Angles

Steel angle is a very common type of steel shape used in construction, machine-building and many other areas. A steel angle is an L-shaped profile manufactured by section rolling mills or bending machines. Both structural steel (carbon, alloyed and stainless) and non-ferrous metals (aluminium, copper and other metal bearing alloys) can be used as source material to manufacture this kind of product.

Steel angles (along with other types of steel sections like channels, I-beams, rebar and others) are widely used in construction as a rigid reinforcing material for concrete monolithic elements of high-rise framed buildings, as well as for critical and wide-span support elements in industrial and civil applications. Angles are also used for door and window framing, arches and other architectural elements. In addition to the above applications, steel angles are used for room decoration, as well as in the heavy machine building and furniture industries. 

Steel angles come in a large variety of equal and unequal steel angle sizes. Depending on their production technology, they can be both hot-rolled and bent. Rolled angles have higher strength, while bent angles are used where heavy loads are not expected.

Equal angles have legs of equal length and can be effectively used for various purposes. Unequal angles, in turn, are used for non-standard applications.

Angles can have the following rolling accuracy:

• high (А);
• extra-high (B);
• normal (C).

Based on their dimensions, angles can be of cut-to-length, multiple cut-to-length or random length size. They can also have a length limit within a cut-to-length range. In addition, the angle between the legs can vary.

The width of each of the two angle legs, according to the applicable standards, varies from 25 mm to 200 mm and the thickness is a maximum of 30 mm, while the length can be made to the customer's requirements up to 12 m. To select and buy the right material, the project’s applications need to be taken into consideration.

Equal angles

According to the standards, hot-rolled equal steel angles are manufactured with a length of 4-12 m. They can be of cut-to-length, random length and multiple cut-to-length size, or have a length limit within the random length range. Such products are manufactured according to the following standards, among others: CIS standards from the St3sp, St3ps, 09G2S, 09G2SD and 15HSND steel grades; European standards from the S235JR, S275JR, S355JR, S355J0 and S275J0 steel grades; and US standards from the ASTM A36 / A36M and Grade 50 steel grades.

Steel angle range – CIS standards

These standards are followed to manufacture goods from the following steel grades: St3sp, St3ps, 09G2S, 09G2SD and 15HSND, among others. The size of angle legs varies from 20*20 mm to 250*250 mm, and their thickness varies from 3 mm to 35 mm. The harmonised European standard DSTU EN 10025-2 is now also applicable in Ukraine, which is used to manufacture angles with the strength parameters of the S235, S275 and S355 steel grades.

Steel angle range – European standards

In Europe, one main standard – EN 10025-2 – sets forth the requirements for application and technical features of several steel grades, including S235JR, S235J0, S235J2, S275JR, S275J0, S275J2, S355JR, S355J0 and S355J2. The key standard with respect to angle dimensions and tolerances is EN 10056, which approves the manufacture of equal steel angles with dimensions from 20*20*3 mm to 250*250*35 mm.

Steel angle range – US standards

In the US, ASTM A6 / A6M is the main standard defining specifications for steel sections, while several standards are in place with respect to steel grades, the most common of which are ASTM A36 / A36M and ASTM A529 / A529M. The standard size range is from 19*19*3.2 mm to 305*305*34.9 mm.

Unequal angles

Unequal hot-rolled steel angles are used for load bearing unidirectional force steel structures, which makes it possible to significantly reduce weight without affecting the load-bearing capacity as compared with equal angles. The main standards for technical specifications applicable in the CIS and Ukraine with respect to unequal angles include DSTU EN 10025-2, GOST 535, GOST 6713, GOST 19281 and DSTU 4484, while the primary steel grade standards are GOST 380, GOST 6713, DSTU 19281 and DSTU 2651.

These standards relate to such steel grades as S235JR, S235J0, S235J2, S275JR, S275J0, S275J2, S355JR, S355J0, S355J2, 3ps, 3sp, 15HSND, 09G2S and 09G2SD, among others. The sizes of angle legs vary from 25*16 mm to 200*150 mm, and the thickness varies from 3 mm to 16 mm.

Carbon steel, quality low-alloy and alloyed steel grades are used to produce steel angles. Hot-rolled steel angles are manufactured from steel billets or blooms, while bent angles are made of steel coils cut into strips of the required width.

Depending on application or specific operating conditions, angles can have a protective coating, such as zinc coating, impact resistant paint (powder technology) or polymer-based film. They can also have fire protection. While additional options help to improve the functional properties of the finished goods, they also make the price higher.

Buy steel angles from the manufacturer

Metinvest’s enterprises produce a wide range of equal and unequal angles for construction applications, as well as general and special-use machine building. Products are manufactured from carbon and low-alloy steel grades in accordance with the requirements of key Ukrainian, European, US and CIS standards.