Stainless steel is an alloy steel that is resistant to corrosion in aggressive environments and atmospheres. This type of steel is divided into three groups: corrosion-resistant, heat-resistant and heat-resistant. These groups are specially divided to solve certain problems.

So, corrosion-resistant steels are used where high resistance of materials to corrosion is required, both in domestic conditions and in industrial work. Heat-resistant steels are used in situations where good resistance of the material to corrosion under the influence of high temperatures, for example, on chemical plants. Heat-resistant steels - where high mechanical strength is required at high temperatures.

When working with stainless steel, it is extremely important to know the quality index. To help determine this parameter, such a characteristic as the specific gravity of stainless steel will help.

Table of specific gravity of stainless steel

Below is a table of values ​​\u200b\u200bthat will help you to carry out all necessary calculations when working with stainless steel, including the weight of the stainless steel.

Specific Gravity Calculations

In order to carry out all the necessary calculations, it is necessary to determine the very concept of this characteristic. So, specific gravity is the ratio of weight to volume of the desired material or substance. Calculations are carried out according to the following formula: y=p*g, where y is the specific gravity, p is the density, g is the gravitational acceleration, which in normal cases is a constant and equals 9.81 m/s*s. The result is measured in Newtons divided by a cubic meter (N / m3). To convert to the SI system, the result is multiplied by 0.102.

Density is the value of mass required material or a substance measured in kilograms that fits in a cubic meter. It is a very ambiguous value, which depends on many factors. For example, temperatures. So, the density of stainless steel is 7950 kg/m3.

At the present time, pipes are sold not by footage, but by tons. But how can you still calculate the required number of pipes with the required diameter? We will tell you about this in this article, which after reading to the end, everything will immediately become clear.

• The specific density of certain grades of steel billets;
• Product diameters;
• wall thickness;
• Running meters.

Specific Gravity: Weight Correspondence Chart

In order for you to understand everything, we give for example a table with popular brands of stainless steel products with characteristics.

Tip: For accurate specific gravity, ask for help from experts who will quickly resolve all issues for you.

Electrowelded profile pipes GOST 11068-81

1. They supply liquids, gases, heating, for work at a construction site.
2. in the oil and gas production, for the pump chemical industries. For such according to GOST 10704 91.
3. In industries where resistance to pressure drops and high temperature conditions is required. Galvanized oval pipes with a wide density and a small diameter are also used.
4. In the field of geological exploration at the site of oil wells.
5. The structure of wagons, machines, in the manufacture of equipment for construction and repair. Here, products with thin walls and a length of no more than are widely used.
6. For mechanical engineering.

GOST 11068 81 is not only the above parameters and characteristics, in order to calculate the density of steel and the weight of a stainless pipe, find a complete list of standard and non-standard products in books or on the pages of Internet sites.

As for the length, they are unmeasured, but not higher than in the provided GOST table, the allowable deviation is 1.5 cm. If the customer agrees with the manufacturers, it is provided that the length of the manufactured pipe is exceeded by dimensions larger than indicated.

The end of each product is cut according to a right angle and cleaned from chips, small chamfers may be present. Upon agreement between the consumer and the customer, special chamfers are applied to the ends of the pipes, allowing several products to be welded together.

Each hot-formed pipe is manufactured in accordance with GOSTs and standards, all the requirements specified in technical regulations, and approved in the prescribed manner. For production purposes, it takes only those steel grades that are indicated in the table, do not use metals with chemical additives.

The outer and outer surface of a seamless hot-formed product is tested by temperature, withstands more than 350 C, and only after that it is sent for sale. If a captivity, a sunset, a crack or a torn place with defects is noticeable on the surface, it is recycled with the elimination of all damage. The diameters and wall thickness of the pipes must comply with GOST 11068 81.

How to calculate the weight of a stainless pipe 12 x 18n 10t using formulas: a linear meter of material measuring 1 meter

With the right amount of data, we can quickly and easily calculate the weight of stainless steel.

It is equal to the volumetric weight of steel and density. To find out the approximate volume, multiply the area of ​​the stainless pipe by the surface equal to the diameter and wall thickness.
For example:

1. We take pipes made of steel, the wall diameter of which is 100 millimeters;
2. Their length is 10,000 millimeters;
3. Specific gravity of steel 7900
4. 7900 * 100 mm * number P 3.14 * 10,000 mm = 24.8 kg.

As practical measurements show, this pipe weight calculation is not 100% accurate, as there may be adjustments on a round surface. The weight calculation formula is a bit simpler:

The weight of the outer diameter is the wall thickness * wall thickness * 25 g \u003d 1, which is the weight, or even simpler:

(diameter-thickness)*wall thickness*25g= . Tip: when calculating using different formulas, you may encounter different values, but the difference in them will be small, which can be completely neglected. It is better that the weight of stainless steel be bought with a margin that will be lost during processing or cut off.

