Weight of galvanized sheet, weight of corrugated sheet - table, calculation

home

About company

Directory

Galvanized sheet

Corrosion destroys about 10% of all metal produced in the world; every sixth or seventh blast furnace works in vain: the steel smelted in it completely turns into rust within a year. Even in developed countries with high technology, the damage caused by corrosion can reach 4% of GDP. One of the most effective ways to protect against corrosion is to apply a protective layer of zinc to the surface of metal structures. Galvanizing is several times cheaper than paint and varnish coatings, and, at the same time, extends the service life of the metal by 30-40 years.

Sheet (also rolled) galvanized steel is produced:

• hot galvanizing of thin-sheet cold-rolled steel coils;
• by applying galvanic coating;
• spraying (gas-thermal method);
• thermal diffusion galvanizing.

The most common is hot-dip galvanizing; this technology makes it possible to produce a strong and durable anti-corrosion coating with a thickness of 10 to 60 microns at the lowest cost. Matte white, sometimes with a gray tint without shine, the coating obtained by hot-dip galvanizing is inferior in decorative qualities to shiny and silver galvanized ones, but has greater hardness and excellent strength characteristics.

Galvanized sheet GOST 14918-80 (technical conditions and requirements)

Standard 14918-80 applies to cold-rolled carbon steel 0.5 to 2.5 mm thick that has been continuously hot-dip galvanized (which results in the formation of a corrosion-resistant Zn-Fe alloy on the metal surface). For galvanizing low-carbon steels, technical conditions are determined separately, by standard R 52246-2004.

Material characteristics

Galvanized sheet is produced by rolling steel with the addition of zinc, the latter covering the product on all sides. Due to this, the development of corrosion processes formed during the interaction of iron with oxygen contained in the air is prevented.

On sale you can find material that is coated with zinc on only one side. This is required in order to subsequently send the sheets for further processing, which may include the following:

1. Hood;
2. Bending;
3. cutting;
4. Profiling and so on.

On sale you can find several types of galvanized steel sheets - corrugated, smooth, made in the form of corrugated sheets.

During the processing of the product, all its useful technical characteristics are preserved:

• Mechanical strength;
• Flexibility;
• Resistance to corrosion processes;
• Ability to post-process.

To obtain such material, high-quality sheet steel obtained through the cold rolling process is used. Zinc is applied using galvanic technology or hot-dip galvanizing.

The galvanic application method consumes a significantly greater amount of energy compared to hot-dip galvanizing. As a result, it is much more efficient to pass a sheet of steel through molten zinc. The coating can be uniform or patterned. It is worth noting that zinc coating can have different colors and textures. The service life of the material is several decades.

Zinc is applied using galvanic technology or hot-dip galvanizing

Galvanized sheet, dimensions according to GOST 19904-90 (assortment)

Dimensions, maximum deviations and requirements for manufacturing accuracy for galvanized steel are established by the GOCT 19904-90 assortment in the same way as for non-galvanized cold-rolled sheet steel.

Galvanized steel according to specifications in accordance with GOCT 14918-80 is manufactured in widths from 700 to 1800 mm (size increments depending on the range of 50, 100 and 150 mm), lengths from 1000 to 6000 mm (size increments 20, 80, 100, 150, 200, 300, 500 mm), however, by agreement with the consumer, if necessary, other sizes can be installed.

The thickness of the galvanized sheet is regulated in the range from 0.5 to 2.55 mm, and the assortment determines the following dimensional step:

• thickness range 0.5-0.8 mm - step is 0.05 mm;
• range 0.8-1.8 mm - step 0.1 mm;
• range 1.8-2.5 - step 0.2, last - 0.3 mm.

Why is it necessary to know the mass of a leaf?

This indicator is needed to determine the profile dimensions of columns and beams, which is due to the creation of a load from the sheet’s own weight on the supporting structures. The absence of this value in the calculations can lead to premature failure of buildings from normal operation. The second reason is to determine the quality of the coating. Depending on the correspondence of the values ​​obtained as a result of calculations to the actual data, one can judge the quality of the coating and the compliance of its thickness with established standards. With a small amount of zinc on the surface, the duration of trouble-free operation of the product is reduced.

Weight of galvanized sheet

The weight of a galvanized sheet (one square meter) can theoretically be calculated using the formula:

M=M1×t1+M2×t2

(1)

Where:

• M - weight of 1 m² of galvanized sheet, kg;
• M1 - weight of 1 m² of steel sheet without a cladding layer 1 mm thick;
• t1 is the thickness of the steel sheet without coating;
• M2 - weight of 1 m² of zinc cladding layer 1 mm thick;
• t2 is the thickness of the zinc layer on both sides of the sheet.

The specific gravity of carbon steel is 7.85 g/cm³, or, for convenience of calculations, it is generally accepted that 1 m² of sheet steel with a thickness of 1 mm weighs 7.85 kg. The specific gravity of zinc is slightly less - 7.13 g/cm³, that is, 1 m² of zinc with a thickness of 1 mm weighs 7.13 kg. Taking into account these quantities, formula (1) can be rewritten:

M=7.85×t1+7.13×t2

The thickness of the zinc layer depends on the coating class (GOCT 14918-80) and is indicated in the symbol:

To calculate the weight of a galvanized sheet, you can also use a formula that takes into account the weight of the coating depending on the class of layer thickness:

M=7.85×t1+Mp.s., where:

• M - galvanized sheet weight 1 m², kg
• t1 is the thickness of the steel sheet without coating;
• Mp.s. - the average weight of the tread layer depending on the thickness class, the value is standardized by GOCT 14918-80.

To calculate how much a galvanized sheet weighs (the weight of one sheet of the required size), use the formula:

Msheet=M×S, where:

• Msheet - weight of one galvanized sheet, kg;
• M – weight of 1 m², kg;
• S—sheet area, m².

Considering that the GOST 19904-90 assortment allows deviations from the design weight of up to 3% (due to regulated maximum deviations in thickness, length and width), as well as taking into account the small thickness of the cladding layer and the small difference between the specific gravity of steel and zinc alloy ( which may contain lead and aluminum), the theoretically calculated mass may differ slightly from the actual weight.

According to GOCT 14918-80, galvanized steel can be manufactured with a differentiated coating: on one side thickness class No. 2, and on the other - No. 1 or P, which is taken into account when calculating weight.

OTs-5 Casting made of galvanized steel, 0.5 mm thick, 50x2000

Painting in RAL colors

carries out the production of metal products painted at your request in any color according to the RAL marking.
Along with painted products, you can purchase from our company roofing screws, screws, and rivets, also painted in RAL color according to your request. To place an order for painting steel products and painting fasteners for installation, send us a request by E-mail or call +7 (495) 230-10-82

Frequently requested RAL colors:

RAL 1014; RAL 1015; RAL 1018; RAL 3003; RAL 3005; RAL 3009; RAL 3011; RAL 3020; RAL 5002; RAL 5005; RAL 5010; RAL 5021; RAL 6002; RAL 6005; RAL 6020; RAL 7004; RAL 7024; RAL 7035; RAL 8004; RAL 8017; RAL 8019; RAL 9003; RAL 9005; RAL 9016

Full list of RAL colors: