What is the material of S350GD+Z steel coil?
S350GD+Z steel coil is a hot-dip galvanized high-strength structural steel that complies with European standards (EN 10346)
S350GD
S: Structural Steel
350: Minimum yield strength is 350 MPa (megapascals)
GD: Galvanized by Hot-Dip (hot-dip galvanizing process).
+Z: Indicates that the galvanized layer has been passivated (Passivation), usually using chromate or chromium-free passivation to enhance rust resistance and surface adhesion.
Yield Strength: ≥350 MPa
Tensile Strength: 420~510 MPa (specific values refer to the standard)
Elongation: ≥18%~22% (related to thickness)
What is S350GD+Z galvanized steel coil equivalent to?
|
Standard/Region |
Approximate brand |
Description |
|
Europe (EN) |
S350GD+Z (EN 10346) |
Directly corresponds to the original standard |
|
China (GB) |
DX51D+Z (GB/T 2518) |
Similar to galvanized structural steel, but strength matching needs to be confirmed |
|
USA (ASTM) |
A653 SS350 (ASTM A653) |
Galvanized steel, similar strength, but different standard system |
|
Japan (JIS) |
SGCC (JIS G 3302) |
General purpose galvanized steel, additional strength requirements need to be confirmed |
When replacing, it is necessary to check the coating thickness, surface treatment (such as Z = passivation) and mechanical properties parameters required by the project.
What is the application field of S350GD+Z steel?
|
Industry |
Application scenarios |
Recommended configuration |
|
Construction |
Steel structure roof/wall (span ≤ 8m) |
Z140 coating + smooth surface |
|
Automotive |
Truck compartment floor/bracket |
Z180 coating + chromate passivation |
|
Machinery |
Storage shelves/conveyor rails |
Z100 coating + anti-fingerprint treatment |
What is the difference between S350GD+Z Hot dip galvanized steel and DX51D?
|
Comparison items |
S350GD+Z steel |
DX51D galvanized steel |
|
Material category |
High-strength structural steel |
Ordinary commercial steel (mild steel) |
|
Yield strength |
≥350 MPa |
140~240 MPa |
|
Tensile strength |
420~510 MPa |
270~330 MPa |
|
Elongation |
≥18%~22% (thickness related) |
≥22%~26% (easier to form) |
|
Coating code |
Usually Z100~Z275 (double-sided coating, higher corrosion resistance) |
Common Z60~Z180 (thinner coating) |
|
Surface treatment |
+Z (forced passivation treatment, stronger rust prevention) |
Optional passivation (+Z), oiling (+O) or no treatment |
|
Implementation standard |
EN 10346 (European standard), similar to GB/T 2518's S350GD+Z |
EN 10346 (European standard), GB/T 2518 (national standard) |
|
Typical application |
Building load-bearing structures, automobile chassis, industrial brackets |
Roof walls, home appliance housings, ventilation ducts |
|
Mechanical performance requirements |
Strictly meet high strength and high load requirements |
Focus on formability and surface quality |
|
Applicable environment |
Harsh environment with high load and corrosion resistance |
Light load, general anti-corrosion needs |
S350GD+Z is a high-strength steel suitable for load-bearing structures. It has a thicker coating and forced passivation, is more corrosion-resistant, and has a higher price. DX51D is an ordinary soft steel suitable for lightweight applications.