S350GD is a code used to identify hot-dip galvanized steel products
that adhere to the EN 10346-2009 European standard. The “S” in the
code refers to structural steel, while “350” indicates that the
steel’s yield strength is at least 350 MPa. At Wanzhi Steel, we
offer an extensive range of continuously hot-dip galvanized steel
products, with the highest strength reaching 550MPa. Our range
includes S250GD, S320GD, S450GD, S550GD, and more. The sizes range
from 0.2 mm-3 mm*600 mm-1500 mm, with zinc coating of 60-275 g/㎡.
Our products are known for their high strength, strong corrosion
resistance, and smooth surface finish. They are widely used in
various applications such as building materials or structural
parts, including roofing, wall panels, ventilation pipes, interior
decoration, fencing, steel frames, and more. If you are interested
in learning more about our hot-dip galvanized steel products,
please feel free to contact us.
What Is S350GD?
S350GD is a code of hot dip galvanized steel, which is a type of
structural steel that has a minimum yield strength of 350 MPa. It
is often followed by “+Z” or “+AZ” and number, which indicates the
thickness of the zinc or aluzinc coating. For instance, S350GD+Z275
refers to galvanized steel that has been coated with a zinc layer
weighing 275 g/㎡, while S350GD+AZ150 refers to galvalume steel
coated with an aluminum-zinc alloy weighing 1.5 ounces per square
foot.
Chemical Composition of Steel S350GD
| C | Si | Mn | P | S |
| ≤0.2% | ≤0.6% | ≤1.7% | ≤0.1% | ≤0.045% |
Mechanical Properties of S350GD+Z275
| Item | S350GD |
| Rm – Tensile Strength | 400 MPa |
| Rp0.2 – 0.2% Yield Strength | 350 MPa |
| A – Min. elongation Lo = 80 mm | 16% |
Below is mechanical properties of S280GD for your reference.
| Item | S350GD |
| Rm – Tensile Strength | 360 MPa |
| Rp0.2 – 0.2% Yield Strength | 280 MPa |
| A – Min. elongation Lo = 80 mm | 18% |
Equivalent Grades
| Europe | USA | Japan | Australia | China |
| EN | ASTM | JIS | AS | GB |
| S350GD | SS Grade 340 | SGC440 | G350 | S350GD |
Difference Between SGCC, SGHC, S350GD, and DX51D
Let’s learn the meaning of the codes first.
SGCC (JIS G3302): S- Steel; G- Galvanized; C- Cold rolled steel; C-
for common uses; which is equivalent to DX51D+Z.
SGHC: S- Steel; G- Galvanized; H- Hot rolled steel; C- for common
uses;
S350GD: S- Structural steel; 350- yield strength should be at least
350MPa; GD- Galvanized;
DX51D: D- low carbon steel; X – the rolling state of the substrate
is not specified; 51 – steel grade for common uses; D- Galvanized.
