The Specification of DX51D+Z galvanized steel sheet

DX51D+Z galvanized steel is one of the most widely specified grades for hot-dip galvanized steel, particularly suited for cold forming applications. The DX51D grade is defined as "Bending and Profiling Quality", emphasizing excellent ductility and formability rather than high strength.

 

 

The '+Z' indicates a pure zinc coating, providing reliable corrosion protection for long-term use. Its combination of cost-effectiveness, consistent formability, and corrosion resistance makes DX51D+Z a versatile choice across multiple industries.

 

 

Consistent Quality – Full in-house production control with the majority of raw materials sourced from Baosteel. Every batch is tested to ensure mechanical property compliance and precise thickness/width tolerances.

 

Export Specialists – With 10+ years of experience serving overseas manufacturers, we manage compliance, documentation, and shipping efficiently, providing a proven track record of successful exports.

 

Convenient Supply – Flexible order quantities, ranging from small batches to large volumes, with multiple shipping options (LCL, FCL, Bulk Carrier). Dedicated after-sales support and regular customer visits ensure smooth operations.

 

Low Minimum Order & Sample Availability – Orders starting from 0.5–5 tons. Samples are available for evaluation, allowing you to verify quality before bulk purchase.

 

 

Parameter	Specification
Grade	DX51D+Z
Certificate	IATF 16949:2016, ISO 45001, ISO 9001, ISO 14001
Standard	GB/T, EN, JIS, ASTM
Technique	Cold Rolled
Thickness (mm)	0.15–6.00 (customized)
Width (mm)	10–1500 (slitting service available)
Coil ID (mm)	508 / 610
Spangle	Zero, Small, Regular, Large
MOQ	0.5 Ton
Delivery Time	2–4 weeks (negotiable)
Package	Standard / Deluxe / Export Packages

 

 

Grade	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Ti (%)
DX51D+Z	≤ 0.18	≤ 0.5	≤ 1.2	≤ 0.12	≤ 0.045	≤ 0.3
DX52D+Z	≤ 0.12	≤ 0.5	≤ 0.6	≤ 0.10	≤ 0.045	≤ 0.3
DX53D+Z	≤ 0.12	≤ 0.5	≤ 0.6	≤ 0.10	≤ 0.045	≤ 0.3
DX54D+Z	≤ 0.12	≤ 0.5	≤ 0.6	≤ 0.10	≤ 0.045	≤ 0.3
DX56D+Z	≤ 0.12	≤ 0.5	≤ 0.6	≤ 0.10	≤ 0.045	≤ 0.3

 

Mechanical Properties

Grade	Tensile Strength (N/mm²)	Yield Strength (N/mm²)	Elongation (%)	Hardness (Hv0.5)
DX51D	No requirement	270–500	≥ 22	100–125
DX52D	140–300	260–420	≥ 26	105–130
DX53D	140–260	260–380	≥ 30	115–140
DX54D	120–220	260–350	≥ 36	140–165
DX56D	120–180	260–330	≥ 39	140–165

 

 

Zero Spangle – Smooth, modern surface

Small Spangle – Subtle pattern for decorative uses

Regular Spangle – Standard galvanization pattern

Large Spangle – Classic textured appearance

 

 

GB/T 2518	EN 10346	JIS G3302	ASTM A653M
DX51D+Z	DX51D+Z	SGCC	CS Type C

 

 

DX51D+Z galvanized steel is widely used due to its formability, corrosion resistance, and cost-effectiveness:

Construction & Building: Roofing, wall panels, gutters, downspouts, and non-structural steel framing.

Home Appliances: Refrigerator side panels, washing machine casings, air-conditioner outdoor units, water heater shells.

General Manufacturing & Hardware: Brackets, toolboxes, agricultural equipment parts, and other fabricated components.

If you are unsure which grade is best for your application or need technical guidance, our engineering team is ready to assist. We can provide material suggestions, samples, and customized solutions tailored to your project requirements.

 

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Q1: What is DX51D+Z steel?
DX51D+Z is a continuously hot-dip galvanized cold-rolled low carbon steel grade according to EN 10346. "DX51D" indicates the base steel with standard ductility, and "+Z" denotes a zinc coating on both sides for corrosion protection.

 

Q2: Which standard governs DX51D+Z steel?
DX51D+Z is produced under EN 10346, which specifies requirements for continuously hot-dip coated flat steel, including chemical composition, mechanical properties, zinc coating mass, surface quality, and dimensional tolerances.

 

Q3: What are the typical mechanical properties of DX51D+Z?
DX51D+Z usually has a tensile strength of approximately 270–410 MPa, a yield strength of around 140–280 MPa, and a minimum elongation of 23% (A80). These properties allow basic forming, bending, and light stamping.

 

Q4: How does DX51D+Z differ from DX53D+Z and DX54D+Z?
DX51D+Z has lower strength and elongation than DX53D+Z or DX54D+Z, making it suitable for general purpose applications where extreme forming or deep drawing is not required.

 

Q5: What does the "+Z" designation mean?
The "+Z" indicates a continuous hot-dip zinc coating applied on both sides of the steel. This sacrificial layer provides corrosion protection, extending the lifespan of the material in mild atmospheric conditions.

 

Q6: What zinc coating weights are available for DX51D+Z?
Typical zinc coating weights are Z10, Z15, Z20, Z25, and Z30, representing total zinc mass on both sides in g/m². Higher zinc weights offer better corrosion resistance but may slightly reduce formability.

 

Q7: Is DX51D+Z weldable?
Yes, DX51D+Z can be welded with standard resistance or arc welding methods. However, localized zinc evaporation occurs during welding, so ventilation and proper process control are recommended.

 

Q8: Can DX51D+Z be formed or bent?
DX51D+Z is suitable for general forming, bending, and light stamping operations. It is less suitable for deep drawing or complex shapes compared to DX53D+Z or DX54D+Z due to its lower elongation.

 

Q9: What are the surface quality requirements for DX51D+Z?
The surface should be free of major defects such as cracks, heavy zinc runs, blistering, or rust. Minor imperfections that do not affect processing or end-use performance are acceptable per EN 10346.

 

Q10: What are common applications of DX51D+Z steel?
DX51D+Z is widely used in automotive components with minimal forming requirements, appliance panels, light construction elements, roofing sheets, ducts, and general corrosion-protected flat steel applications.