DX51D Galvanized Steel Coil (GI Coil)
DX51D+Z galvanized steel coil, the European standard grade for cold forming and bending. Equivalent to SGCC. Excellent for roofing, HVAC ductwork, and general fabrication. Mill certified to EN 10346.
| Material | Hot-Dip Zinc Coated Cold-Forming Steel Coil |
|---|---|
| Grade / Standard | DX51D+Z |
| Thickness | 0.12mm - 4.0mm |
| Width | 600mm - 1500mm |
| Inner Diameter (ID) | 508mm / 610mm |
| Coil Weight | 3-12 Tons |
| Surface Treatment | galvanized |
| MOQ | 5 Tons |
| Delivery Time | 10-25 Days / In Stock |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of DX51D Galvanized Steel Coil
DX51D is the primary European standard grade for cold-forming galvanized steel coil, specified under EN 10346. The designation ‘DX51D’ indicates a non-structural, cold-forming quality steel, making it exceptionally well-suited for bending, profiling, and moderate drawing applications. The ‘+Z’ signifies that the steel has been hot-dip coated with zinc, providing excellent corrosion protection. DX51D+Z is one of the most widely used and versatile galvanized steel grades globally, serving as the benchmark material for roofing, cladding, HVAC ductwork, and general fabrication where good formability is required without the need for high structural strength.
Key Features of DX51D Grade
The defining characteristic of DX51D+Z is its excellent formability. It is designed to be bent, folded, and profiled without the zinc coating cracking or flaking. This makes it ideal for roll-forming into complex shapes like roofing profiles and ductwork. While EN 10346 does not specify a yield strength for DX51D, it guarantees a tensile strength of 270-500 MPa and elongation of over 22%, ensuring reliable forming performance.
DX51D galvanized coils are available with a wide range of zinc coating weights, most commonly Z100 (100 g/m²), Z140 (140 g/m²), and Z275 (275 g/m²), to match different environmental and service life requirements. The surface can be treated with chromate passivation, anti-fingerprint coating, or oiling. For applications requiring a paintable surface without spangle, a skin-passed, zero-spangle finish can be specified.
Main Applications of DX51D Steel Coil
The excellent formability of DX51D makes it the go-to material for a vast range of applications:
– **Construction:** It is the primary raw material for manufacturing corrugated roofing sheets, trapezoidal (IBR) profiles, standing seam panels, rainwater gutters, downspouts, and lightweight steel framing components (non-structural).
– **HVAC:** Its ease of fabrication makes it the standard material for producing round and rectangular air conditioning ducts, ventilation components, and casings for HVAC units.
– **Appliances:** DX51D is used for the casings and non-structural panels of home appliances like washing machines, refrigerators, and small kitchen appliances.
– **General Fabrication:** It is used for making drums, barrels, simple stamped parts, steel furniture components, cable trays, and various sheet metal enclosures.
Why Choose Us for DX51D Galvanized Coil
Shandong Tanglu Metal Material Co., Ltd. is a specialist supplier of DX51D+Z galvanized steel coil. We maintain a large stock of this common grade from top-tier mills to ensure fast delivery. We understand the critical importance of consistent mechanical properties for forming operations, which is why every coil we supply comes with an original Mill Test Certificate (MTC) conforming to EN 10204 3.1. This certificate verifies the chemical composition, tensile strength, elongation, and zinc coating weight, guaranteeing that the material fully complies with the EN 10346 standard for DX51D. We offer a full range of thicknesses, widths, and zinc coatings to meet the precise needs of roll-formers, HVAC fabricators, and general manufacturers worldwide.
