S350GD Galvanized Steel
Struggling to find S350GD Galvanized Steel with customized width and length? Unlike standard suppliers, GNEE STEEL specializes in OEM customization. We can produce coils and sheets in your exact dimensions, with minimum order quantities as low as 5 tons. Read on to explore our customization cases and strict quality control process.
S350GD+Z275 is a common steel grade that refers to a hot-dip galvanized structural steel with a minimum yield strength of 350 MPa and a zinc coating of 275 grams per square meter. This steel is used in many applications where high strength and excellent corrosion protection are required, such as automotive parts, building structures, roofing materials, etc.
S350GD Galvanized Steel
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S350GD
S stands for Structural Steel. 350 indicates the minimum yield of the steel.
350 means that the steel has a minimum yield strength of 350 MPa (megapascals, megabulls per square millimeter), which is the maximum stress that the steel can withstand before deformation.
GD means that the steel is Galvanized Steel, i.e. the surface of the steel has been hot-dip galvanized to improve its corrosion resistance.
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Z275
Z denotes that the steel is galvanized. 275 denotes a mass of 275 grams of zinc per square metre of steel surface, which means that 275 grams of zinc per square metre of steel plate are coated to provide better corrosion protection.
| Characteristics | Parameters | Advantages |
|---|---|---|
| Coating weight | 275 g/m² (both sides) | High corrosion resistance for harsh environments |
| Salt spray test life | ≥1000 hours without red rust | More durable than normal galvanizing (Z140) |
| Surface treatments | Chromated / Chrome-free passivation | Enhanced coating adhesion, environmentally friendly compliant |
Alternative Names, Standards, and Equivalents
| Standard Organization | Designation/Grade | Country/Region of Origin | Notes/Remarks |
|---|---|---|---|
| UNS | S350GD | International | Closest equivalent to EN 10346 |
| EN | S350GD | Europe | Commonly used in automotive applications |
| ASTM | A653 | USA | Similar properties but different coating specifications |
| JIS | G3302 | Japan | Minor compositional differences to be aware of |
The table above highlights the various standards and equivalents for S350GD steel. While these grades may be considered equivalent, subtle differences in composition and coating processes can affect their performance in specific applications. For instance, ASTM A653 may have different coating thickness requirements, which can influence corrosion resistance.
Chemical Composition
| Element (Symbol and Name) | Percentage Range (%) |
|---|---|
| Fe (Iron) | Balance |
| C (Carbon) | 0.06 - 0.12 |
| Zn (Zinc) | 0.5 - 1.5 |
| Mn (Manganese) | 0.3 - 0.8 |
| P (Phosphorus) | ≤ 0.04 |
| S (Sulfur) | ≤ 0.03 |
Mechanical Properties
| Property | Condition/Temper | Typical Value/Range (Metric) | Typical Value/Range (Imperial) | Reference Standard for Test Method |
|---|---|---|---|---|
| Yield Strength (0.2% offset) | Hot-Dip Galvanized | 350 MPa | 50.8 ksi | ASTM E8 |
| Tensile Strength | Hot-Dip Galvanized | 450 MPa | 65.3 ksi | ASTM E8 |
| Elongation | Hot-Dip Galvanized | 22% | 22% | ASTM E8 |
| Hardness (Brinell) | Hot-Dip Galvanized | 120 HB | 120 HB | ASTM E10 |
| Impact Strength | - | 27 J (at -20°C) | 20 ft-lbf (at -4°F) | ASTM E23 |
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 | -- |
With the upgrading of global infrastructure demand, the market application scenarios of S350GD galvanized steel continue to expand. We not only provide high-quality materials that meet international standards, but also offer a full-chain solution from material selection to processing. Contact us now and let S350GD galvanized steel be a solid partner for your project's success.
