistance to saltwater corrosion. It is the optimal choice for coastal construction, marine equipment, and other high-humidity, high-corrosion environments, with a typical service life of 15–25 years in coastal areas.
4. Can DX51D Z180/Z275 be painted or coated?
Yes. Both grades have a smooth zinc surface that provides excellent adhesion for painting, powder coating, and other surface treatments. Light pre-treatment (cleaning or sanding) can further enhance the durability of the secondary coating, making them suitable for decorative or high-protection applications.
5. Do you provide quality certificates for DX51D Z180/Z275?
Yes. All our DX51D galvanized steel sheets Z180 & Z275 come with original Material Test Reports (MTRs), including detailed data on chemical composition, mechanical properties, zinc coating weight, and compliance with EN 10346:2015 standard, ensuring product quality and traceability.
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