📐 Dimension & Size Table
| Thickness (mm) | Width (mm) | Zinc Coating (g/m²) | Coil Weight (T) |
|---|---|---|---|
| 0.12-0.25 | 600-1250 | Z60-Z120 | 3-5 |
| 0.25-0.50 | 600-1250 | Z80-Z180 | 3-8 |
| 0.50-0.80 | 700-1500 | Z80-Z275 | 5-10 |
| 0.80-1.50 | 700-1500 | Z100-Z275 | 5-12 |
| 1.50-4.00 | 1000-1500 | Z120-Z275 | 5-12 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.18 | ≤0.18 | per EN 10346 |
| Si | - | 0.50 | ≤0.50 | per EN 10346 |
| Mn | - | 1.20 | ≤1.20 | per EN 10346 |
| P | - | 0.12 | ≤0.12 | per EN 10346 |
| S | - | 0.045 | ≤0.045 | per EN 10346 |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (Re) | - | MPa | Not specified by EN 10346 standard |
| Tensile Strength (Rm) | 270 - 500 | MPa | Guaranteed range per EN 10346 |
| Elongation (A80) | ≥22 | % | Minimum value per EN 10346 |
| T-Bend Test | ≤2T | Typical value, indicates excellent formability |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Standard seaworthy export packing for galvanized steel coils. Coils are packed vertically (eye to sky), wrapped with waterproof paper and PE film, and then with a hardboard or steel outer protector. The package is secured with steel straps through the coil's eye and around its circumference. Edge protectors are used. Each coil is placed on a wooden pallet or steel skid and clearly tagged with all specification details. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit) |
| Price Term | FOB,CFR,CIF,EXW |
| Supply Capacity | 30,000 Tons/Month |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our DX51D Galvanized Steel Coil (GI Coil)?
Optimized for Cold Forming
DX51D grade is specifically designed for bending, profiling, and light drawing applications, with guaranteed mechanical properties for consistent and reliable formability.
EN 10346 Certified
Supplied with a Mill Test Certificate confirming full compliance with the European standard EN 10346 for chemical composition, mechanical properties, and coating.
Versatile General-Purpose Grade
The ideal and most cost-effective choice for a huge range of non-structural applications, including roofing, cladding, HVAC ductwork, and general sheet metal fabrication.
Wide Range of Zinc Coatings
Available with various zinc coating weights from Z80 to Z275, allowing you to balance cost with the required level of corrosion protection and service life for your project.
Global Standard Equivalence
Commercially equivalent to other major international standards like JIS G3302 SGCC and ASTM A653 CS Type B, making it a globally recognized and accepted grade.
🏭 Applications of DX51D Galvanized Steel Coil (GI Coil)
DX51D+Z galvanized steel coil is the workhorse of the sheet metal fabrication industry. Its excellent formability makes it the primary material for roll-forming into various roofing and cladding profiles used in residential, commercial, and agricultural construction. In the HVAC industry, it is easily fabricated into spiral and rectangular ducting. It is also stamped and bent to create enclosures, casings for home appliances, components for steel furniture, and a wide array of general-purpose sheet metal parts where structural strength is not the primary requirement.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ SGS Certified
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 Original Mill Certificate
❓ Frequently Asked Questions
What is DX51D galvanized steel?
DX51D is a European standard (EN 10346) grade for hot-dip galvanized steel coil. It is specifically designed for cold forming. The 'D' stands for 'Drawing/Forming', 'X' means the base steel is unspecified, '51' is a sequence number, and the final 'D' confirms it is for cold forming. The '+Z' signifies it has a hot-dip zinc coating.
Is DX51D a structural grade?
No, DX51D is a non-structural forming grade. It is not intended for applications where a specific minimum yield strength is required for load-bearing purposes. For structural applications, grades like S280GD, S320GD, or S350GD should be used.
What is the difference between DX51D, DX52D, and DX53D?
The difference is the level of formability. DX51D is for basic bending and profiling. DX52D is a drawing quality with better formability for moderately deep stamped parts. DX53D is a deep drawing quality, and DX54D is an extra-deep drawing quality for very complex parts. As formability increases, the cost also generally increases.
What is the equivalent of DX51D in other standards?
DX51D is a widely used grade with close commercial equivalents in other major standards. The most common equivalents are JIS G3302 SGCC (Japanese standard) and ASTM A653 CS Type B (American standard). While they are very similar, you should always check the specific standard requirements if a direct one-to-one certification is needed.
What is the best zinc coating for DX51D roofing sheets?
For general-purpose roofing in a mild environment, a Z140 (140 g/m²) coating is often sufficient. For higher quality, longer-lasting roofing, or for use in more humid or corrosive environments, a Z275 (275 g/m²) coating is highly recommended as it provides significantly more corrosion protection and a longer service life.
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DX51D Galvanized Steel Coil (GI Coil)
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