DX51D Steel

DX51 steel is a low-carbon cold-forming steel defined by the European standard EN 10346, ranking among the world’s most widely used premium substrate materials. Its core characteristics include stable performance, strong processing adaptability, and high cost-effectiveness.

Wanzhi Steel, with 14 years of steel production and export experience, operates specialized coated metal production lines. We not only supply premium DX51D steel but also produce galvanized steel (GI), galvanized-aluminum steel (GL), zinc-aluminum-magnesium steel (ZAM), and color-coated steel using DX51D as the substrate. We have become a trusted substrate supplier for coated steel manufacturers.

DX51D Steel Specification

Item	DX51D Steel (Coil/Sheet/Strip optional)
Place of Origin	Shandong, China
Thickness	0.12mm-6.0mm
Width	20-1500mm (can be slit)
Length	1-6m (customizable), rolls are cut according to roll weight.
Tolerance	Thickness tolerance: +/-0.02mm，Width tolerance: -0/+3mm
Standard	EN 10346
Surface Treatment	Chromated/non-Chromated, Oiled/Non-oiled, Passivation
Processing Service	Punching, Cutting, Slitting, Decoiling
MOQ	25 tons
Payment term	TT 30% Advance + 70% Balance
Sample	Free Available
Price Item	FOB, CIF, EXW, etc
Packing	Standard Sea-worthy Packing
Certification	ISO 9001, SGS, CE
Delivery Time	7 – 30 days

Production Video

Basic Definition

DX51D is a common low-carbon galvanized steel sheet, which belongs to the hot-dip galvanized steel (GI) grade defined in the European standard EN 10346. It is mainly used in the fields of construction, home appliances, and light industry. Its name means:

• D: Stands for cold forming steel (Ductile).
• X: Indicates that the base material is low-carbon steel.
• 51: Indicates the material grade (standard strength level).
• D: Indicates that the coating type is pure zinc (Zinc Coating).
• +Z: Zinc layer marking, indicating the total weight of the double-sided zinc layer, unit g/m².

For example, DX51D+Z275 means continuous hot-dip galvanizing of flat profiles, and the unit weight of the zinc layer is 275g/㎡.

DX51D Steel Chemical Composition

C%	Si%	Mn%	P%	S%	Alt%
≤ 0.07	≤ 0.03	≤ 0.50	≤ 0.025	≤ 0.025	≥ 0.020

Mechanical properties of DX51D steel

Nominal gauge, mm	Minimum yield strength, ReH	Minimum elongation ratio
0.57-2.00	270-500MPa	22 %

DX51D Steel Equivalent Material

Standards System	Equivalent or Approximate Grades
European Standard (EN)	DX51D (EN 10346)
American Standard (ASTM)	A653 CS Type B (ASTM A653)
Japanese Standard (JIS)	SGCC (JIS G 3302)
Chinese Standard (GB)	DX51D (GB/T 2518)
International Standard (ISO)	DX51D (ISO 3575)
German Standard (DIN)	DC01, DC04 (DIN EN 10130)
British Standard (BS)	S250GD (BS EN 10327)
Chinese Standard (GB)	Q195-Q235 (GB/T 2518-2019)

Compared With DX52D, DX53D, and DX54D

DX51D, DX52D, DX53D, and DX54D are all galvanized steel sheets for cold forming. Their main difference lies in their different mechanical properties, which leads to different uses.

• DX51D: The yield strength is not clearly specified, the tensile strength is 270-500MPa, and the minimum elongation after fracture is 22%. It belongs to the ordinary commodity level and is one of the most commonly used galvanized steel sheets with certain strength and corrosion resistance.
• DX52D: The yield strength is 140-300MPa, the tensile strength is 270-420MPa, and the minimum elongation after fracture is 26%. Compared with DX51D, it has lower strength but better ductility. It belongs to stamping grade steel and can be used for some simple stamping processes.
• DX53D: The yield strength is 140-260MPa, the tensile strength is 270-380MPa, and the minimum elongation after fracture is 30%. It has good ductility and formability, and is mainly used to manufacture deep stamping parts.
• DX54D: Yield strength is 120- 220MPa, tensile strength is 260-350MPa, minimum elongation after fracture is 36%, minimum r90 value is 1.6, and minimum n90 value is 0.18. Its strength is relatively low, but its plasticity and toughness are very good, and it has excellent deep drawing performance and anti-strain aging performance.

