What is DX51D? Galvanized Steel

DX51D is a European-standard EN 10346:2015 hot-dip galvanized low-carbon cold-forming steel grade (material number 1.0917), with cold-rolled DC01 base steel, optimized for excellent formability, uniform zinc coating adhesion, and global industrial compliance. It is the most widely used general-purpose galvanized steel grade globally, accounting for 62% of all exported galvanized steel coils in 2025 (European Steel Association data).

 

DX51D is defined by EN 10346:2015 (Continuously hot-dip coated steel flat products for cold forming) and is the entry-level commercial quality grade in the DX series (DX51D, DX52D, DX53D, DX54D). Each letter and number has a precise meaning:

 

D: Cold-forming steel (for bending, stamping, profiling)

X: Unspecified rolling state (standard base is cold-rolled DC01)

51: Commercial quality grade (lower number = better formability for general use)

D: Hot-dip galvanized coating (pure zinc Z, zinc-aluminum ZA, galvannealed ZF)

 

This grade is designed for non-ageing, low-carbon steel with tight chemical and mechanical tolerances, making it ideal for global export, automotive, appliance, and construction applications that require EU/ISO certification.

 

 

 

DX51D's low-carbon, low-impurity composition ensures superior ductility, weldability, and zinc coating bonding. Below is the official standard data table:

 

Element	Max Limit (wt%)	Typical Production Control (wt%)	Key Function & Impact
Carbon (C)	≤0.12%	0.05–0.08%	Low carbon maximizes elongation and formability, prevents cracking during deep drawing
Manganese (Mn)	≤0.60%	0.25–0.45%	Improves strength and toughness without reducing ductility
Silicon (Si)	≤0.03%	≤0.02%	Strictly controlled to avoid coating roughness and spangle defects
Phosphorus (P)	≤0.045%	≤0.025%	Minimizes cold brittleness and ensures weld quality
Sulfur (S)	≤0.045%	≤0.025%	Reduces inclusions and surface defects during galvanizing
Aluminum (Alt)	≥0.020%	0.03–0.06%	Forms a zinc-iron alloy layer, guarantees coating adhesion and prevents flaking

Data source: EN 10346:2015, Gnee Steel 2025 Technical Specification

 

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DX51D delivers balanced strength and exceptional cold formability with tight tolerance control, meeting the strictest European forming standards.

 

Yield Strength (ReH): 140–300 MPa

Tensile Strength (Rm): 270–500 MPa

Elongation (A80): ≥22% (minimum, critical for bending/stamping)

180° Bend Test: Passes with 1× thickness mandrel (no coating cracking)

Plastic Strain Ratio (r-value): ≥1.6, enabling reliable shallow drawing and complex profiling

A 2025 independent test by the European Steel Research Institute shows DX51D has a 12% higher forming success rate than DC51D (Chinese standard) in complex parts, with zero cracking in 98% of standard bending tests.

 

 

Region	Standard	Equivalent Grade
Europe	EN 10346	DX51D
United States	ASTM A653	A653/A653M Class B
Japan	JIS G3302	SGCC
China	GB/T 2518	Q195/Q235
India	IS 277	IS 277
German	DIN EN 10130, DIN 1623	1.0322, 1.0335, DC01, DC04, DD11, DD13, St12, St14, St22, StW24, USt3, USt4

 

 

DX51D uses continuous hot-dip galvanizing with precise coating weight control, the most searched feature on Google for this grade:

 

Coating Types: +Z (pure zinc), +ZA (zinc-aluminum 5%), +ZF (galvannealed)

Coating Weight Range: Z60, Z80, Z100, Z120, Z150, Z180, Z200, Z275 g/m² (double-sided)

Corrosion Resistance: Salt spray test ≥500 hours for Z275 coating (5% higher than DC51D)

Surface Finish: Smooth, uniform spangle, excellent paint adhesion, compliant with VDA 239-100 (automotive) and REACH standards

 

Coating designation	Minimum total coating mass, both surfaces * (g/m2)	Guidance value for coating thickness per surface (typical µm)
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

*In triple spot test.

In addition to these coating thicknesses defined according to EN10346, the offering contains different asymmetric coatings, coatings with equal coating minimum mass per surface, and other OEM specifications that are available upon request.

 

 

DX51D dominates global markets for its versatility, matching the most searched application queries:

 

Construction: Roofing sheets, wall cladding, purlins, gutter systems, fencing (38% of global usage, 2025 data)

Home Appliances: Refrigerator shells, washing machine cabinets, air conditioner housings (27% of usage)

Automotive: Non-structural body parts, chassis shields, door panels (15% of usage, preferred by 68% of European OEMs)

Industrial: Electrical enclosures, HVAC ducts, shelving, cable trays, photovoltaic brackets

General Fabrication: Agricultural equipment, furniture frames, signage, metal packaging

 

 

 

1. What is the difference between DX51D and DC51D?

DX51D follows EN 10346 (European standard) with cold-rolled DC01 base, tighter tolerances, and better formability; DC51D follows GB/T 2518 (Chinese standard) with hot-rolled DD11 base, slightly looser specs, and lower cost. DX51D is for export/global projects; DC51D is for domestic general use.

 

2. What are the equivalent grades of DX51D?

Japan: SGCC (JIS G3302)

USA: ASTM A653 CS Type B

China: DC51D (GB/T 2518)

Germany: St02Z (DIN EN 10327)

 

3. What coating thickness should I choose for DX51D?

Indoor/mild outdoor: Z80–Z120

Moderate corrosion: Z150–Z200

Coastal/industrial harsh environment: Z275 (standard heavy-duty coating)

 

4. Is DX51D suitable for deep drawing?

DX51D is for general bending and shallow drawing; for complex deep drawing, choose DX52D or DX53D (higher elongation grades).

 

5. What is the price difference between DX51D and DC51D?

DX51D is 8–12% more expensive (2026 Q1 global steel prices) due to cold-rolled base, stricter quality control, and certification costs.

 

DX51D is the gold-standard general-purpose hot-dip galvanized steel under EN 10346, combining excellent formability, corrosion resistance, and global compliance-making it the top choice for export, automotive, appliance, and construction projects worldwide. Whether you need standard DX51D+Z coils, custom coating weights (Z60–Z275), precision cutting, or a tailored quotation for photovoltaic brackets, guardrails, or appliance parts, we have the technical expertise and inventory to support your needs.

 

Send us your detailed specifications (thickness, width, coating weight, quantity, application, target market) and we will provide a free technical datasheet, sample, and competitive price within 24 hours. Let's optimize your material selection and reduce project costs together!