Description

Z275 Hot Dip Galvanized Steel Coil is a widely used steel product in various industrial fields. Its core characteristic lies in its uniform, dense zinc coating, providing excellent corrosion resistance. Z275 Hot Dip Galvanized Steel Coil corresponds to the American standard G90 Hot Dip Galvanized Steel Coil (0.90 oz/ft² ≈ 275 g/m²). It is a hot-selling high-zinc coated hot dip galvanized steel coil product.

Features of Z275 Hot Dip Galvanized Steel Coil:

Specific Zinc Coating Weight:

“Z275” indicates a total zinc coating weight of 275 grams per square meter (g/m²), classifying it as a high-zinc coated sheet with strong corrosion resistance.

Excellent Corrosion Resistance:

The zinc coating of Galvanized Steel Coil acts as a sacrificial anode, preferentially corroding to protect the internal steel substrate; it also forms a dense basic zinc carbonate protective film in the atmosphere, further slowing down corrosion.

Excellent Adhesion and Bond Strength:

Utilizing a hot-dip galvanizing process (450–460℃), a zinc-iron alloy layer is formed, ensuring a strong bond between the coating and the substrate, preventing peeling.

Excellent Processing Performance:

Suitable for cold stamping, bending, stretching, shearing, leveling, slitting, and other forming processes, with the coating less prone to cracking.

Diverse Surface Finishes:

Z275 Hot Dip Galvanized Steel Coil is available in the following finishes based on the spangle control process:
Normal Spangle (Z)
Small Spangle (X)
Bright Spangle (GZ, suitable for painting or deep drawing)

Common Environmental Treatments:

Most products employ a chromium-free passivation process, meeting environmental requirements.

Strong Mechanical Property Adaptability:

Z275 Hot Dip Galvanized Steel Coil base material grades such as DX51D, DX54D, and S450GD can meet different strength and forming requirements. .

Main applications of Z275 Hot Dip Galvanized Steel Coil: Due to its corrosion resistance, ease of processing, and long service life.

Z275 Hot Dip Galvanized Steel Coil is widely used in the following fields:

Construction Industry:
Roofing sheet panels, wall panels, light steel keel, corrugated steel sheets, roller shutters, steel structure workshops, etc.

Home Appliance Manufacturing:
Refrigerator, washing machine, air conditioner casings and base plates, etc.

Automotive Industry:
Chassis, body structural components, internal parts (especially areas requiring corrosion resistance).

Metal Products and Machinery Manufacturing:
Elevator cars, pressure vessels, sanitary ware, rail components, solar panel brackets, etc.

Other Fields:
Power transmission towers, bridge components, agricultural facilities (such as sprinkler irrigation systems), steel silos, etc.

Chemical Composition of Galvanized Steel Coil:

Standard	Grade	C	Si	Mn	P	S	Ti
Forcold Forming Chinese Standard	DX51D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX52D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX53D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX54D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX56D+Z	0.12	0.5	0.6	0.1	0.045	0.3
	DX57D+Z	0.12	0.5	0.6	0.1	0.045	0.3
Forcold Forming Japanese Standard	SGCC	0.15	0.5	0.8	0.05	0.03	0.025
	SGCD1	0.12	0.5	0.6	0.04	0.03	0.025
	SGCD2	0.1	0.5	0.45	0.03	0.03	0.025
	SGCD3	0.08	0.5	0.45	0.03	0.03	0.025
	SGCD4	0.06	0.5	0.45	0.03	0.03	0.025
For Structure Japanese Standard	SGC340	0.25	0.5	1.7	0.2	0.035	0.025
	SGC400	0.25	0.5	1.7	0.2	0.035	0.15
	SGC440	0.25	0.5	2	0.2	0.035	0.15
	SGC490	0.3	0.5	2	0.2	0.035	0.025
	SGC510	0.3	0.5	2.5	0.2	0.035	0.025
For Structure AISI Standard	S220GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S250GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S280GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S320GD+Z	0.2	0.6	0.7	0.1	0.045	0.025
	S350GD+Z	0.2	0.6	0.7	0.1	0.045	0.15
	S550GD+Z	0.2	0.6	0.7	0.1	0.045	0.15

Mechanical Properties of Galvanized Steel Coil:

Grade	Yield Strength MPa≥	Tensile Strength MPa≥	Elongation A%≥
DX51D Z/ZM/AZ/AM	240-380	270-500	22
DX52D Z/ZM/AZ/AM	140-300	270-420	26
DX53D Z/ZM/AZ/AM	140-260	270-380	30
DX54D Z/ZM/AZ/AM	120-220	260-350	36
S220GD Z/ZM/AM	220	300	20
S250GD Z/ZM/AZ/AM	250	330	19
S280GD Z/ZM/AM	280	360	18
S300GD A/AM	300	380	18
S320GD Z/ZM/AM	320	390	17
S350GD Z/ZM/AZ/AM	350	420	16
S450GD A/AM	450	480	15
S550GD Z/ZM/AZ/AM	550	550	–

Standards and Classifications

Technical Standard	EN10147, EN10142, DIN 17162, JIS G3302, ASTM A653
Steel Grade	Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD, S350GD, S350GD, S550GD; SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490, SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570; SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40 (275), SQ CR50 (340), SQ CR80 (550); or Customer’s Requirement
Type	Coil/Sheet/Plate/Strip
Thickness	0.12-6.00mm,or customer’s requirement
Width	600mm-1500mm, according to customer’s requirement
Type of Coating	Hot Dipped Galvanized Steel (HDGI)
Zinc Coating	30-275g/m2
Surface Treatment	Passivation(C), Oiling(O), Lacquer sealing(L), Phosphating(P), Untreated(U)
Surface Structure	Normal spangle coating(NS), minimized spangle coating(MS), spangle-free(FS)
Quality	Approved by SGS,ISO
ID	508mm/610mm
Coil Weight	3-20 metric ton per coil
Package	Water proof paper is inner packing,galvanized steel or coated steel sheet is outer packing , side guard plate,then wrapped by seven steel belt.or according to customer’s requirement
Export market	Europe, Africa, Central Asia, Southeast Asia, Middle East, South America, North America, etc