Dimensions of the metal corner. Visual tables. Weight 1 meter.

The parameters of one of the most popular types of rolled metal - steel equal-flange angle - are determined by GOST 8509-93. The use of GOST in the production of such products not only unifies their types, but also improves the interaction between producers and consumers. The dimensions and weight of equal-flange steel angles, which are manufactured in full compliance with the regulatory document, make it possible to use these characteristics to accurately calculate material consumption, which is very important when carrying out construction and repair work.

Photo of equal-flange steel angle

Varieties of equal-flange steel angles

Equal angle corners are divided into several categories depending on the manufacturing method and the raw materials used for their production. All geometric parameters, as well as permissible deviations for them, are regulated by two regulatory documents:

1. GOST 8509-93 (production of hot-rolled equal-flange angles);
2. GOST 19771-93 (production of equal-flange steel angles obtained by bending).

You can familiarize yourself with the GOST requirements and the range of hot-rolled and bent equal-flange steel angles by downloading the relevant documents in pdf format from the links below.

GOST 8509-93 Hot-rolled equal flange steel angles. Assortment

GOST 19771-93 Equal-flange bent steel angles. Assortment

The difference between equal-shelf and unequal-shelf products is that the former have shelves of the same dimensions (width), while the latter have different shelves. Hot-rolled corner profiles are manufactured using the following technology: a hot billet is rolled between the shafts of a special rolling mill, where, under pressure, it is formed into a product with the required geometric shape and dimensions.

In order to produce a metal corner of the bent type, rolled sheets of the appropriate size are bent on roll forming equipment or on pipe mills. Due to the peculiarities of their production, hot-rolled profiles are characterized by higher strength, but bent corners also have their advantages: high dimensional accuracy, light weight, wide range.

Equal angle corner is a popular material both in industrial construction and in private households

The range of equal angle angles includes products from:

• high strength steel;
• alloyed, high-alloy steel;
• alloys characterized by increased heat resistance, heat resistance and corrosion resistance.

The most common material for the production of bent angles is also carbon steel, the characteristics of which must comply with GOST 380-94.

Hot rolled equal flange steel angles according to GOST 8509-93

This table presents the geometric characteristics of hot-rolled steel equal-flange angles

Main characteristics

Using the assortment table for equal-flange steel angles, you can find out their various parameters: weight of one linear meter; profile cross-sectional area and other dimensions. To calculate the mass of a hot-rolled or bent profile, the density of the material from which it is made is taken as 7850 kg/m3.

Weight per linear meter of equal angle angle

The radii of curvature of the profile of equal-flange steel angles, given in the table with the assortment, are not controlled parameters, but they are necessary for calibrating products. In the assortment table, the following designations of sizes and other parameters that characterize steel angles are used:

• t – shelf wall thickness;
• X0, Y0 – distances from the outer edges of the corner flanges to its center of gravity;
• R – radius of curvature;
• b – shelf width;
• r – radius of curvature of the edges of the shelves;
• I – moment of inertia;
• i – radius of gyration;
• F – profile cross-sectional area;
• Ixy is the moment of inertia that is developed by centrifugal forces.

Designations of the main geometric parameters of hot-rolled angles. Below is a table of the assortment of this type of rolled metal

Table 1: Range of hot-rolled angles

Equal-flange steel angles can be of normal precision (marked with the letter “B”) and high-precision (marked with the letter “A”). GOST allows the following deviations in the width of shelves:

• for products No. 2–4.5 – ±1 mm;
• No. 5–9 – ±1.5 mm;
• No. 10–15 – ±2 mm;
• No. 16–20 – ±3 mm;
• No. 22–25 – ±4 mm.

The corner flanges must be perpendicular to each other within the tolerances according to the table

The thickness of the flange of an equal-flange steel angle in accordance with GOST may have the following deviations, measured in millimeters (see table).

