Steel Angle is a shaped rolled product with an L-shaped cross-section, consisting of two perpendicular flanges. Widely used in construction and mechanical engineering as an element for creating various metal structures.
Production Technology

The manufacturing process includes several methods:
1.    Hot Rolling: Heating a steel billet to 1100-1250°C and rolling through a system of rolls of a special profile.
2.    Bending: Cold or hot forming from sheet metal.
3.    Cutting: Cutting to measured lengths.
4.    Straightening: Eliminating deformations on straightening machines.
5.    Cooling: Natural or controlled cooling.
6.    Quality Control: Checking geometry and mechanical properties.

Characteristics and Assortment
•    Types of Execution:
o    Equal-leg (both flanges of the same width).
o    Unequal-leg (flanges of different widths).
•    Flange Sizes: from 20×20 mm to 200×200 mm.
•    Metal Thickness: from 3 to 20 mm.
•    Length: 6-12 meters (measured, non-measured).
•    Steel Grades: St3sp, St0, 09G2S, 345, 440 and others.

Advantages
•    High Rigidity with low weight.
•    Versatile Application in various structures.
•    Easy Installation and processing.
•    Resistance to various types of loads.
•    Cost-Effectiveness.
•    Good Weldability.

Areas of Application
•    Construction: building frames, trusses, supports.
•    Mechanical Engineering: frames, brackets, reinforcements.
•    Automotive Industry: body elements, frames.
•    Furniture Manufacturing: frames, supports.
•    Power Engineering: power line supports, substations.
•    Agriculture: greenhouse structures, warehouses.

Normative Documentation (GOST Standards)
Main standards regulating the production of steel angles:
GOST 8509-93 – "Hot-rolled steel equal-leg angles. Assortment"
•    Defines the assortment of equal-leg angles.
•    Establishes limit deviations for dimensions.
•    Regulates technical requirements.
GOST 8510-86 – "Hot-rolled steel unequal-leg angles. Assortment"
•    Defines the assortment of unequal-leg angles.
•    Establishes rolling accuracy parameters.
•    Regulates control methods.
GOST 535-2005 – "Rolled steel products, long and shaped, made of ordinary quality carbon steel"
•    Establishes general technical requirements.
•    Defines mechanical properties.
•    Regulates steel grades.
Additional Normative Documents:
•    GOST 380-2005 – Ordinary quality carbon steel.
•    GOST 19281-2014 – Rolled products made of high-strength steel.
•    GOST 23118-2012 – Steel building structures.
Quality Requirements:
•    Geometry: adherence to angles and straightness.
•    Surface: absence of cracks, cavities.
•    Mechanical Properties: compliance with claimed characteristics.
•    Dimensions: adherence to permissible deviations.