What is S250GD | 1.0242?
S250GD (1.0242) is a structural steel grade under EN 10346, mainly used for galvanized steel. "S" denotes structural steel, "250" indicates the minimum yield strength in MPa, and "GD" signifies its suitability for galvanization. It contains carbon, manganese, and silicon, with stringent limits on sulfur and phosphorus. Common methods include hot-dip and electro-galvanizing, producing galvanized sheets or coils for construction, appliances, and automotive industries.
DIN S250GD + Z DIN EN 10326 Physical properties
The DIN S250GD + Z DIN EN 10326 material physical properties shall comply with the values given in the following table.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 42 | - | - | 0.14 | - | |||
| 499 | 398 | - | 24.3 | 421 | - | ||
| 341 | - | 11 | 21.2 | 434 | 221 |
Structural steel Properties according to DIN EN 10 326
Steel type
| Short designation | Surface finish | Material number |
| S250GD | +Z,+ZF,+ZA,+ZM,+AZ,+AS | 1.0242 |
S250GD | 1.0242: Mechanical properties (longitudinal)
| Proof stress Rp0,21) MPa min. | Tensile strength Rm2) MPa min. |
Elongation at fracture A803) % min. |
| 250 | 330 | 19 |
S250GD | 1.0242: Chemical composition (heat analysis)
| Percentage by weight % max. | ||||
| C | Si | Mn | P | S |
| 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
S250GD Steel Equivalent Grade
| Standard | Equivalent Grade |
| BS | FeE250G |
| ASTM | Grade B (ASTM A 466 M) |
| GB | Q235 |
| JIS | SGC340 |
S250GD Galvanized Steel Advantages
Our S250GD galvanized steel excels in strength, durability and processability, helping customers easily meet various needs in the construction and manufacturing fields with high performance and cost-effectiveness:
- High strength and good stability: S250GD guarantees a yield strength of at least 250 MPa, which can maintain structural stability under high loads, while many similar products are slightly lacking in strength.
- Excellent ductility and suitable for forming: S250GD has a higher elongation after fracture than ordinary steel on the market, and is not easy to crack during the forming process, making it very suitable for complex processing.
- Excellent corrosion resistance: We have optimized the galvanizing process to ensure that the steel can be used for a long time in humid or highly polluted environments, reducing corrosion losses, while other products have a relatively short service life in these environments.
- Good weldability and more convenient construction: It can be easily welded without preheating, saving construction time and cost, while other materials usually require more processes.
- Environmentally sustainable: S250GD has a high recycling rate and meets green manufacturing standards, making it an ideal choice for environmentally friendly projects.
Frequently Asked Questions (FAQ)
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.
Q: How does the adhesion of the zinc coating affect the performance of galvanized steel coils?
A: The zinc coating's adhesion is crucial for the performance of galvanized steel coils. Good adhesion ensures that the coating remains intact, providing adequate corrosion protection and extending the lifespan of the steel products.
Q: What are the advantages of using hot-rolled galvanized steel?
A: Hot rolled galvanized steel offers several advantages, including improved surface finish, enhanced strength and durability, and resistance to rust and corrosion. It is ideal for applications in harsh environments and where high load-bearing capacity is required.
