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What Are The S320GD Galvanized Steel Coil Specifications?

Jan 21, 2026

S320GD Galvanized Steel Coil

 

S320GD steel chemical composition is tailor-made for high durability and corrosion resistance, and is thus great for structural applications. It usually has low carbon, manganese, phosphorus, and sulfur levels to strike a balance between strength and workability. S320GD has improved galvanization properties from the zinc coating, granting higher protection against environmental wear and corrosion when compared with other steel grades like S235 or S355. This particular patch of qualities gives it a set of features that make it an apt choice in construction and in fabrication.

 

S320GD Galvanized Steel Coil

 

S320GD Galvanized Steel Coil Specifications

 

Specification Metric (mm) Imperial (inch)
Thickness 0.3 – 3.0 mm 0.012 – 0.118 in
Width 600 – 1500 mm 23.62 – 59.06 in

 

S320GD Galvanized Steel Strip Specifications

 

Specification Metric (mm) Imperial (inch)
Thickness 0.3 – 3.0 mm 0.012 – 0.118 in
Width 20 – 600 mm 0.79 – 23.62 in

 

GNEE STEEL offers S320GD steel coils and strips in various widths and thicknesses. We also supply S320GD galvanized steel with custom specifications to meet diverse industry needs.

 

S320GD Galvanized Steel Applications

 

GNEE STEEL supplies S320GD steel in coils and strips, ensuring reliable quality tailored to diverse industry needs. It combination of durability, strength, and cost efficiency.

 

Construction and Infrastructure: Roofing panels, wall cladding, structural frameworks, bridges, guardrails, and support beams.

Automotive Industry: Body panels, chassis components, reinforcements, crash-resistant structures.

Manufacturing and Engineering: Metal enclosures, HVAC ducts, electrical cabinets, storage systems, and machinery parts.

Agricultural Equipment: Silos, fencing, farm machinery, outdoor storage facilities.

Energy and Utilities: Power transmission towers, solar panel supports, wind turbine components, industrial pipelines, and water tanks.

 

Mechanical Properties

 

Hide/Show specific columns Edit

 

Coating

Standard

Yield strength Re 1)
(min MPa)

Tensile strength Rm
(min MPa)

Elongation A80 2)
(min %)

S220GD

Z, ZA, ZF

EN 10346

220

300

20

S250GD

Z, ZA, ZF

EN 10346

250

300

19

S280GD

Z, ZA, ZF

EN 10346

280

360

18

S320GD

Z, ZA, ZF

EN 10346

320

390

17

S350GD

Z, ZA, ZF

EN 10346

350

420

16

 

1) If no pronounced yield point is present, the 0.2 % yield point value Rp0,2 is used. If the yield point is pronounced, the values apply to the upper yield point ReH.

2) Decreased minimum elongation A80 values apply to thicknesses 0.50mm < t ≤ 0.70mm (minus 2 units) and t ≤ 0.50mm (minus 4 units).

 

  • Material Testing

Testing direction of metal coated structural steels is longitudinal to the rolling direction.

Each metal coated mother coil is regarded as one test unit. Mechanical properties (EN-ISO 6892-1) and coating mass (EN 10346) are determined per test unit.

An inspection document of the required type according to EN 10204 is provided when agreed in the order.

 

Available Steel Grade

 

Available Steel Grade(Ensure weight and support third-party testing)

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

--

Select type Galvanized Steel based on requirements

 

FAQ:

 

Is S320GD suitable for cold forming?

Yes. S320GD has good formability and is suitable for roll forming, bending, and cold shaping processes.

What thickness range is available for S320GD galvanized steel?

S320GD galvanized steel is commonly available from thin gauges (around 0.35 mm) up to structural thicknesses of 6.0 mm or more, depending on supply capability.

What surface finishes are available for S320GD galvanized steel?

Typical surface finishes include regular spangle, minimized spangle, and zero spangle, depending on application requirements.

How long does S320GD+Z275 galvanized steel last?

In normal environments, S320GD+Z275 can provide corrosion protection for 15–30 years, depending on exposure conditions.

What is the tensile strength of S320GD galvanized steel?

The tensile strength typically ranges from 420 MPa to 550 MPa.

Is S320GD galvanized steel suitable for structural framing?

Yes. It is specifically designed for structural use, offering reliable strength and durability for framing systems.

Can S320GD galvanized steel be painted?

Yes. Galvanized steel can be painted after proper surface treatment, such as cleaning or light passivation.

 

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