Products Description
S250GD is available in the following hot dip coatings: S250GD+Z (galvanized), S250GD+ZF (galvanized-iron), S250GD+ZA (galvanized-aluminum), S250GD+AZ (aluminum-zinc), S250GD+AS (galvanized-iron) aluminum silicon).
In addition to carbon, S250GD also contains small amounts of manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), oxygen (O), nitrogen (N) and hydrogen (H), which are produced by It is brought into the ore and smelting process, so it is called impurity element.
DIN S250GD + Z DIN EN 10326 Chemical element
DIN S250GD + Z DIN EN 10326 in addition to carbon, steel also contains a small amount of manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), oxygen (O), nitrogen (N) and hydrogen (H). These elements are not intentionally added to improve the quality of steel, but are brought in by ore and smelting process, so they are called impurity elements. These impurities have a certain impact on the properties of steel. In order to ensure the quality of steel, the chemical composition of all kinds of steel is strictly stipulated in technical standards.
The main elements proportion is as below:
| Element | Min | Max | Similar |
|---|---|---|---|
| Si | - | 0.6000 | - |
| S | - | 0.0450 | - |
| P | - | 0.1000 | - |
| Mn | - | 1.7000 | - |
| C | - | 0.2000 | - |
S250GD Galvanized Steel Coating Types
Different coating types can meet various application scenarios. You can choose the appropriate coating according to your needs:
- +Z (zinc): suitable for protection needs in general environments, it is the most basic choice.
- +ZF (zinc-iron alloy): If the project requires welding construction, it is recommended to choose +ZF coating, which has better welding performance.
- +ZA (zinc-aluminum): used for structures exposed to harsh environments, such as outdoor buildings, with excellent anti-corrosion effect.
- +ZM (zinc-magnesium): For applications that require complex molding, +ZM coating can provide better formability.
- +AZ (aluminum-zinc): very suitable for architectural applications such as roofs, both anti-corrosion and anti-oxidation.
- +AS (aluminum silicon): suitable for use in high temperature environments, such as components of industrial heating equipment, with strong heat resistance.
Coating Range Forms of S250GD Steel
| Coating Form | Applicable Surface Structure | Weight Range of Coatings g/m² (A/B) |
| Equally Coating (Zinc Coating\Zn-Fe Alloy Coating) | Z, G, GX, N, R, S, O | 40/40~225/225 |
| Differential Coating b | N, R, S, O | 30~150 (each side) |
The galvanized coating on S250GD steel greatly enhances its corrosion resistance by forming a protective shield against moisture and environmental factors. This ensures durability and reliability across various applications. We take pride in using advanced surface treatments and coatings that further optimize S250GD's performance, making it the preferred choice for demanding projects across multiple industries.
How does the galvanization process enhance the performance of S250GD?
Our S250GD galvanized steel uses an advanced galvanizing process to form a uniform and strongly adherent zinc layer, which effectively improves corrosion resistance. Even if the surface is scratched, the zinc layer can provide excellent cathodic protection to prevent further corrosion of the steel, making it more durable and reliable in harsh environments.
Structural steels Mechanical properties
| Steel grade | Yield strength ReH or Rp0,2 transverse | Tensile strength Rm transverse | Fracture elongation A80 transverse* |
| MPa | MPa | % | |
| S220GD | ≥ 220 | ≥ 300 | ≥ 20 |
| S250GD | ≥ 250 | ≥ 330 | ≥ 19 |
| S280GD | ≥ 280 | ≥ 360 | ≥ 18 |
| S320GD | ≥ 320 | ≥ 390 | ≥ 17 |
| S350GD | ≥ 350 | ≥ 420 | ≥ 16 |
| S390GD | ≥ 390 | ≥ 460 | ≥ 16 |
| S420GD | ≥ 420 | ≥ 480 | ≥ 15 |
| S550GD | ≥ 550 | ≥ 560 | - |
1) range: 140 MPa (benchmark)
2) thickness ≥ 0,71 mm (≤ 0,70 minus two units)
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Surface finish
| Steel grade | NA | MA | MB | MC* |
| Thickness range | ||||
| mm | mm | mm | mm | |
| S220GD | 0.40 - 4.00 | 0.40 - 4.00 | 0.40 - 4.00 | 0.40 - 2.00 |
| S250GD | 0.40 - 4.00 | 0.40 - 4.00 | 0.40 - 4.00 | 0.40 - 2.00 |
| S280GD | 0.40* - 4.00 | 0.40* - 4.00 | 0.40* - 4.00 | 0.40* - 2.00 |
| S320GD | 0.50 - 4.00 | 0.50 - 4.00 | 0.50 - 4.00 | 0.50 - 2.00 |
| S350GD | 0.50 - 3.00 | 0.50 - 3.00 | 0.50 - 3.00 | 0.50 - 2.00 |
| S390GD | - | 0.50 - 2.50 | - | - |
| S420GD | - | 0.50 - 2.50 | - | - |
| S550GD | - | 2.00 - 3.00 | - | - |
* Lieferung nach Vereinbarung
Frequently Asked Questions (FAQ)
Q: What is the chemical composition of S250GD steel?
A: The chemical composition of S250GD steel typically includes carbon, manganese, phosphorus, sulfur, and a zinc coating. The specific composition balances strength, ductility, and corrosion resistance.
Q: What is the minimum yield strength of S250GD steel?
A: The minimum yield strength of S250GD steel is 250 MPa. This property ensures the steel can withstand significant stress and strain without deforming, making it a reliable choice for structural applications.
Q: How is the thickness of the steel sheet relevant to its application?
A: The thickness of the steel sheet affects its strength, weight, and flexibility. Thicker sheets offer more strength and are used in heavy-duty applications, while thinner sheets are lighter and used in applications where weight is a concern, such as automotive parts.
Q: Can S250GD steel be welded?
A: Yes, S250GD steel can be welded. However, appropriate welding techniques are important to maintain the integrity of the galvanized coating and prevent corrosion at the weld joints.
Q: What standards govern the production of S250GD galvanized steel?
A: The production of S250GD galvanized steel is governed by ASTM and EN standards, which ensure consistent quality, thickness, and properties across different batches and manufacturers.
