S220GD+ZM Zinc-Aluminum-Magnesium Coated Steel Coil is a structural steel product manufactured according to EN 10346, combining a structural steel substrate with a zinc-aluminum-magnesium (+ZM) metallic coating. With a minimum specified yield strength of 220 MPa, S220GD+ZM provides a practical balance of strength, formability and corrosion protection for outdoor structural and roll-formed applications.
The ZM coating is designed to provide enhanced corrosion protection compared with conventional zinc-coated steel in many demanding environments. S220GD+ZM is particularly suitable for structural components, solar mounting systems, purlins, profiles and other fabricated steel products where long-term corrosion resistance and reliable forming performance are required.
S220GD+ZM Steel Coil
S220GD+ZM is a structural steel grade with a zinc-aluminum-magnesium alloy coating. Under the EN 10346 designation system, "S" indicates structural steel, "220" corresponds to the minimum specified yield strength of 220 MPa, "GD" identifies a continuously hot-dip coated flat product for structural applications, and "+ZM" identifies the zinc-aluminum-magnesium metallic coating.
Compared with conventional galvanized steel, the addition of aluminum and magnesium to the metallic coating can improve the corrosion protection mechanism of the coating. The resulting protective products can help reduce corrosion progression, particularly around processed areas such as cut edges and punched holes.
For buyers looking for a structural coated steel coil for roll forming, fabrication and outdoor applications, S220GD+ZM offers a useful combination of structural strength, processability and corrosion protection.
S220GD+ZM Steel Coil Specifications
| Item | Specification |
|---|---|
| Product Name | S220GD+ZM Zinc-Aluminum-Magnesium Coated Steel Coil |
| Steel Grade | S220GD+ZM |
| Standard | EN 10346 |
| Steel Type | Structural Steel |
| Coating Type | Zinc-Aluminum-Magnesium (+ZM) |
| Minimum Yield Strength | ≥ 220 MPa |
| Minimum Tensile Strength | ≥ 300 MPa |
| Elongation A80 | ≥ 20% for applicable thickness ranges under EN 10346 |
| Thickness | Available according to production capability and customer requirements |
| Width | Available according to production capability and customer requirements |
| Coating Mass | Available ZM coating grades according to production requirements |
| Surface | Available surface finishes according to customer requirements |
| Coil Weight | Customized according to order requirements |
| Edge | Mill edge or slit edge according to requirements |
| Packaging | Standard export seaworthy packaging |
| Delivery | According to order quantity, specifications and production schedule |
Note: Actual thickness, width, coating mass, coil weight and surface options depend on the production route and order requirements. GNEE STEEL can confirm the available specification range and corresponding MTC before order placement.
Mechanical Properties of S220GD+ZM
S220GD+ZM is designed as a structural steel grade under EN 10346. The grade provides a minimum yield strength of 220 MPa and a minimum tensile strength of 300 MPa. The specified elongation varies with product thickness.
| Mechanical Property | EN 10346 Requirement |
|---|---|
| Yield Strength Re / Rp0.2 | ≥ 220 MPa |
| Tensile Strength Rm | ≥ 300 MPa |
| Elongation A80, 0.45–0.50 mm | ≥ 16% |
| Elongation A80, 0.50–0.70 mm | ≥ 18% |
| Elongation A80, 0.70 mm and above | ≥ 20% |
The mechanical properties above should be understood together with the applicable product thickness and testing requirements of EN 10346. For a specific purchase order, GNEE STEEL can provide the applicable material certificate and confirmed mechanical properties.
S220GD+ZM Applications
S220GD+ZM Zinc-Aluminum-Magnesium Coated Steel Coil can be used in a wide range of structural and fabricated steel applications, depending on engineering requirements and environmental conditions.
- 1.Solar Mounting Systems: Rails, channels, purlins and other PV support components.
Solar mounting rails
C-channel profiles
Structural purlins
Solar support profiles
Ground-mounted PV structures
Commercial and industrial rooftop structures
Other cold-formed photovoltaic components
- 2.Construction: Cold-formed structural profiles, purlins and building components.
- 3.Industrial Structures: Structural profiles and fabricated components requiring corrosion protection.
- 4.Agricultural Structures: Selected outdoor structural components and frames.
- 5.Infrastructure: Structural and fabricated steel components exposed to outdoor environments.
- 6.Steel Fabrication: Roll-formed, cut and processed components manufactured according to project requirements.
Quality Control for S220GD+ZM Steel Coil
For international B2B orders, material consistency and documentation are important. GNEE STEEL can arrange inspection and material documentation according to the confirmed purchase specification.
- Steel grade verification
- Thickness and width inspection
- Coating mass inspection
- Surface quality inspection
- Mechanical property testing
- Coil weight verification
- Mill Test Certificate (MTC)
- Export packaging inspection
Frequently Asked Questions About S220GD+ZM
What does the 220 mean in S220GD+ZM?
The number 220 refers to the minimum specified yield strength of 220 MPa under the applicable EN 10346 requirements.
Is S220GD+ZM suitable for solar mounting systems?
Yes. S220GD+ZM can be considered for solar mounting components such as rails, channels and purlins when its structural properties, coating specification and corrosion resistance meet the engineering requirements of the project.
What standard does S220GD+ZM follow?
S220GD+ZM is specified under EN 10346 for continuously hot-dip coated steel flat products.
What is the yield strength of S220GD+ZM?
The minimum specified yield strength of S220GD+ZM is 220 MPa under EN 10346.
Can S220GD+ZM be roll formed?
Yes. S220GD+ZM is a structural coated steel grade suitable for forming applications when the forming process, tooling and material thickness are properly matched.
Can you provide customized S220GD+ZM steel coils?
GNEE STEEL can discuss customized thickness, width, coating mass, coil weight and processing requirements according to production capability and project requirements. Please send your required specification for confirmation.
Can you provide an MTC for S220GD+ZM?
Yes. Material documentation such as a Mill Test Certificate can be provided according to the confirmed order specification and testing requirements.
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