Name: DC51D+Z Galvanized Coil/Plate
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DC51D+Z Galvanized Coil/Plate

DC51D+Z is a galvanized steel product according to EN 10346 standard, featuring a zinc coating applied through the hot-dip galvanizing process. This material offers excellent corrosion resistance, good formability, and superior surface quality, making it suitable for various applications requiring both durability and aesthetic appeal.

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◉ PRODUCT SPECIFICATION

1. Material Standards & Designation

Primary Standard:

EN 10346 - Continuously hot-dip coated steel flat products

Designation Explanation:

DC51D: Steel grade designation (Formability level)
+Z: Hot-dip zinc coating
Equivalent to: DX51D+Z (European equivalent)

2. Chemical Composition (% by weight)

Element	Standard Requirement	Typical Value	Allowable Tolerance
Carbon (C)	≤ 0.12	0.08	+0.02%
Manganese (Mn)	≤ 0.60	0.35	+0.04%
Phosphorus (P)	≤ 0.045	0.020	+0.005%
Sulfur (S)	≤ 0.045	0.020	+0.005%
Silicon (Si)	-	-	+0.02%
Aluminum (Al)	≥ 0.020	0.035	+0.01%
Titanium (Ti)	-	-	+0.01%

3. Mechanical Properties

Property	Standard Requirement	Typical Value	Test Standard
Yield Strength (MPa)	140-300	180-250	EN ISO 6892-1
Tensile Strength (MPa)	270-420	300-380	EN ISO 6892-1
Elongation A80mm (%)	≥ 22	25-35	EN ISO 6892-1
Hardness (HRB)	45-65	50-60	EN ISO 6508-1
Bend Test	No cracking at 180°	Qualified	EN ISO 7438

4. Coating Specifications

Coating Class	Coating Mass (g/m²)	Coating Thickness (μm)	Typical Applications
Z100	100	7	General purpose
Z140	140	10	Better corrosion resistance
Z180	180	13	Good corrosion resistance
Z200	200	14	Enhanced protection
Z225	225	16	Superior corrosion resistance
Z275	275	20	Heavy duty applications

5. Physical Properties

Property	Typical Value	Test Standard
Density	7.85 g/cm³	EN 10001
Modulus of Elasticity	210 GPa	EN 10002-1
Poisson's Ratio	0.30	-
Thermal Expansion Coefficient	11.5 × 10⁻⁶/°C	EN 10002-5
Thermal Conductivity	50 W/m·K	EN 10025

6. Product Specifications

Parameter	Standard Range	Tolerance	Available Customization
Thickness	0.3mm - 3.0mm	±0.03-0.08mm	0.2mm - 4.0mm
Width	600mm - 1500mm	±1.0-2.0mm	500mm - 2000mm
Coil Weight	3-20 tons	±2%	1-25 tons
Coil ID	508mm/610mm	±5mm	400mm-800mm
Coil OD	1000mm-1800mm	±20mm	800mm-2000mm

7. Surface Treatment Options

Surface Finish	Coating Type	Characteristics	Applications
Normal Spangle	Regular zinc	Visible spangle pattern	General construction
Minimum Spangle	Treated zinc	Reduced spangle size	Painting substrate
Smooth Surface	Skin passed	Very smooth surface	Automotive, appliances
Chromated	Chromate passivation	Enhanced corrosion resistance	Electronics, outdoor
Phosphated	Phosphate coating	Improved paint adhesion	Automotive parts

8. Testing & Inspection

Mandatory Tests:

Tensile test (EN ISO 6892-1)
Bend test (EN ISO 7438)
Coating mass measurement (EN 10346)
Chemical analysis (EN 10204 2.2/3.1)
Surface inspection
Dimensional inspection

Optional Tests:

Salt spray test (EN ISO 9227)
Adhesion test (EN 13523-8)
Surface roughness measurement
Microstructure examination
Third-party inspection

9. Applications

Primary Applications:

Construction Industry: Roofing, wall panels, structural components
Automotive: Body panels, chassis components, interior parts
Home Appliances: Refrigerator cabinets, washing machine panels, air conditioner housings
Electrical Enclosures: Switch boxes, control cabinets, distribution boards
General Manufacturing: Storage racks, furniture, agricultural equipment

Processing Capabilities:

Stamping and forming
Welding (spot welding, arc welding)
Painting and coating
Roll forming
Cutting and punching

◉ Surfcae selection

SURFACE	CHARACTERISTIC	SUMMARY OF MANUFACTURING METHOD	APPLICATION
NO.1	Silvery white	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.1	lackluster	Hot rolled to specified thickness	Do not need to have a glossy surface use
NO.2D	Silvery white	After cold rolling, heat treatment and pickling are carried out	General material, deep material
NO.2B	Gloss is stronger than No.2D	After No.2D treatment, the final light cold rolling is carried out through the polishing roller	The general material
BA	As bright as a sixpence	No standard, but usually a bright annealed surface with high reflectivity.	Building materials, kitchen utensils
NO.3	Rough lapping	Grind with 100~200# (unit) strop tape	Building materials, kitchen utensils
NO.4	Intermediate grinding	Polished surface obtained by grinding with 150~180# strop abrasive tape	Building materials, kitchen utensils
NO.240	Fine lapping	Grinding with 240# strop abrasive tape	kitchenware
NO.320	Very fine grinding	Grinding was carried out with 320# strop abrasive tape	kitchenware
NO.400	The luster is close to BA	Use 400# polishing wheel to grind	General timber, building timber, kitchen appliances
HL	Hairline grinding	Suitable particle material for hair stripe grinding (150~240#) with many grains	Building, construction material
NO.7	It's close to mirror grinding	Use a 600# rotary polishing wheel to grind	For art or decoration
NO.8	Mirror ultrafinish	The mirror is ground with a polishing wheel	Reflector, for decoration