Z275 galvanized steel

Z275 galvanized steel means that the total zinc content per square meter of steel plate is 275 grams, with excellent corrosion resistance and is widely used in construction, automobiles, home appliances and other fields.

Z275 galvanized steel is one of Wanzhi Steel’s hot-selling products, with complete specifications, smooth surface, and thickness between 0.12mm – 3.0mm. If your project requires highly corrosion-resistant galvanized steel, you can choose Z275 galvanized steel.

Z275 GI Steel Specification

Item	Z275 galvanized steel ( Z275 GI Steel )
Thickness	0.12-3.0mm
Width	914mm/1000mm/1200mm/1219mm/1220mm/1250mm/1500mm etc.
Surface treatment	Passivation, oiling, painting, organic coating, etc.
Grade	SGCC,SPCC,SECC,DC01,DC02,DC03,DC04,DC05,DC06.Q195,Q235,Q345,etc.
Surface Spangle	Zero Spangle, Small Spangle, Regular Spangle, Large Spangle
Technical Standard	GBT2518-2008, ASTM A653, JIS G3302-1998, EN 10142-2000
Trade terms	Price terms	EXW, FOB,CFR, CIF
	Payment terms	T/T
Advantage	1. Excellent, Competitive price, 2. Prime quality, 3. Prompt delivery，4.Quality after-sales service
Delivery time	On-time delivery as determined by order quantity
Packaging Details	Water proof paper is inner packing, galvanized steel or coated steel sheet is outer packing, side guard plate, then wrapped by seven steel belts. or according to the customer’s requirement
Application	Workshop, Fluid pipe, Power Plant, Structure pipe, High and low-pressure Boiler tube, Seamless pipe /tube for petroleum cracking,  Conduit pipe, Scaffolding pipe pharmaceutical and ship, building, etc.

Surface treatment of Wanzhi Z275 steel

Plating surface treatment	Description of uses
Chromate Passivation（C）	Surface treatment used after hot-dip plating of high-strength steel plates to reduce white rust during transportation and storage
Chrome Free Passivation（C5）	Surface treatment to limit the amount of environmentally and human-harmful chromium VI in the passivation solution.
Fingerprint-Resistant（N）	Surface treatment after the passivation process to lubricate during processing, to prevent fingerprint staining during handling and to prevent premature blackening of the surface during use.
Chrome-free and fingerprint resistant（N5）	The surface treatment after the passivation process acts as a lubricant during processing prevents fingerprint staining during operation, prevents premature blackening of the surface during use, and requires limiting the amount of hexavalent chromium and other substances in the fingerprint-resistant film that are harmful to the environment and the human body.
Oil（O）	Surface treatment was added after the passivation process to further minimize rust and corrosion during long-distance transportation and long-term storage.

WanZhi Z275 galvanized steel properties

1. Excellent corrosion resistance, suitable for a variety of highly corrosive environments.

2. Supermechanical properties, with a yield strength ranging from 240MPa to 500MPa.

3. Its tensile strength ranges from 270MPa to 500MPa.

4. Elongation requirement of ≥30% for normal processing and ultra-deep punching processing.

5. Wellcold bending performance, in the 180° cold bending test, the steel plate should be intact and not dezincification.

6. Good processing performance, including tensile, stamping, bending, painting, and welding.

Uses of Z275 galvanized steel

1. Construction: roof and roof components, outside walls of civilian and industrial buildings, garage doors, and window blinds.

2. Household appliances: washing machine, refrigerator, television, air conditioner, and ventilation system, Vacuum cleaner, solar water heater.

3. Transportation: car ceiling, auto Industry Muffler, heat shields of the exhaust pipe and catalytic converter, the ship bulkhead, highway fence.

4. Industry: industrial Instruments Electric control cabinet, industrial refrigeration equipment, automatic vending machine.

5. Furniture: lampshade, counter, signboard medical facility, etc.

What is the difference between Z275 and G90?

Z275 and G90 are different expressions of the same galvanizing standard.

G90 Meaning

It is the imperial expression of the American Standard (ASTM A653), expressed in ounces per square foot.
G90 requires a minimum average TST of 0.90 oz/sq ft (total – both sides).

Z275 Meaning

It is the expression in the International System of Units (SI), in g/m2, 275 g/m2 is a high zinc coating. g90 zinc coating after unit conversion, its weight is exactly 275 g/m2. That is, Z275.

What is Z275 galvanized steel?

Z275 galvanized steel is a hot-dip galvanized steel. This galvanized steel is made by hot-dip plating a layer of zinc on the surface of the substrate to give it excellent corrosion resistance and mechanical properties.

In normal atmospheric environment, the service life of Z275 galvanized steel can reach 20-50 years, depending on environmental conditions (such as humidity, pollution level, etc.).

What is the Z in Z275 GI steel?

Z stands for the chemical formula of zinc, Zn. Generally, “Z+number” is used to represent the weight of the zinc layer on both sides of the galvanized sheet per square meter, such as: Z10, Z120 and Z180, which respectively represent 100 grams, 120 grams and 180 grams of zinc per square meter on both sides of the sheet.

What Does 275 Stand For?

“275” represents the weight of the zinc layer, 275 grams of zinc per square meter. This value is the internationally recognized standard for the average thickness of the zinc layer on galvanized steel.

Why is galvanized steel galvanized?

Galvanizing is a well-known and effective method of rust prevention, adding a protective layer to exposed steel to prevent corrosion caused by natural elements. Not only does zinc act as a barrier between the environment and the steel, but it also breaks down first to protect the steel underneath and extend its life. Galvanized steel generally lasts for decades, and the common galvanized coating on the market is double-sided, equal-thickness hot-dip galvanizing.

Z275 – weight marking of coating

Z275 is the coating weight designation for coated steel sheets.

Today, ASTM standards specify and define the type of coating for these products. For example, the most common ASTM standard on the market today is A653A or A653M; this covers all hot-dip galvanized commodities.

The numbers in the standard indicate the weight of the galvanized surface of the steel sheet.

In addition to the ASTM standard, there is also the SI metric system. The two systems are similar, except that the SI system converts inches and pounds of weight to ounces per square foot (oz/ft2), which is then converted to the SI standard mass in grams per square meter (g/m2).

Plating Conversion Formula

1 oz/ft2 (ASTM) = 305.15 g/m2 (SI)

Wanzhi Steel – Professional Manufacturer of Galvanized Steel

As a professional Z275 steel manufacturer, our customers are all over the world, besides Z275 GI steel,  other galvanized steel coil,  GL steel products are for sale too.

Wanzhi always provides new and old customers with high-quality and honest personalized service, the quality is second to none, and the MOQ of Wanzhi Steel is 10 tons. Large quantity discounts available

Wanzhi Steel is a professional galvanized steel manufacturer in China, with an annual export volume of 600,000 tons. The zinc layer of galvanized steel produced ranges from 30-275g/㎡. We always provide customers with high-quality and cost-effective steel. If you want to know more, please contact us.