S250GD galvanized steel
S250GD galvanized steel is a structural hot-dipped galvanized steel with a minimum yield strength of 250 MPa. Zinc thicknesses are usually selected according to the application requirements and include galvanized coils, sheets, roofing sheets, appliance housings and customized tubes and pipes, to name a few. GNEE STEEL supplies various types of hot dip galvanized steel in accordance with EN 10346, ASTM A653 and JIS G3302 standards, welcome to contact us for your steel price.
Mechanical Properties
| Parameter | Standard Requirement | Typical Value |
| Yield Strength (Rp0.2) | ≥250 MPa | 270-310 MPa |
| Tensile Strength (Rm) | 370-460 MPa | 390-440 MPa |
| Elongation (A80mm) | ≥12% | 16-20% |
| Bendability | 180° d=0a | No cracking |
Global Standard Grade Comparison
| Property | Europe EN 10346 | China GB/T 2518 | USA ASTM A653 | Japan JIS G3302 |
| Grade | S250GD+Z | S250GD+Z | SS Grade 40 | SGHC390 |
| Yield Strength | ≥250 MPa | ≥250 MPa | ≥275 MPa | ≥390 MPa |
Advantages
Enhanced Load Capacity: 250MPa yield strength supports heavier structural loads vs. S220GD.
Corrosion Resistance: Zinc coating (Z20-Z350) of GI steel protects in humid/industrial environments.
Formability: Retains excellent bending/stamping properties for complex part fabrication.
Surface Quality: Uniform coating for painted or exposed architectural applications.
Applications
Construction field: Structural support, roof and wall reinforcement and other components for buildings that need to bear large loads.
Automobile manufacturing field: to meet the demand for automobile lightweight, body parts, chassis structural components, etc..
Home appliance field: shells and structural parts of home appliances with high strength requirements to ensure the stability and durability of home appliances in the process of use.
Others: mechanical parts and equipment shells, electric power towers, communication towers, etc.
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)
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
FAQ:
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.
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.