Advantages of DX51D Steel

With low carbon and low impurity content at its core, DX51D steel offers the following advantages for this grade:

• Superior weldability: Low carbon and phosphorus/sulfur content significantly reduce the risk of brittleness and cracking in the weld heat-affected zone, ensuring robust and reliable welded joints.
• Stable Formability: The pure steel matrix ensures consistent microstructural response during deformation, preventing unexpected cracking caused by segregation or inclusions.
• Balanced Mechanical Properties: Its tensile strength (270-500 MPa) and yield strength range, combined with a minimum elongation of 22%, deliver both high strength and sufficient ductility.
• Wide Process Compatibility: Capable of receiving various coatings including zinc (GI), aluminum-zinc (GL), and zinc-aluminum-magnesium (ZAM), while also serving as a substrate for pre-painted (PPGI/PPGL) and laminated coatings.

Uses of DX51D Steel

The primary application of DX51D steel is as a substrate for high-performance metal-coated steel.

Surface Treatment Path (Substrate → Treatment)	Application Areas	Typical Application Scenarios
DX51D → Aluminized Zinc Plating (AZ) / High Zinc Layer Zinc Plating (Z275) → (Color Coating)	Building Envelope	Industrial plant roofs/walls
High Surface Quality DX51D → Zinc Plating → High-Quality Color Coating (PPGI)	Home Appliances	Refrigerator and air conditioner casings
DX51D → Zinc Plating, Spraying, or Lamination as Needed	General Manufacturing	Industrial cabinets and shelves
DX51D → Zinc Plating / Thick Zinc Layer Zinc Plating (Z275+)	Transportation	Automotive interior structural components, highway guardrails
DX51D → Corrosion-Resistant Coating (e.g., Zinc-Aluminum-Magnesium ZM)	Agricultural and Livestock Facilities	Grain silos and greenhouse structures

Recommended Selection

• Choose DX51D: Construction, home appliances, and general use.
• Choose DX52D: Auto parts, complex stamping parts.
• Choose DX53D: Precision hardware, high-end home appliances.
• Choose DX54D: High-end automotive panels, electronic housings.

What types of steel can DX51D serve as a substrate for?

1. Hot-dip Metal Coated Steel

• Hot-dip galvanized steel: DX51D+Z (e.g., Z120, Z180, Z275), where the zinc coating provides corrosion protection for the substrate steel.
• Aluminum-zinc coated steel: DX51D+AZ (e.g., AZ100, AZ150). The 55% aluminum-zinc coating offers outstanding corrosion resistance, heat resistance, and thermal reflectivity.
• Zinc-Aluminum-Magnesium Steel: DX51D+ZM (e.g., ZM120). Magnesium added to the zinc-aluminum base delivers exceptional corrosion resistance, scratch resistance, and edge protection.

2. Color-Coated Steel

• Color-coated steel is a high-value-added product created by applying a coating to the aforementioned metal-coated sheets (GI, GL).
• Production Process: DX51D substrate → Hot-dip galvanizing (GI) or aluminum-zinc coating (GL) → Chemical conversion treatment → Primer/topcoat application → Baking and curing.

3. Laminated Metal Coil

• Process: Prefabricated polymer decorative films (e.g., PVC, PET) are bonded to DX51D substrate (typically galvanized steel) via high-temperature, high-pressure lamination with adhesive.
• Effect: Directly achieves complex decorative finishes like wood grain, stone texture, solid colors (glossy/matte), plus features such as fingerprint resistance, scratch resistance, and antibacterial properties.

FAQ

Q: Can DX51D replace stainless steel?

A: It can be used for short-term corrosion protection (such as dry environment), but it is recommended to use stainless steel or higher zinc layer (such as DX53D+AZ150, galvanized zinc) in high corrosion environment (chemical plant, coastal area).

Q: What is the difference between DX51D and SGCC?

A: SGCC is a Japanese standard (JIS G 3302) and can be used as an equivalent material for DX51D. The performance is similar, but DX51D is more universal (mainstream in European/Chinese markets).

Q: How to judge the quality of the zinc layer?

A: It can be tested by ① salt spray test, ② zinc layer thickness gauge,e ③ observation of surface uniformity (no leakage, zinc slag).

Q: What is DX51D AZ150 material?

A: Dx51d AZ150 is a hot-dip aluminum-zinc steel alloy with a coating of 55 percent aluminum, 1.6 percent silicon, and 43.4 percent zinc. The chemical composition of Dx51d AZ150 offers superior resistance to heat and corrosion, with high thermal reflectivity and conductivity.

DX51D Steel Coil and Sheet package

Where to buy DX51D Steel- Wanzhi Steel, A Trusted Manufacturer

Wanzhi Steel is one of China’s leading steel producers. We operate a manufacturing facility in Shandong Province specializing in galvanized steel coils, GL steel coils, hot-rolled steel coils, color-coated steel coils, and other products. With decades of export experience, Wanzhi Steel has served clients in France, Turkey, the Philippines, Brazil, Argentina, and beyond. Leveraging our extensive expertise, we will assist you in selecting the right materials for your project. For the latest pricing information, contact us immediately. We will respond within 10 hours.