The customer of a batch of equal-flange steel angles can agree with the product manufacturer that instead of permissible deviations in wall thickness, a tolerance for deviations in the mass of the product will be used, which can be for profiles:

• No. 2–7.5: from –5 to +3% (classes “A” and “B”);
• with No. over 7.5: ±2.5% (class “A”), from – 5 to +3% (class “B”).

Deviations in corner sizes depending on class

According to the provisions of GOST, steel angles belonging to the category of equal flanges can be supplied to the customer with a length of 3–12 m. By prior agreement between the customer and the manufacturer, these products can be supplied with a length exceeding 12 meters. Thus, GOST stipulates the possibility of tempering equal-flange steel angles of the following sizes in the longitudinal direction:

• measured length;
• measured size with the inclusion of products of unmeasured length in the batch (the number of such corners should not exceed 5% of the total volume);
• length, which is a multiple of the measured length;
• a length that is a multiple of the measured length, when the batch contains angles of unmeasured length (their number should not exceed 5% of the total volume);
• unmeasured length;
• length, located in an unmeasured interval.

An educational video from Soviet times, covering in detail the nuances of the production of long rolled metal products.

For the length of measured steel angles and products whose length is a multiple of the measured length, GOST establishes the following permissible deviations:

• no more than 4 meters – 30 mm;
• from 4 to 6 meters – 50 mm;
• over 6 meters – 70 mm;
• from 4 to 7 meters (at customer’s request) – 40 mm;
• over 7 meters (by prior agreement with the customer) - 5 mm for each additional meter of product.

How a corner is made - differences in products

Many uses have been invented for the standard L-shaped profile of a steel corner, which is understandable - the bending point is at the same time a stiffening rib and a convenient shape for laying corners on other surfaces. A popular type of rolled product is made mainly from ordinary carbon steel, less often from high-quality structural steel. Over the years, the production of steel angles has acquired many GOSTs, for example, general requirements and characteristics for the product are present in GOST 19771-93, while each type and method of rolling has its own separate GOST.

Hot rolled angle is produced by rolling a bloom (an ingot of metal) through a series of rotating shafts that apply the required pressure to the hot metal. During the movement, an L-shape without a radius on the outside is also formed. There is a radius on the inside - it plays the important role of an additional stiffener. According to GOST 8509-93, maximum deviations from the length of angles on sale should be no more than 0.75% of those declared by the manufacturer, and the curvature coefficient should be no more than 0.4% of the length.

The technology of cold-rolled production is significantly different - basically, angles are made from metal strips (ordinary steel) on roll forming machines, or strip blanks are rolled through a series of shafts. Due to their higher cost, such products are not suitable for creating load-bearing and monolithic structures; their scope of application is limited mainly to finishing work. The range is represented by products from 6 to 12 meters. Externally, it is very simple to distinguish cold-rolled products from hot-rolled ones - the former do not have the scale characteristic of the latter.

Advantages and disadvantages of hot-rolled angles

Hot rolled steel has a number of advantages, which include:

• scope of application – including at large enterprises for bulk and regular orders;
• Sizes are not limited;
• performance characteristic - maximum speed;
• Products with thick walls can be processed.

In addition to the advantages, hot rolled steel also has several disadvantages. Firstly, the high cost of equipment. Secondly, installing such equipment will require a large amount of free space.

Characteristics of isosceles angles

High-precision steel, alloy metal or stable, heat-resistant compounds are used as raw materials for production.

The advantage is the affordable price, as well as the versatility of quality and wide scope of application. Moreover, such products are resistant to corrosion processes, do not deform, are not exposed to temperature and are well welded.

• Welding of metal structures
• Features of cold rolled sheets - production technology, features, dimensions, properties and markings
• Technical features of hot-rolled sheet - classification, manufacturing method, application options and processing features

Metal corners can be used for fastening, in mechanical engineering, installation of metal structures, for monolithic structures, in agriculture.

Equal corners are an excellent option for stairs.

The corner can be made from non-ferrous metals, for example, aluminum or magnesium products. Moreover, the corners made of non-ferrous metal will be pressed or bent.

