Hot-dip Galvanized Steel (DX51D+Z275) at CutWise

Galvanized Steel DX51D+Z275

Metals

DX51D+Z275 is a hot-dip galvanized mild steel grade that combines excellent formability with outstanding corrosion protection. The "Z275" coating designation means the steel is protected by a zinc coating with a total mass of 275 g/m², making it suitable for both indoor and outdoor applications where long-term durability is required. This material is widely used in construction, HVAC systems, automotive components, and general manufacturing.
DX51D+Z275 is manufactured according to EN 10346 and is one of the most commonly specified galvanized steels for sheet metal fabrication. It offers excellent bending and forming properties while maintaining a protective zinc layer that significantly extends the service life of the finished product.

Laser Cutting
Bending

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Properties of Galvanized Steel DX51D+Z275

Excellent corrosion resistance thanks to the Z275 zinc coating
Good cold forming and bending characteristics
Suitable for laser cutting and sheet metal processing
Long service life in indoor and outdoor environments
Good weldability with appropriate galvanized steel procedures
Economical alternative to stainless steel in many applications
Uniform zinc coating for consistent protection
Available in various sheet thicknesses
Manufactured according to EN 10346 quality standards

These properties make DX51D+Z275 one of the most popular galvanized steel grades for industrial sheet metal components where corrosion resistance and cost efficiency are important.

Datasheet Title

Technical properties of DX51D+Z275

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Product information and operations

Thickness	Dimensions	Laser cutting	Milling	Bending
1 mm	3000x1500 mm
1.5 mm	3000x1500 mm
2 mm	3000x1500 mm
3 mm	3000x1500 mm
4 mm	3000x1500 mm

Technical properties

General

Material designation DX51D+Z275

Standard EN 10346

Material type Hot-dip galvanized low carbon steel

Surface finish Zinc coated

Coating weight Z275 (275 g/m² total, both sides)

Density 7.85 g/cm³

Mechanical

Yield strength (Rp0.2) ≥ 140 MPa

Tensile strength (Rm) 270–500 MPa

Elongation (A80) ≥ 22%

Hardness Approx. 70–95 HRB

Electrical

Electrical conductivity Approx. 6–7 MS/m

Electrical resistivity Approx. 0.15 µΩ·m

Thermal

Thermal conductivity Approx. 50 W/m·K

Specific heat capacity Approx. 460 J/kg·K

Coefficient of thermal expansion 12 × 10⁻⁶ /K

Temperature Range

Recommended operating temperature -40°C to +200°C

Melting point Approx. 1,500°C

Applications of Galvanized Steel DX51D+Z275

HVAC ducts and ventilation systems

Electrical cabinets and enclosures

Construction panels and cladding

Machine guards and protective covers

Automotive body components

Agricultural machinery

Cable trays and mounting systems

Industrial brackets and fabricated sheet metal parts

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Frequently Asked Questions about Galvanized Steel DX51D+Z275

What does DX51D+Z275 mean?

DX51D is the steel grade according to EN 10346, designed for cold forming. Z275 indicates a total zinc coating weight of 275 g/m² applied to both sides of the steel, providing excellent corrosion protection.

Is DX51D+Z275 suitable for outdoor use?

Yes. The Z275 zinc coating offers very good corrosion resistance, making the material suitable for many outdoor applications. The actual lifespan depends on the environmental conditions and exposure.

Can DX51D+Z275 be laser cut?

Yes. DX51D+Z275 is well suited for laser cutting. Proper process settings help maintain clean cut edges while minimizing damage to the zinc coating.

Can galvanized steel be welded?

Yes. DX51D+Z275 can be welded using common welding methods. However, welding burns away the zinc coating at the weld area, so additional corrosion protection may be required after welding.

Is galvanized steel stronger than stainless steel?

Not necessarily. Galvanized steel provides excellent corrosion protection at a lower cost, while stainless steel generally offers superior corrosion resistance and often higher strength depending on the specific grade.

Can DX51D+Z275 be bent?

Yes. DX51D is specifically designed for cold forming and offers excellent bending performance, making it suitable for folded sheet metal components.

What is the difference between Z140 and Z275?

The difference is the thickness of the zinc coating. Z275 has nearly twice the zinc coating weight of Z140, providing significantly improved corrosion resistance and a longer service life.

Does laser cutting remove the zinc coating?

The zinc coating is removed only at the cut edge. The remaining surface retains its galvanized protection. If cut edges are exposed to aggressive environments, additional edge protection may be beneficial.