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Hot Dip Galvanized S250GD Steel Coil | 1.0242
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Hot-dip galvanized S250GD steel is a versatile and durable material. It is engineered to offer an ideal combination of strength and corrosion resistance, dependable for building structures, and is a durable option for exterior use.
SteelPro Group offers top-grade S250GD steel products customized to fulfill the varied requirements of our customers. Our products provide outstanding quality and reliability.
S250GD Hot-dip Galvanized Steel Description
S250GD is a structural grade of hot-dip galvanized steel. It is classified under the EN 10346:2015 standard and designated by material number 1.0242. The material offers excellent strength, formability, and corrosion resistance. It is frequently applied in exterior building surfaces, roofs, automotive components, and structural elements subjected to environmental pressures. Its excellent formability allows it to be easily processed into coils and strips, which can be welded and formed into different shapes for various applications.
Name Meaning Breakdown:
- S: Structural steel, indicating its suitability for use in structural applications.
- 250: Indicates the steel’s minimum yield strength, which is 250 MPa.
- GD: Galvanized refers to steel that has been coated with a zinc layer to improve its resistance to corrosion.
SteelPro Group offers S250GD in coil and strip forms. Our products support a range of metal coatings, including +Z, +ZF, +ZA, +ZM, +AZ, and +AS, allowing us to tailor the material to meet specific customer needs and enhance performance in various environments.
S250GD Galvanized Steel Coil Chemical Composition
| Element | Maximum Content (%) |
| Carbon (C) | 0.2 |
| Silicon (Si) | 0.6 |
| Manganese (Mn) | 1.7 |
| Phosphorus (P) | 0.1 |
| Sulfur (S) | 0.045 |
S250GD Galvanized Steel Coil Mecahmical Properties
| Property | Value |
| Tensile Strength (Rm) | ≥ 250 MPa |
| 0.2% Proof Strength (Rp0.2) | ≥ 330 MPa |
| Minimum Elongation (Lo = 80 mm) (A) | ≥ 19% |
The minimum elongation decreases with thickness:
- For 0.5 mm < t ≤ 0.7 mm, reduced by 2%
- For 0.35 mm < t ≤ 0.5 mm, reduced by 4%
- For t ≤ 0.35 mm, reduced by 7%
S250GD Galvanized Steel Applications
| Industry | Applications |
| Construction | Structural framing, roofing, cladding, wall panels, exterior facades, support beams |
| Automotive | Body panels, chassis, underbody parts, bumpers, doors, roof frames |
| Home Appliances | Washing machines, refrigerators, dishwashers, ovens, air conditioners, water heaters |
| Agriculture | Agricultural machinery, storage tanks, silos, farm equipment, fencing materials |
| Transportation | Railcars, trailers, truck beds, bus components, cargo containers |
| Manufacturing | Industrial shelving, workstations, factory equipment, structural components |
| Energy | Power transmission towers, electrical enclosures, wind turbine frames, solar panel structures |
S250GD Galvanized Steel Products Specifications
SteelPro Group supplies S250GD galvanized steel in both hot-rolled and cold-rolled states, available in coils and strips. We provide tailor-made sizes to suit your unique project demands and offer cutting services to ensure precise lengths for your specifications.
| Specification | Metric (mm) | Imperial (inch) |
| Thickness | 0.3 – 3.0 mm | 0.012 – 0.118 in |
| Width (Coils) | 600 – 1500 mm | 23.62 – 59.06 in |
| Width (Strips) | 20 – 600 mm | 0.79 – 23.62 in |
Surface Finish & Spangle Options
SteelPro Group provides a range of spangle finishes and surface treatments for S250GD galvanized steel, offering versatility for various applications.
Spangle Types:
Spangle refers to the crystalline structure that forms on the surface of galvanized steel. The spangle finish influences both the aesthetics and functional properties of the material:
| Spangle Type | Description |
| Normal Spangle | Traditional, large crystalline spangle with visible metallic sheen. |
| Skinpassed Spangle | A smooth, uniform spangle with reduced surface texture, offering a more polished appearance. |
| Minimized Spangle | A subtle spangle with minimal crystalline formation, ideal for more refined aesthetics. |
| Regular Spangle | Balanced spangle appearance with consistent texture, suitable for general use. |
Surface Treatments:
In addition to spangle options, we offer various surface treatments to enhance the material’s properties:
| Surface Treatment | Description |
| Chromate Passivation | A corrosion-resistant chromate passivation layer for enhanced durability and weather resistance. |
| Oiled | A light oil coating applied to prevent corrosion and maintain surface integrity during storage and handling. |
| Uncoated | No additional surface coating, ideal for applications where a natural galvanized finish is desired. |
S250GD Steel Coil & Strip Welding
Welding Galvanized S250GD Steel Challenges
- Zinc Coating Effects: Zinc vaporizes at high temperatures, producing fumes that can affect weld quality.
- Porosity Risks: Zinc fumes that are trapped during welding can form gaps or cavities in the weld if not carefully controlled.
- Weakened Corrosion Protection: The heat from welding burns off the zinc layer, leaving the steel exposed to potential rust.
Welding S250GD Steel Best Practices
- Choose the Right Welding Method:
- MIG/MAG (Metal Inert Gas/Metal Active Gas) Welding – Offers high efficiency and strong welds.
- TIG (Tungsten Inert Gas) Welding – Ideal for precision welding with minimal spatter.
- Resistance Welding – Suitable for thin galvanized sheets with minimal coating damage.
- Pre-Weld Preparation:
- Remove excess zinc near the weld area using grinding or mechanical removal.
- Ensure proper ventilation to minimize zinc fume exposure.
- Control Heat Input:
- Use moderate heat settings to prevent excessive zinc burn-off.
- Optimize welding speed to reduce heat-affected zone (HAZ) damage.
- Post-Weld Corrosion Protection:
- Apply zinc-rich primers or paints to restore corrosion resistance.
- Consider re-galvanization for critical structural applications.
SteelPro Group supplies high-quality S250GD galvanized steel, ensuring compatibility with various welding and fabrication processes for construction, manufacturing, and industrial applications.
High-quality S250GD Galvanized Steel Supplier
SteelPro Group is committed to providing high-quality S250GD galvanized steel solutions for industries such as construction, automotive, and manufacturing. We offer a range of spangle finishes, surface coatings, and tailored dimensions to suit the unique needs of your project.
In addition to S250GD, we also offer S350GD and S320GD grades, providing even higher tensile strength for demanding applications.