Steel angle - strictly according to GOST

Based on the cross-sectional type, products are divided into equal-flange and unequal-flange. The shelf of an angle is one of its sides, to put it in plain language. Equal-sex ones, as the name suggests, have identical shelves, which cannot be said about unequal-sex ones. The range of the latter is limited and is often made to order.

The shelf width varies from 20 mm to 200 mm, the metal thickness reaches a maximum of 16 mm. The weight of a steel angle is measured in kilograms per meter, for example, for an equal-flange product with a shelf width of 20 mm and a metal thickness of 3 mm, the weight will be 0.890 kg/m. For the largest representative of this family - a two-hundred-millimeter product - with a thickness of 12 mm, the weight will be about 37 kg/m.

According to the accuracy class, corners are divided into high-precision products, also known as class A, and ordinary accuracy, class B. Products are numbered depending on the width of the shelf, which is measured in millimeters. The standard length of products is from six to twelve meters, this is not counting the unmeasured length, the minimum value of which is 4 meters. When producing large batches of a strictly defined size, according to GOST, 15% of oversized products are allowed.

GOST standards specifying the assortment of equal angle angles

In addition to such parameters as the manufacturing method and the geometric dimensions of the corner, specified by the product range, the mentioned products are usually divided according to the use case (this sets the requirements for the materials from which the corner is made).

The main materials for the production of this type of long products are steel:

• Ordinary quality carbon, produced according to standard 380-2005 (GOST);
• Low alloy, high strength (standard 19281-89).

For each of these types, its own standard has been developed that specifies the specifications for its production. Based on this parameter, our customers have the following available for purchase:

• Equal-flange steel angle, intended for installation of steel building structures, complying with the interstate standard of the EAEU 27772-2015 (GOST);
• Angles manufactured according to standard 19281-2014 (GOST), made of low-alloy or high-quality non-alloy steels

Manufacturing in accordance with the provisions of the standards:

• 535-2005 (GOST). Refers to products of special and general use. Manufactured from carbon steel alloys of so-called “general” quality;
• 5521-93 (GOST as amended on April 16, 2003). They are in demand, first of all, by the shipbuilding industries (alloys of increased and normal strength). A corner manufactured in accordance with standard 52927-2015 (GOST R) has a similar purpose;
• 6713-91. An angle manufactured in accordance with this standard is used in bridge construction (low-alloy structural alloys are used in its manufacture). A corner made in accordance with standard 55374-2012 (GOST R) has a similar purpose.

Equal angle corner GOST 8509-93

This rental has the following technical parameters

The maximum permissible deviations in the width of the shelf should be no more than:

• 1 mm for shelves up to 50 mm;
• 5 mm for shelves up to 100 mm;
• 2 mm for shelves up to 150 mm;
• 3 mm for shelves up to 200 mm.

Rolling accuracy can be of two types: A (high) or B (normal).

The length of the product, according to GOST, can be from 4 to 12 meters. In this regard, there are several types of length:

• Measured;
• Measured with unmeasured lengths (up to 5% of the total weight in the batch);
• Multiple dimensional;
• Multiple measured with unmeasured lengths (up to 5% of the total weight in the batch);
• Unmeasured.
• Limited within unlimited limits.

If necessary and in agreement with the manufacturer, the minimum length of the corner can be from 3 m, and the maximum - more than 12 m.

Angle angle GOST 8510-86

This standard clearly establishes the parameters of the mass of rolled products, as well as its dimensions:

The maximum permissible deviations in the width of the shelves (feather/pad) and their thickness should be no more than:

• 0/0.3 mm for shelves up to 50/32 mm;
• 5/0.4 mm for shelves up to 90/56 mm;
• 0/0.4 mm for shelves up to 160/100 mm;
• 0/0.5 mm for shelves up to 200/150 mm.

Rolling accuracy can be of two types: A (high) or B (normal).

