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

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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.

Classification of galvanized steel GOST 14918-80Groups, categories, classesAbbreviation (used for symbolic designation)
1Assignment GroupsGeneral purposeHE
For cold stampingXSh
For cold profilingHP
For paintingPC
2Hood categoriesVery deep drawVG
DeepG
NormalN
3Tread qualityReduced thickness variationUR
Normal thickness variationHP
4Galvanization layer thickness, classI class1
II class2
ElevatedP
5Appearance of galvanization/type of crystallization pattern (by agreement with the customer)With crystallization patternKR
Without crystallization patternMT

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:

ClassLimit values ​​for layer thickness, mmWeight of tread layer on both sides, kg
IFrom 0.018 to 0.04 Average value 0.0290.258-0.570 Average 0.414
IIFrom 0.01 to 0.018 Average value 0.0140.1425-0.258 Average 0.200
P (increased)From 0.04 to 0.060.57-0.855 Average 0.712

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.

Sheet thickness, mmWeight of 1 m² of steel without zinc coating
, kg
Weight of 1 m² of galvanized steel, 1 class of coating thickness
, kg
Weight of 1 m² of galvanized steel, class 2 coating thickness
, kg
Weight of 1 m² of galvanized steel, coating thickness class P
, kg
Number of m² per ton of galvanized steel class 2
10,503,9254,3394,1254,637242,42
20,554,3174,7314,5175,029221,36
30,604,7105,1244,9105,422203,67
40,655,1035,5175,3035,815188,60
50,705,4955,9095,6956,207175,59
60,755,8886,3026,0886,600164,2
70,806,2806,6946,4806,992154,32
80,907,0657,4797,2657,777137,65
91,007,8508,2648,0508,562124,22
101,108,6359,0498,8359,347114,09
111,209,4209,8349,62010,132103,95
121,5011,77512,18911,97512,48783,51
132,0015,70016,11415,90016,41262,89
142,5019,62520,03919,82520,33750,45

