S280GD Galvanized Steel
S280GD galvanized steel is a structural hot-dip galvanized steel with a minimum yield strength of 280MPa. Produced under EN 10346, ASTM A653, and JIS G3302 standards, our range includes coils, roofing panels, appliance casings, structural tubes, and custom profiles.
S280GD is a strong, low-alloy structural steel that's widely used in construction and manufacturing. With a minimum yield strength of 280 MPa, it's tough enough for demanding structural tasks. The hot-dip zinc coating provides superior protection against corrosion, guaranteeing extended durability. Thanks to this blend of strength and protection, the S280GD is perfect for structural frames, roofing systems, and other heavy-duty applications.
S280GD Galvanized Steel Coil Mecahmical Properties
| Property | Value | |
| Tensile Strength (Rm) | 360 MPa | |
| 0.2% Proof Strength (Rp0.2) | 280 MPa | |
| Min. Elongation (A, Lo = 80 mm) | – | 18% |
| 0.5mm < t ≤ 0.7mm | 16% | |
| 0.35mm < t ≤ 0.5mm | 14% | |
| t ≤ 0.35mm | 11% | |
| Bending Center Diameter (mm) | 1a | |
| S280GD tensile strength can range up to 140 MPa, depending on the specific material grade and processing conditions. | ||
S280GD Galvanized Steel Coil Chemical Composition
| Element | Content (weight%) |
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | ≤ 1.70 |
| Phosphorus (P) | ≤ 0.10 |
| Sulfur (S) | ≤ 0.045 |
| Silicon (Si) | ≤ 0.60 |
S280GD Steel Properties
High Corrosion Resistance:
The hot-dip galvanizing process creates a durable zinc coating that effectively prevents rust, ensuring the steel can withstand prolonged exposure to humidity and wet conditions.
Enhanced Structural Stability:
S280GD maintains its mechanical performance under both static and dynamic loads, making it reliable for load-bearing frameworks and dynamic structures like bridges and cranes.
Excellent Formability:
This steel grade can be easily shaped into complex components such as roofing profiles, wall cladding, and structural panels without cracking or losing surface quality.
Strong Coating Adhesion:
The zinc coating is tightly bonded to the steel surface, ensuring long-term corrosion protection even after cutting, bending, or forming.
Outstanding Weather Resistance:
S280GD resists environmental wear in harsh climates, including prolonged exposure to rain, snow, and temperature fluctuations, ensuring a consistent performance over time.
High Heat Reflectivity and Insulation Capability:
Its surface can reflect a significant amount of radiant heat, helping to maintain stable interior temperatures in structures and making it an effective material for energy-efficient roofing or insulation.
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 | -- |
Zinc Thickness
| Zinc Coating Grade | Zinc Coating (g/m²) | Corrosion Resistance | Typical Applications | Remarks |
| Z30 | 30 | Very low | Indoor parts, home appliance inner panels, ventilation ducts | Not suitable for outdoor use |
| Z60 | 60 |
Low |
Indoor structures, temporary facilities | Low cost |
| Z80 | 80 | Medium | Light steel structures, base metal for PPGI | Good cost performance |
| Z100 | 100 | Medium | PPGI, fencing, general construction
|
Common export grade |
| Z120 | 120 | Medium-High |
|
Longer service life |
| Z140 | 140 | Medium-High | Industrial buildings, agricultural facilities | Suitable for outdoor use |
| Z180 | 180 | High | Long-term outdoor structures, equipment housings
|
Recommended for outdoor use |
| Z200 | 200 | Very high | Humid environments, heavy structures
|
Higher cost |
| Z275 | 275 | Excellent
|
Coastal areas, solar mounting systems, high-corrosion environments | High standard |
FAQ:
What are common coating types available on S280GD?
S280GD can be galvanized with pure zinc (+Z), zinc-iron (+ZF), zinc-aluminum (+ZA), zinc-magnesium (+ZM), aluminum-zinc (+AZ) and aluminum-silicon (+AS).
What is the minimum yield strength of S280GD?
Minimum yield strength (Rp0.2) is 280 MPa.
What is the typical tensile strength?
Minimum tensile strength is around 360 MPa.
What is the minimum elongation?
Minimum elongation A80 is typically 18 % (varies slightly with thickness).
What thicknesses are available for S280GD sheet/coils?
Thickness can range from about 0.12 mm up to 6.0 mm or more upon request.
Can S280GD be supplied with customized widths and lengths?
Yes - widths (e.g., 600–2000 mm) and lengths/coils can be customized.