G90 Galvanized Steel

G90 galvanized steel is a durable galvanized steel product. “G+number” is used to describe the zinc coating thickness of galvanized steel according to ASTM Standards (ASTM-A525 or ASTM-A653/A653M). Wanzhi Steel specializes in the production of G90 galvanized steel. We offer all thicknesses and widths, which can be processed into coils, plates and tubes. We also provide slitting, cutting, profiling and perforation services. If you would like to know more, please contact me for a free quote.

G90 Galvanized Steel Specifications

Product Name	G90 Galvanized Steel
Thickness(mm)	0.12 – 4.0mm
Width(mm)	600 – 2000mm or as your request
Length(mm)	According to your requirements
Material	DX51D, DX52D, DX53D, Q235, Q345, SPCC, SGCC, A653, A653M, etc.
Standard	GB, JIS, EN, ASTM etc.
Coating Thickness	G90
Spangle Type	Zero spangle, small spangle, regular spangle, large spangle
MOQ	10 Tons
Packaging	Standard export package or as per your requirements

Features

1. Strong corrosion resistance

The galvanizing amount of G90 galvanized steel is equivalent to 275g/m², which is relatively thick, ensuring its excellent corrosion resistance.

2. Good processing performance

G90 galvanized steel can be welded, profiled, punched, sheared, painted and other operations, with good processing performance.

3. Strong decorative effect

The surface of G90 galvanized steel is smooth and uniform, and different surface states meet the different needs of customers.

Production Video

Uses of G90 Galvanized Steel

G90 galvanized steel is actually a kind of high-zinc coated steel. It is commonly used in a variety of applications due to its excellent corrosion resistance, for example,

1. Roofing and siding.

2. Structural components, such as beams, columns, and purlins.

3. Outdoor and indoor storage, such as storage tanks, silos, and sheds.

4. Agricultural equipment, such as feed bins, barns, and poultry houses.

5. Automotive and transportation industries for parts and components that require a high level of corrosion resistance.

G90 VS Z275 Galvanized Steel

The Meaning Of G90

The “G” here refers to galvanizing, and the number refers to the weight of zinc on the surface of the steel sheet, such as G30, G60, G90, and G185. The higher the number, the thicker the zinc coating. For example, G90 galvanized steel has a zinc coating weight of 0.9 ounces per square foot. While G60 means the dual-sided coating weight is 0.6 oz/ft².

Z275 Galvanized Steel Meaning

According to the EN 10346 standard, Z+number is used to specify the zinc coating thickness of hot-dip galvanized products. Z here means zinc, and the number refers to the zinc coating weight. For example, Z275 means the weight of zinc on both sides of the steel surface is 275 grams per square meter. While Z140 or Z14 is often used to describe the zinc coating weight of 140 g/m². Also, the higher the number, the thicker the zinc coating.

There are some commonly used codes, such as DX51D+Z275. You may find the codes on the package of steel coils or sheets.

DX51D+Z275 is a designation for hot-dipped galvanized steel according to European standards. The first letter “D” means flat steel for cold forming, and “X” here means that the rolling state of the substrate is not specified. If the letter is C, it means that the substrate is specified as a cold-rolled substrate; if the letter is D, the substrate is specified as a hot-rolled substrate. The number (51, 52, 53, 54, etc) indicates the serial number of the steel grade, and “51” is for general uses. The “D” after the number means hot-dip galvanizing. Z275 refers to the zinc coating thickness of 275 g/m². Except for zinc coating, you may find galvalume coating (AZ), ZAM coating, etc.

Corresponding standard expression

Let’s convert them to the same units. 1 ounce/sq ft is about 305.15 g/m². Then 0.9 ounces/sq ft is about 275 g/m². Therefore, G90 and Z275 actually describe the same zinc coating thickness of galvanized steel. “G+number” is commonly used in the USA and provides a basic level of corrosion protection for steel. While “Z+number” is commonly used in Europe and other countries.

Some customers would like to use the unit of microns (μm) to calculate the thickness of the zinc layer. The density of zinc is 7.14 grams/cm³.  In terms of the Z275 galvanized sheet,  275/7.14=38.5154 cm³=38515.4 mm³, that is, the average thickness per square meter is 38.5154 μm (total both sides). Below is a table for your reference.

EN 10346 Standard	ASTM Standard	Ounce/sq ft (both sides)	Gram /m2 (both sides)	Microns (one side)	Mils (one side)
Z90	G30	0.3	90	6	0.25
Z120	G40	0.4	120	9	0.34
Z180	G60	0.6	180	13	0.51
Z275	G90	0.9	275	19	0.76
Z350	G115	1.15	350	25	0.97

G90 vs G60

Galvanization refers to the process of applying a protective zinc coating to steel or iron to prevent rusting. The letters “G” followed by a number (like G60 or G90) indicate the thickness of the zinc coating. G90 has a zinc coating weight of 0.9 ounces per square foot. G60 steel has a zinc coating weight of 0.6 ounces per square foot. Generally, the thicker the zinc coating, the better the corrosion resistance and durability. Obviously, G90 galvanized steel provides a thicker and more durable zinc coating compared to G60 galvanized steel, making it more durable and long-lasting.

G90 GI Steel Manufacturer – Wanzhi Steel

Wanzhi Steel offers hot-dip galvanized (30-275 g/m²) and electrogalvanized (up to 30 g/m²) steel in various formats, including coils, sheets, corrugated sheets, strips, and tubes. Our factory, located in Shandong, China, is ISO9001 certified. Over the years, we have built a multilingual team with extensive export experience. Our high-quality products and excellent service have helped us achieve global deployment in 120 countries.

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