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

RAL No.ColorDecoding
RAL 1014Ivory
RAL 1015Light ivory
RAL 1018Zinc yellow
RAL 3003Ruby red
RAL 3005Wine red
RAL 3009Oxide red
RAL 3011Brown red
RAL 3020traffic red
RAL 5002Ultramarine blue
RAL 5005Signal blue
RAL 5010Gentian blue
RAL 5021Water blue
RAL 6002Leaf green
RAL 6005Moss green
RAL 6020Chrome green
RAL 7004Signal gray
RAL 7024Graphite gray
RAL 7035Light gray
RAL 8004Copper brown
RAL 8017Chocolate brown
RAL 8019Gray brown
RAL 9003Signal white
RAL 9005Jet black
RAL 9016Traffic white
Full list of RAL colors:
RAL No.ColorDecoding
RAL 1000Green beige
RAL 1001Beige
RAL 1002Sandy yellow
RAL 1003Signal yellow
RAL 1004Golden yellow
RAL 1005Honey yellow
RAL 1006Maize yellow
RAL 1007Daffodil yellow
RAL 1011Brown beige
RAL 1012Lemon yellow
RAL 1013Oyster white
RAL 1014Ivory
RAL 1015Light ivory
RAL 1016Sulfur yellow
RAL 1017Saffron yellow
RAL 1018Zinc yellow
RAL 1019Gray beige
RAL 1020Olive yellow
RAL 1021Rape yellow
RAL 1023traffic yellow
RAL 1024Ocher yellow
RAL 1026Luminous yellow
RAL 1027Curry
RAL 1028Melon yellow
RAL 1032Broom yellow
RAL 1033Dahlia yellow
RAL 1034Pastel yellow
RAL 1035Pearl beige
RAL 1036Pearl gold
RAL 1037Sun yellow
RAL 2000Yellow orange
RAL 2001Red orange
RAL 2002Vermillion
RAL 2003Pastel orange
RAL 2004Pure orange
RAL 2005Luminous orange
RAL 2007Luminous bright orange
RAL 2008Bright red orange
RAL 2009traffic orange
RAL 2010Signal orange
RAL 2011Deep orange
RAL 2012Salmon orange
RAL 2013Pearl orange
RAL 3000Flame red
RAL 3001Signal red
RAL 3002Carmine red
RAL 3003Ruby red
RAL 3004Purple red
RAL 3005Wine red
RAL 3007Black red
RAL 3009Oxide red
RAL 3011Brown red
RAL 3012Beige red
RAL 3013Tomato red
RAL 3014Antique pink
RAL 3015Light pink
RAL 3016Coral red
RAL 3017Rose
RAL 3018Strawberry red
RAL 3020traffic red
RAL 3022Salmon pink
RAL 3024Luminous red
RAL 3026Luminous bright red
RAL 3027Raspberry red
RAL 3028Pure red
RAL 3031Orient red
RAL 3032Pearl ruby ​​red
RAL 3033Pearl pink
RAL 4001Red lilac
RAL 4002Red violet
RAL 4003Heather violet
RAL 4004Claret violet
RAL 4005Blue lilac
RAL 4006Traffic purple
RAL 4007purple violet
RAL 4008Signal violet
RAL 4009Pastel violet
RAL 4010Telemagenta
RAL 4011Pearl violet
RAL 4012Pearl blackberry
RAL 5000Violet blue
RAL 5001Green blue
RAL 5002Ultramarine blue
RAL 5003Sapphire blue
RAL 5004Black blue
RAL 5005Signal blue
RAL 5007Brilliant blue
RAL 5008Gray blue
RAL 5009Azure blue
RAL 5010Gentian blue
RAL 5011Steel blue
RAL 5012Light blue
RAL 5013Cobalt blue
RAL 5014Pigeon blue
RAL 5015sky blue
RAL 5017Traffic blue
RAL 5018Turquoise blue
RAL 5019Capri blue
RAL 5020Ocean blue
RAL 5021Water blue
RAL 5022Night blue
RAL 5023Distant blue
RAL 5024Pastel blue
RAL 5025Pearl Gentian blue
RAL 5026Pearl night blue
RAL 6000Patina green
RAL 6001Emerald green
RAL 6002Leaf green
RAL 6003Olive Green
RAL 6004Blue green
RAL 6005Moss green
RAL 6006Gray olive
RAL 6007Bottle green
RAL 6008Brown green
RAL 6009Fir green
RAL 6010Grass green
RAL 6011Reseda green
RAL 6012Black green
RAL 6013Reed green
RAL 6014Yellow olive
RAL 6015Black olive
RAL 6016Turquoise green
RAL 6017May green
RAL 6018Yellow green
RAL 6019pastel green
RAL 6020Chrome green
RAL 6021Pale green
RAL 6022Brown olive
RAL 6024Traffic green
RAL 6025Fern green
RAL 6026Opal green
RAL 6027Light green
RAL 6028Pine green
RAL 6029Mint green
RAL 6032Signal green
RAL 6033Mint turquoise
RAL 6034Pastel turquoise
RAL 6035Pearl green
RAL 6036Pearl opal green
RAL 6037Pure green
RAL 6038Luminous green
RAL 7000Squirrel gray
RAL 7001Silver gray
RAL 7002Olive gray
RAL 7003Moss gray
RAL 7004Signal gray
RAL 7005Mouse gray
RAL 7006Beige gray
RAL 7008Khaki gray
RAL 7009Green gray
RAL 7010Tarpaulin gray
RAL 7011Iron gray
RAL 7012Basalt gray
RAL 7013Brown-grey also NATO-olive, Stone-grey-olive
RAL 7015Slate gray
RAL 7016Anthracite gray
RAL 7021Black gray
RAL 7022Umbra gray
RAL 7023Concrete gray
RAL 7024Graphite gray
RAL 7026Granite gray
RAL 7030Stone gray
RAL 7031Blue gray
RAL 7032Pebble gray
RAL 7033Cement gray
RAL 7034Yellow gray
RAL 7035Light gray
RAL 7036Platinum gray
RAL 7037Dusty gray
RAL 7038Agate gray
RAL 7039Quartz gray
RAL 7040Window gray
RAL 7042Traffic gray A
RAL 7043Traffic gray B
RAL 7044Silk gray
RAL 7045Telegrey 1
RAL 7046Telegrey 2
RAL 7047Telegrey 4
RAL 7048Pearl mouse gray
RAL 8000Green brown
RAL 8001Ocher brown
RAL 8002Signal brown
RAL 8003Clay brown
RAL 8004Copper brown
RAL 8007Fawn brown
RAL 8008Olive brown
RAL 8011Nut brown
RAL 8012Red brown
RAL 8014Sepia brown
RAL 8015Chestnut brown
RAL 8016Mahogany brown
RAL 8017Chocolate brown
RAL 8019Gray brown
RAL 8022Black brown
RAL 8023Orange brown
RAL 8024Beige brown
RAL 8025Pale brown
RAL 8028Terra brown
RAL 8029Pearl copper
RAL 9001Cream
RAL 9002Gray white
RAL 9003Signal white
RAL 9004Signal black
RAL 9005Jet black
RAL 9006White aluminum
RAL 9007Gray aluminum
RAL 9010Pure white
RAL 9011Graphite black
RAL 9016Traffic white
RAL 9017Traffic black
RAL 9018Papyrus white
RAL 9022Pearl light gray
RAL 9023Pearl dark gray
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