Popular sizes of profile pipes are:

1. Side length 1.5 by 1.5 cm, wall thickness 0.01, 0.015 and 0.02 cm - weight 0.48 to 0.91 kg / mm
2. DC 2 by 1.5 cm - TS 0.015 and 0.02 cm, weight 0.9-1 kg / mm.
3. DC 2 by 2 cm - TS 0.01, 0.015 and 0.02 cm - B 0.63-1.22 kg / mm.
4. DC 2.5 by 1.5 -TS 0.01, 0.015 and 0.02 cm - B 0.6-1.22 kg / mm.
5. DC 2.5 to 2.5 -TS 0.01, 0.015 and 0.02 cm - B 0.78-1.5 gc / mm.
6. DC 3 by 2 cm - TS 0.015 and 0.02 cm - B 1.2-1.49 kg / mm.

For a broader concept of a dimensional grid, which indicates the length of each side, wall thickness, we recommend that you familiarize yourself with sites on the Internet where there are complete list quantities.

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We hope the article was useful for you and before buying you will calculate the correct amount, which will not cause you any hassle and unplanned waste. The density of stainless steel is always needed to calculate the weight of a stainless pipe.

Stainless steel sheet

Stainless steel sheet

Stainless (alloyed) Sheet steel It is resistant to all types of corrosion, due to which its use allows reducing the weight of metal structures, extending the service life of objects and significantly reducing the cost of their operation and maintenance.

Moreover, it should be distinguished that not all corrosion-resistant and heat-resistant steel grades are stainless. Stainless alloys include alloys containing alloying additives from 10 to 50%: chromium 12-26%, nickel 8-21%, molybdenum 1-3%, titanium 0.7-0.8% (the percentage depends on the type of stainless steel: ferritic, martensitic or austenitic). Among the most popular Russian grades of stainless steels with foreign analogues are steels of the 300 series: AISI 304 (08X18H10), AISI 316 (10X17H13M2), AISI 316T (10X17H13M2T), AISI 321 (08-12X18H10T).

Types of stainless steel sheets

Alloy steel sheet is divided into hot-rolled and cold-rolled. Both types of rental are classified according to:

• rolling accuracy (A and B);
• type of edge: edged and unedged (O, BUT);
• sheet flatness group (PO, PV, PU, ​​PN).

Hot rolled stainless steel has a wide size range and affordable price, which explains the scale of demand in various areas: mechanical engineering, construction, production of equipment for food, chemical, oil refining, pharmaceutical industry and others. According to the quality of surface treatment, hot-rolled steel is produced:

• without additional heat treatment(5d);
• bright annealed / heat treated, etched (M2b, M3b, M4b, M5b).

Cold-rolled stainless steel sheets are produced with a small thickness (the maximum thickness of a cold-rolled sheet is 5 mm, when a hot-rolled sheet is ten times more - 50 mm). Through additional processing, cold-rolled steel has an improved surface quality and additional strength (as a result of reduced deformation stresses). According to the type of surface treatment, cold rolled steel is:

• cold-worked (H1);
• semi-hardened (PN1);
• etched or processed by light annealing (M2b, M3b, M4b, M5b).

Thickness of rolled sheets made of corrosion-resistant and heat-resistant steel grades

Rolled stainless steel sheet is available in thin and thick sheets.

Sheet metal made of alloyed steel grades in accordance with the technical specifications according to GOCT 5582-75. Standard range of sheet steel thicknesses:

• hot-rolled from 1.5 to 3.9 mm in increments of 0.1; 0.2; 0.3 mm;
• cold-rolled from 0.5 to 3.9 mm in increments of 0.05; 0.1; 0.2; 0.3 mm.

Plate stainless steel manufactured according to specifications according to GOCT - 7350-77. Standard range of alloy steel plate thicknesses:

• hot-rolled from 4 to 50 mm in increments of 0.5; 1; 2; 3 mm;
• cold-rolled from 4 to 5 mm in increments of 0.2 and 0.3 mm.

Sizes of stainless steel sheets

The size range and permissible limit deviations for stainless steel sheets are set depending on the thickness of the sheet (plate or thin sheet steel) and the method of production (hot-rolled or cold-rolled steel).

The size range of hot-rolled stainless steel is regulated by GOCT 19903 (for thicknesses defined by GOCT 7350-77 for thick plate and GOCT 5582-75 for thin sheet steel).

Sizes of stainless steel sheets
hot-rolled plate
steel according to GOCT 19903

Sizes of stainless steel sheets
thin sheet hot-rolled
steel according to GOST 19903

The size range of cold-rolled stainless steel, as well as hot-rolled, depends on the standard thicknesses and production method: the thickness range is regulated by GOCT 5582-75 (for thin sheets) and GOCT 7350-77 (for thick sheets), and the standard dimensions of the length and width of the sheet, depending from thickness, GOCT 19904 is established. Moreover, the range of the range of cold-rolled steel is significantly inferior to the range of hot-rolled:

• for thin-sheet rolled products, the width of the sheet is set in the range from 500 to 1800 mm, the length is from 1000 to 6000 mm;
• for thick rolled products, sheet width from 1250 to 2350 mm, length from 2000 to 4750 mm.

