Hot-Dipped Galvanized Steel Coil Manufacturer

Discover our premium Hot-Dipped Galvanized Steel Coils, meticulously crafted to meet the highest standards of performance and durability. Coated with a robust layer of zinc, our galvanized steel coils provide superior corrosion resistance, making them the ideal choice for a wide range of applications across various industries.

Hot-dipped galvanized steel coils undergo a specialized process where the steel coil is immersed in a bath of molten zinc, forming a strong metallurgical bond between the zinc and steel. This protective zinc coating creates a reliable and long-lasting barrier against rust and corrosion, ensuring the longevity of the steel in challenging environments.

Our galvanized steel coils are engineered for exceptional durability, making them a top choice for applications in construction, manufacturing, and other industries that demand high-quality corrosion resistance and long-term performance.

Strip Specification

Thickness(mm)

Regular spangle: 0.3-5.0Zero spangle: 0.6-1.8

Width(mm)

32-860

Coating Weight(g/square meter)

50-275

Inner diameter(mm)

508/610

Surface structure

Regular spangle, Zero spangle

Surface treatment

Environmental chromated, Regular chromated

Surface Finish Options for Hot-Dipped Galvanized Steel Coils

Regular Spangle: This is the most common surface finish, known for its distinctive crystalline pattern visible on the surface. The pattern is formed during the cooling process when the zinc coating solidifies. The regular spangle finish provides a unique aesthetic appeal, making it a popular choice for many applications.

Minimized Spangle: This finish features a smaller and less pronounced crystalline pattern compared to the regular spangle finish. It is ideal for applications where a more uniform, sleek appearance is desired. The minimized spangle finish is often preferred for projects where the visual smoothness of the surface is important, while still maintaining the durability and corrosion resistance of the galvanized steel.

Available Steel Grade

Our galvanized steel coils are manufactured strictly in accordance with ASTM A653, EN 10346, and AS 1397 standards. Below are the available steel grades and mechanical properties.

ASTM A653

Mechanical Requirements for Commercial steel (CS Types A, B, and C)

Designation	Yield Strength
	ksi	[MPa]
CS Type A	25/55	[170/380]
CS Type B	30/55	[205/380]
CS Type C	25/60	[170/410]

Mechanical Requirements for Structural Steel(SS)

Designation	Grade	Yield Strength, min,ksi	Tensile Strength, min,ksi
SS	33	33	45
	37	37	52
	40	40	55
	50 Class 1	50	65
	50 Class 2	50	…
	50 Class 3	50	70
	50 Class 4	50	60
	55	55	70
	60	60	70
	70	70	80
	80	80	82

EN 10346

Mechanical properties of low carbon steels for cold forming

Designation			Yield strength (MPa)	Tensile strength (MPa)	Elongation % min.
Steel grade		Symbols for the types of available coatings
Steel name	Steel number	Symbols for the types of available coatings
DX51D	1.0917	+Z,+ZF,+ZA,+ZM,+AZ,+AS,	–	270 to 500	22
DX52D	1.0918	+Z,+ZF,+ZA,+ZM+AZ,+AS	140 to 300°	270 to 420	26

Mechanical properties of steels for construction

Designation			Mechanical properties
Steel grade		Symbols for the types of available coatings	Proof strength (MPa) min.	Tensile strength (MPa) min.	Elongation % min.
Steel name	Steel number	Symbols for the types of available coatings	Proof strength (MPa) min.	Tensile strength (MPa) min.	Elongation % min.
S220GD	1.0241	+Z,+ZF,+ZA,+ZM,+AZ	220	300	20
S250GD	1.0242	+Z,+ZF,+ZA,+ZM,+AZ,+AS	250	330	19
S280GD	1.0244	+Z,+ZF,+ZA,+ZM,+AZ,+AS	280	360	18
S320GD	1.0250	+Z,+ZF,+ZA,+ZM,+AZ,+AS	320	390	17
S350GD	1.0529	+Z,+ZF,+ZA,+ZM,+AZ,+AS	350	420	16
S390GD	1.0238	+Z,+ZF,+ZA,+ZM,+AZ	390	460	16
S420GD	1.0239	+Z,+ZF,+ZA,+ZM,+AZ	420	480	15
S450GD	1.0233	+Z,+ZF,+ZA,+ZM,+AZ	450	510	14
S550GD	1.0531	+Z,+ZF,+ZA,+ZM,+AZ	550	560	–

AS 1397

Formability grade

Steel grade designation	Transverse tensile test		Transverse bend test	Thickness range for lockseam(mm)
	Min.elongation,%		Degree of bend
	on 50 mm	on 80 mm	Degree of bend
G1	–	–	180°	–
G2	30	27	180°	≤1.60
G3	35	32	180°	All

Structural grade

Steel grade designation	Longitudinal tensiletest				Transverse bend test
	Min.yield strength (MPa)	Min.tensile strength (MPa)	Min. elongation,%		Angle of bend degrees	Diameter of mandrel in terms of test piece thickness(t)
	Min.yield strength (MPa)	Min.tensile strength (MPa)	Lo=50mm	Lo=80mm	Angle of bend degrees	Diameter of mandrel in terms of test piece thickness(t)
G250	250	320	25	22	180	0
G300	300	340	20	18	180	t
G350	350	420	15	14	180	2t
G450	450	480	10	9	90	4t
G500	500	520	8	7	90	6t
G550	550	550	2	2	–	–

Application and Recommend Specification

Roofings

Zinc coating: 275 gsm(min), Thickness: 0.40 mm(min), Grade: en 10346 DX51D

Purlins

Zinc coating: 275 gsm(min), Thickness: 1.50 mm(min), Grade: EN 10346 S550GD

Ducts

Zinc coating: 180 gsm(min), Thickness: 0.60 mm(min), Grade: EN 10346 dx51d

Cable Trays

Zinc coating: 275 gsm(min), Thickness: 1.00 mm(min), Grade: EN 10346 dx51d

Zinc Coating	20-275g/m2
Thickness	0.13-0.8 mm
Width	600-1250 mm
Coil ID	508/610mm
Coil weight	3-8 tons
Surface Finish	Mini/Big Spangle
Surface Treatment	Anti-Finger printing ,Chromated, oiled/ non-oiled

Galvanized Steel Coil and Strip

Hot-Dipped Galvanized Steel Coil Manufacturer

Coil Specification

Strip Specification

Surface Finish Options for Hot-Dipped Galvanized Steel Coils

Available Steel Grade