DX51D+Z275 galvanized steel is a high-quality cold-rolled steel sheet and coil with a heavy zinc coating (275 g/m²) designed for superior corrosion resistance in harsh environments.
It is widely used in building structures, industrial equipment, automotive components, and appliance panels due to its excellent combination of formability, weldability, and durability.
Supplied by Gnee Group, an ISO-certified steel manufacturer from China, DX51D+Z275 galvanized steel meets international standards including EN 10346, ASTM, JIS, GB, and DIN, ensuring consistent quality for global projects.
Product Specifications
| Parameter | Specification |
|---|---|
| Material Grade | DX51D (EN 10346) |
| Zinc Coating | Z275 (275 g/m² double-sided) |
| Thickness | 0.12 – 6.0 mm |
| Width | 600 – 1250 mm |
| Standard | EN, JIS, ASTM, GB, DIN |
| Surface Finish | Large spangle, regular spangle, minimal spangle, zero spangle |
| Forming Capability | Cold bending, stamping, shearing, welding |
| Delivery | Coil or cut-to-length as per customer request |
| Price Range | 600–800 USD/ton (subject to market) |
Chemical Composition
| Element | Range (%) | Effect |
|---|---|---|
| Carbon (C) | ≤0.12 | Ensures excellent cold formability and weldability |
| Manganese (Mn) | ≤0.60 | Improves strength and toughness |
| Phosphorus (P) | ≤0.10 | Controlled to prevent cold brittleness |
| Sulfur (S) | ≤0.045 | Excess reduces ductility and weldability |
| Silicon (Si) | ≤0.50 | Improves strength, avoid excessive surface defects |
| Aluminum (Al) | ≥0.015 | Grain refinement, toughness improvement |
| Other residuals (Cr, Ni, Cu) | ≤0.70 | Minor effects on overall performance |
Mechanical Properties
| Property | Typical Range | Test Method |
|---|---|---|
| Tensile Strength (Rm) | 270–350 MPa | ISO 6892-1 |
| Yield Strength (Rp0.2) | ≥140 MPa | ISO 6892-1 |
| Elongation (A80) | ≥22% | ISO 6892-1 |
| Hardness (HV) | 70–130 HV | ISO 6507 |
| Bending | 180° cold bend, no cracks | ISO 7438 |
| Coating Adhesion | No flaking or peeling | ISO 1460 |
Advantages of DX51D+Z275
Superior Corrosion Resistance: Heavy Z275 zinc coating provides long-term protection against rust, especially in coastal and industrial environments.
Excellent Formability: Low carbon content allows deep drawing, stamping, and cold bending without cracking.
Weldability: Suitable for spot welding, seam welding, and arc welding.
Durable Surface: High-quality spangle or smooth finishes support painting or direct use.
Versatile Applications: Perfect for construction, automotive, appliances, HVAC systems, and industrial machinery.
Typical Applications
| Application | Advantages |
|---|---|
| Building Roofing & Siding | Corrosion resistance, wind pressure resistance, long-term durability |
| Automotive Structural Components | High formability, weldability, consistent surface quality |
| Home Appliance Panels | Smooth finish, precise molding, paint adhesion |
| Agricultural Equipment & Industrial Machinery | Strength, corrosion resistance, low maintenance |
Contact Gnee Group today to request a quote for DX51D+Z275 galvanized steel coil or sheet. We supply ISO-certified, international-standard galvanized steel that meets the highest quality requirements for construction, industrial, and automotive applications worldwide.
Q1: What does the designation "DX51D+Z" mean?
A: This is a standard European (EN) designation for a hot-dip galvanized steel grade:
DX: Indicates it is a forming steel primarily for cold forming applications.
51: A numerical designator specifying a base steel with a minimum yield strength typically ≤ 280 MPa and specific mechanical properties suitable for forming.
D: Denotes the ductility level. "D" stands for "Drawing" quality, indicating good to very good ductility for deep drawing applications.
+Z: Specifies the coating: hot-dip galvanized with a zinc coating.
Q2: What are its primary mechanical properties?
A: According to EN 10346, the typical properties are:
Yield Strength (Re): Usually 140 - 300 MPa (Note: No specific minimum is mandated; it's based on the base steel chemistry for formability).
Tensile Strength (Rm): 270 - 500 MPa.
Elongation (A₈₀): Typically ≥ 22% - 26% (minimum depends on thickness). This high elongation is key for its formability.
It is not a high-strength steel. Its value lies in its excellent formability and corrosion protection.
Q3: What is the "Z" coating, and what are typical coating weights?
A: The "Z" stands for a massive zinc coating applied via the continuous hot-dip galvanizing process. The coating weight is specified by a suffix (e.g., Z140, Z275):
Example - DX51D+Z140: Minimum total coating mass of 140 g/m² (approx. 20 µm per side, 40 µm total). Common codes are Z100 (light), Z140 (standard), Z200/Z225 (heavy), and Z275 (extra heavy for severe environments).
Q4: What are the main applications for DX51D+Z?
A: It is the workhorse steel for general fabrication where corrosion resistance and formability are needed, but not high structural strength. Common uses include:
HVAC ductwork and components.
Appliance housings (washing machines, dryers, enclosures).
Light gauge building panels and profiles.
General metal cabinets, enclosures, and light furniture.
Agricultural and industrial containers.