Weight of stainless steel sheet

The weight of a sheet of any size of stainless steel of a certain grade is calculated by the formula:

M = ρ×a×l×h, where:

• M - desired weight, kg;
• ρ - specific gravity of stainless steel, g / cm³, tabular value;
• a - sheet width in meters (m);
• l - sheet length in meters (m);
• h - sheet thickness in millimeters (mm).

For example, a hot-rolled thick sheet made of steel grade 08X18H10T (ρ = 7.90 g / cm³), 1420 mm wide, 6000 mm long and 4 mm thick will weigh:

M = ρ × a × l × h = 7.90 × 1.42 × 6 × 4 = 269.232 kg

Reference values
share for some
alloyed steel grades

The use of stainless steel today is very common in many industries. Among them are the construction of buildings, both industrial and residential. Automotive, aircraft and shipbuilding also cannot do without the use of this metal. The price of steel sheets and pipes on sale is always indicated per kilogram.

When conducting construction works it is necessary to calculate the weight not only in order to acquire the required amount of material, but also to determine what the load on the support will be.

The specific gravity of stainless steel is the main characteristic of the metal, which allows you to make the necessary calculations. Knowing this parameter, you can use special calculators and programs to determine the mass of the material. The specific density of steel is from 7700 to 7900 kg/m3.

We calculate the mass of the pipe

• length;
• diameter;
• thickness;
• specific gravity.

Using the tables, you can choose the required ratio of the length and diameter of the pipe. And you can calculate the mass of the product by multiplying its volume by its density. Accordingly, to calculate the volume, it is required to multiply the value equal to the wall thickness by the surface area. In this case, the area is defined as the product of the number "pi", the length of the pipe and its diameter.

For example, if you want to determine how much steel pipe brand 12x18n10t, the length of which is 10m, the diameter is 10 cm, and the wall thickness is 1 mm, the calculation procedure will be as follows:

• the specific gravity value of 7900 is multiplied by the diameter: 7900*0.1=790;
• multiply by the length and thickness of the wall: 790*10*0.001=7.9;
• multiply by the constant value "pi": 7.9 * 3.14 \u003d 24.81 (kg).

However, these calculations may not be very accurate. This is determined by the round surface of the pipe.

You can also use another formula, it is a more simplified version and is used to calculate the running meter of the product.

To determine the mass, you need to subtract from the value that determines the diameter of the product, the wall thickness. The field of which the obtained value is multiplied by the wall thickness and by the value of 0.025. In general, the formula has the following form:

1 p. m. \u003d (D-T) * T * 0.025

Then a linear meter of the same pipe will weigh 2.475 kg. Although the difference in the numbers obtained is negligible, a little more material should be purchased than was calculated, taking into account the cost of cutting and processing.

sheet material

It should also be borne in mind that stainless steel includes a large group of grades of this metal. The most common brands are: 12x18H10T, 08x18H10, as well as 12x18n12T. Foreign analogues are also popular, among them Aisi 321, Aisi 304 and Aisi 430. All these grades are characterized by a high degree of corrosion resistance, ease of processing, and high strength.

The material can be thin sheet or thick sheet depending on the type of rolled products. Thin sheets are products having a thickness of 0.5-5 mm. For thick sheets, this number is 5-50 mm.

The most common sheet sizes are 1000x2000 mm, 1250x2500 mm, 1500x3000 mm. The weight of stainless steel sheet is somewhat easier to calculate than the mass of the pipe.

To calculate the weight of a stainless steel sheet, multiply the value of height, thickness and width. In general, the required amount of material can be calculated by multiplying the mass of one sheet by the required number of sheets.

For example, the weight of stainless steel 12x18n10t for a sheet measuring 0.5x1000x2000 mm will be about 8 kg. A sheet of the same size, but with a thickness of 1 mm, will already weigh 16 kg.

To determine the mass of sheets, you can use special theoretical tables or a calculator.

Railings and fences

Stainless steel due to its properties and attractive appearance very often used to create stair railings and railings. Often, products from this metal are used by designers and architects as decorative elements. It is necessary to know the weight of structures when transporting products in order to calculate the expected load on the base of the railing. Knowing the above formulas, the calculation process is greatly simplified.

For example, the average weight of a railing or stair railing would be approximately 5-6 kg. If it is assumed that there is a glass sheet in the design of the fences, the mass will exceed 20 kg. When planning the transportation of parts, you should consider not only how much they will weigh, but also the length of the products. In the photo you can see examples of the use of this metal.