The length of the corner according to the guest can be from 4 to 12 meters. In this regard, there are several types of length:

• Measured;
• Measured with unmeasured lengths (up to 5% of the total weight in the batch);
• Multiple dimensional;
• Multiple measured with unmeasured lengths (up to 5% of the total weight in the batch);
• Unmeasured.
• Limited within unlimited limits.

If necessary and in agreement with the manufacturer, the maximum length of the product can be more than 12 m.

Such rolled products are made from hot- and cold-rolled steel on special roll forming mills. They can also have shelves of the same or different sizes (feather and butt), so they have their own standards.

For production we use carbon steel grades of regular and high quality with a tensile strength of up to 47 kgf/mm2 and over 47 kgf/mm2

Equal flange bent corner GOST 19771-93

In terms of size and weight, bent equal-flange angles can have the following values:

Bent equal angles differ in profiling accuracy into three categories:

1. A. High accuracy;
2. B. increased.
3. B. Regular.

The length of the product, according to GOST, can be from 3 to 12 meters. In this regard, there are several types of length:

• Measured;
• Measured from unmeasured (up to 7% of the total mass in the batch);
• Multiple dimensional;
• Multiple measured with unmeasured (up to 7% of the total mass in the batch);
• Unmeasured.

The error in the width of the shelves should not exceed 0.75 mm 1.5 mm for high-precision corners and from 1.5 to 3.0 mm for products of normal precision.

Characteristics of an unequal angle

The scope of application is no less wide. Moreover, metal corners are often used as a decorative addition.

The main purpose is to use it to strengthen various structures. As well as use in the production of military equipment. Furniture metal corners are quite popular.

• Instructions on how to choose an I-beam: characteristics, dimensions, calculation of parameters and loads on the beam
• We choose VGP pipes wisely: standard sizes, selection tips and characteristics of water and gas pipes
• How to select and calculate a channel - rules of use, size tables, calculation of loads and selection of profile weight

This is interesting: Steel nitriding: process technology, equipment

I would like to name the small mass as the main advantage.

Types of metal corners

Hot rolled. It is made from a finished steel billet, which is heated and passed through a machine. And according to the dimensions that are given, the product is formed.

Bent. This type is made from a strip of steel; it can be used either cold or hot rolling, during which a bend is formed. This corner will suit any design idea.

Equal. The name speaks for itself. All sides of this angle are equal.

Unequal. This corner has different side sizes.

The metal corner has standard dimensions:

• 20x20 mm;
• 25x25mm;
• 50x50mm;
• 70x70mm;
• 75x75mm;
• 100x100mm;
• 120x120mm;
• 150x150mm;
• 200x200mm.

You can also classify metal corners by length. There are two types. This:

• Measured;
• Unmeasured.

The lengths of measuring metal corners are 6,7,9,10,11 and 12 mm. The price of this product varies not by unit, but by weight category. That is, the buyer will pay not for the quantity of products, but for its weight.

Unmeasured metal corners can have different lengths. Typically it varies from 4 to 12 mm.

Application areas of metal corners

• In homestead construction. Angular steel is used for the construction of large-sized greenhouses and small greenhouses, fences with chain-link mesh, portable and stationary gazebos.
• When constructing stairs - internal and external. The corner can be used for the manufacture of such metal products as step frames, porch platform frames, porch supports, stair railings.
• For strengthening window and door openings in brick or block masonry. The use of steel corner bars prevents the appearance of cracks in the wall and thereby extends the service life of the entire building.
• Production of canopies, street structures (benches, tables, swings), frames for bars on doors and windows, wickets, gates.
• Manufacturing of shelving in warehouses and in production , cabinet frames, trolleys, workbenches, various production equipment - testing and assembly stands.
• In everyday life - frames of metal doors, household brick stoves.

The widespread use of metal angles in construction provides the following advantages of rolled steel: a combination of strength and low weight, ease of transportation, storage and installation, durability subject to anti-corrosion treatment.