What Is The Properties Of Hot-dip galvanized steel S250GD?

S250GD Galvanized Steel

S250GD galvanized steel sheet/plate is a low-alloy, high-strength hot-rolled steel, commonly used in construction, automotive, and appliance industries. Its main components include iron and low carbon content, typically between 0.06%-0.12%. The steel sheet/plate is coated with a zinc layer through hot-dip galvanizing, which provides a uniform protective barrier against corrosion.

With a tensile strength of 250 MPa, S250GD can handle significant mechanical stress. The zinc layer enhances its durability, making it suitable for outdoor applications and extending product lifespan while minimizing maintenance needs.

S250GD Galvanized Steel

Properties

S250GD is characterized by a balanced combination of strength, ductility and corrosion resistance. The minimum yield strength Rp0.2 of 250 N/mm² and a tensile strength in the range of 360-510 N/mm² guarantee a reliable load-bearing capacity with sufficient ductility. Thanks to the hot-dip galvanized surface, the steel achieves long-lasting corrosion protection, making it resistant even in aggressive climates and industrial environments.

The different cover variants offer specific advantages:

+Z (pure galvanized):

Standard corrosion protection for general conditions.

+ZF (zinc-iron):

Improved coating adhesion and increased resistance to mechanical stress.

+ZA (zinc-aluminium):

Optimized resistance in atmospheric environments.

+ZM (zinc-magnesium):

Extended protection in maritime and saline zones through passivating behavior.

+AZ (aluminum-zinc):

Combination of heat resistance and corrosion protection, ideal for high surface temperatures.

+AS (aluminum-silicon):

Especially for applications with extreme temperature influences and high corrosion loads.

Structural steel - Properties according to DIN EN 10 346

Steel type

Short designation	Surface finish	Material number
S250GD	+Z,+ZF,+ZA,+ZM,+AZ,+AS	1.0242

S250GD | 1.0242: Mechanical properties (longitudinal)

Proof stress Rp0,2¹⁾MPa min.	Tensile strength Rm²⁾ MPa min.	Elongation at fracture A80³⁾ % min.
250	330	19

S250GD | 1.0242: Chemical composition (heat analysis)

Percentage by weight % max.
C	Si	Mn	P	S
0.20	0.60	1.70	0.10	0.045

Product Parameters

Parameter		Details
Standard		EN 10346, EN 10142, EN 10025, EN 10143, ASTM A653/A653M, ISO 3574, ASTM A123/A123M, ISO 1461, ASTM A792/A792M, etc.
Grade		S250GD
Metal Coating Type		Z (Pure Zinc), ZF (Zinc-Iron Alloy), ZA (Zinc-Aluminum Alloy), ZM (Zinc-Magnesium Alloy), AZ (Aluminum-Zinc Alloy), AS (Aluminum-Silicon Alloy)
Thickness	Sheet	0.5-6.0 mm, or as requested
Thickness	Plate	6-300 mm, or as requested
Width	Sheet	600-2,000 mm, or as requested
Width	Plate	900-4800 mm, or as requested
Length	Sheet	1,000-6,000 mm, or as requested
Length	Plate	3000-25000 mm, or as requested
Tolerance		±1%, or as requested
Galvanization		Hot-Dip Galvanizing, Electro-Galvanizing, Pre-Galvanizing
Zinc Coating		Z30-600 g/m²
Surface Structure		Regular Spangle, Minimized Spangle, Zero Spangle, Big Spangle
Surface Treatment		1) Skin Pass, Sand Blasted 2) Pre-painted 3) Galvanized 4) Oiled 5) Passivated 6) PE, SMP, PVDF, or other anti-corrosive coatings 7) As requested
Condition of Delivery		+HR/+CR/+A/+AR/+EG/+HDG, or as requested
Testing Method		CCA/MPT/CST/SST/MA/NDT, etc.
Application		Roofing panels, wall cladding, structural framing, safety barriers, body panels, chassis components, cable trays, electrical enclosures, grain storage bins, greenhouse structures, shelving units, metal cabinets, etc.
Certification		Approved by ISO 9001, CE
Packaging		Standard seaworthy packing, or as requested

Material Comparison

Chinese Standard	Japan Standard	European Standard
DX51D Z/DC51D Z (CR)	SGCC	DX51D Z
DX52D Z/DC52D Z	SGCD1	DX52D With
DX53D Z/DC53D Z/DX54D Z/DC54D Z	SGCD2/SGCD3	DX53D Z/DX54D Z
S220/250/280/320/350/550GD Z	SGC340/400/440/490/570	S220/250/280/320/350GD Z
DX51D Z/DD51D Z (HR)	SGHC	DX51D Z