What is S280GD Steel?
S280GD is a non-alloy structural steel, made of about 98-99% iron and 0.1-0.2% carbon, meeting EN 10346 with a minimum yield strength of 280 MPa. It is a flat-rolled steel, typically hot-dip galvanized for corrosion resistance. In S280GD, "S" denotes structural steel, "280" the yield strength, and "GD" galvanization. It comes with finishes like +Z (zinc) and +ZF (zinc-iron), suitable for construction, automotive, and light engineering. Similar to FeE280G, it has an EU steel number of 1.0244.
The name S280GD is derived from European standard EN 10346 and stands for:
- S: Structural grade steel.
- 280: Minimum yield strength of 280 MPa.
- GD: Suitable for continuous hot-dip galvanization.
Application of S280GD Steel
Our S280GD has a wide range of uses, including but not limited to the following scenarios. You can leave us a message about your target location or specific needs, and our experts will help you choose the right steel.
Construction: Beams, wall panels, and structural supports.
Automotive: Car frames, chassis components, and body panels.
Appliances: Refrigerator bodies, washing machine drums, and oven exteriors.
Roofing and Cladding: Roofing sheets, facade panels, and wall cladding.
HVAC Systems: Air ducts, ventilation hoods, and heat exchangers.
Agricultural Equipment: Tractors, plows, and storage bins.
Storage Tanks: Water tanks, fuel containers, and chemical storage units.
Electrical Enclosures: Transformer cases, switchgear boxes, and control cabinets.
Chemical Composition of S280GD Steel
| Element | Content (%) |
| Iron, Fe | 98-99 |
| Carbon, C | 0.1-0.2 |
| Manganese, Mn | ≤ 1.2 |
| Phosphorus, P | ≤ 0.12 |
| Sulfur, S | ≤ 0.045 |
| Silicon, Si | ≤ 0.5 |
| Nitrogen, N | ≤ 0.012 |
| Aluminum, Al | ≤ 0.015 |
Mechanical Properties of S280GD Steel
| Property | Metric | Imperial |
| Tensile Strength | 360-440 MPa | 52-64 ksi |
| Yield Strength | ≥ 280 MPa | ≥ 40.6 ksi |
| Brinell Hardness | 110-140 HB | 110-140 HB |
| Rockwell Hardness | 65-75 HRB | 65-75 HRB |
| Vickers Hardness | 120-140 HV | 120-140 HV |
| Elongation | 20-26% | 20-26% |
| Elastic Modulus | 210 GPa | 30,500 ksi |
| Fracture Elongation (≤ 0.7mm) | ≥ 16% | ≥ 16% |
| Fracture Elongation (> 0.7mm) | ≥ 18% | ≥ 18% |
| Coating Adhesion (Bend Radius) | 0T-2T (0-2x thickness) | 0T-2T (0-2x thickness) |
Available Steel Grade
| Steel grade | Coating | Yield(MPA) | Tensile(MPA) | Elongation(%) |
| DX51D | Z,ZF | -- | 270-500 | 20 |
| DX52D | Z,ZF | 140-300 | 270-420 | 22 |
| DX53D | Z,ZF | 140-260 | 270-380 | 26 |
| DX54D | Z,ZF | 140-220 | 270-350 | 30 |
| S220GD | Z,ZF | 220 | 300 | 18 |
| S250GD | Z,ZF | 250 | 330 | 17 |
| S280GD | Z,ZF | 280 | 360 | 16 |
| S320GD | Z,ZF | 320 | 390 | 15 |
| S350GD | Z,ZF | 350 | 420 | 14 |
| S400GD | Z,ZF | 400 | 470 | -- |
| S450GD | Z,ZF | 450 | 530 | -- |
| S500GD | Z,ZF | 500 | 560 | -- |
FAQ：
What are common applications of S280GD?
Applications include roofing, wall cladding, structural frames, automotive parts, appliances, and HVAC systems.
Is S280GD easy to form and fabricate?
Yes - it has good bendability and formability for cold forming and roll forming processes.
Can S280GD be welded?
Yes - it provides good weldability with proper techniques and care for the coating.
How should S280GD be stored to maintain quality?
Store in a dry, ventilated place away from moisture to preserve the coating and prevent rust. (Based on standard best practices)
What are the equivalent grades in other standards?
Similar grades include ASTM A653/A653M structural grades and others by region/market.
Can the surface finish be pre-painted?
Yes - pre-painted finishes like PE, PVDF, SMP are options for enhanced aesthetics and protection.
Does the zinc coating affect processing performance?
High-quality coating systems resist cracking or delamination during bending and forming.
