Special profiles are basically sections with a shape or set of properties that differ from those of general-use, universal rolled steel. Special profiles are used for specific operating conditions, which, in fact, determine their design, as well as physical and mechanical properties. Special metal profiles are manufactured from carbon, alloyed and stainless steels, aluminium, copper and other non- ferrous metals and alloys.
Classification and application of special steel profiles
Special steel profiles are mainly classified based on the industry they are used in. Some examples of such products are listed below:
Industry |
Product |
Example of product |
Standard for technical requireme nts |
Application |
Steel grades |
Metals and mining |
U-channel posts (SVP) |
SVP 19, SVP 22, SVP 27, SVP 33 |
GOST 18662, DSTU 8770 |
Mine roof supports |
St5ps, 20G2АF |
Sections for side plates of drag conveyor pans |
SP190, SP205, SP228, SP230, SP245, SP255D |
TU U 27.1- 26524137- 1355:2007 |
Manufacture of mining equipment |
25GSRD, 25ХGSR, 25ХG2S RF |
|
Shaped profiles for lining grinding mills |
Lining profiles |
TU U 27.1- 4-513-2001 |
Lining inner walls of grinding installations |
70GF |
|
Round bars for mill rods |
Grinding rods |
ТU 14-1- 1586- 2006; customer’ s requirements |
Grinding bodies for tumbling mills |
K76, 70G |
|
Machine building |
Z-profiles for centre girders |
Z310 |
GOST 5267.0,GOST 19281, DSTU 8541 TU 14-1- 5391-99 DSTU 8391 |
Manufacture of centre girders for rail cars |
09G2S 12G2FD |
Hot-rolled strip |
Strip: width range 30-90 mm, thickness range 3-20 mm |
EN 10025, ASTM A36/ A36M, ASTM A6/A6M,GOST 535, DSTU 4484, GOST 7419, GOST 14959, DSTU 8429 |
Manufacture of stamped nuts, carriage springs, agricultural equipment components, blades and other applications |
S235JR, S275JR, S355JR, St3sp, St3ps,65G, 45, 50, ASTM A36, 30MnB5 , 65, 70, 75, 80, 60G, 70G, 55S2, 55S2А, 60S2, 60S2А |
|
Special hot- rolled steel profiles for petrochemical machine building |
Steel strip (type 1), special profile (types 2 and 3) |
DSTU 3665, GOST 30565 |
Manufacture of aluminium and diaphragm cells, as well as coke oven door sealing frames |
St0, St1kp, St1ps, St1sp, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp |
|
Profiles for elevator guide rails |
#3, #3а |
ТU U 27.1- 26524137- 203-2005 |
Manufacture of passenger and cargo elevators |
30 |
|
Shipbuilding |
Symmetrical hot-rolled bulb flat for shipbuilding |
935, 1035, 1235, 1446, 1447, 1455, 1646, 1658, 1858, 2068, 22610, 271010, 30810, 30812 |
GOST 5521, GOST 9235 |
Manufacture and repair of sea and river vessels |
A, B, D, E, A32, D32, E32, A36, D36, E36, A40, D40, E40, A27S, D27S, E27S, A40S, D40S, E40S |
Asymmetrical hot-rolled bulb flat for shipbuilding |
5, 5,5, 6, 7, 8, 9, 10, 12, 14а, 14б, 16а, 16б, 18а, 18б, 20а, 20б, 22а, 22б, 24а, 24б |
GOST 5521, GOST 21937 |
Special steel profiles are also extensively used in the construction (sheet piles and I-beams, unequal channels and other profiles), automotive (strip for caterpillar chains, truck wheel rims) and other industries.
Manufacture of special steel profiles
Special profiles are manufactured by section or specialised mills using hot or cold rolling as a process.
The main rolling processes include:
- Longitudinal rolling on light to medium and heavy section rolling mills is used for most steel sections and shapes. During the longitudinal rolling, the rolls rotate in various directions, take in the feedstock, deform it and transfer in the direction transverse to their axles. This is the process used to manufacture rails, Z-profiles, bulb flats, pit props, round profiles for mill rods, steel for elevator guide rails and other types of special profiles.
- Transverse rolling is used to manufacture special profiles that, due to their shape, are solids of revolution (balls, axles, pinions, shafts, etc). During the transverse rolling, the rolls rotate in the same direction to rotate the feedstock and then deform it in the transverse direction. Reducing the feedstock head and forming it to the required cross-sectional shape is possible by profiling rolls and changing the roll gap.
Also, some types of special profiles (Z-type equal and unequal profiles, С-profiles, U-profiles and other profiles) can be manufactured by profiling the strip on roll- forming machines. In this case, the production process implies sequentially profiling steel sheets by rollers and rolls without changing the strip thickness. This makes it possible to manufacture shaped products by balancing metal distribution across its cross-section and reducing the loss of metal, which, in turn, helps to reduce the cost of downstream processing and manufacture of new goods.
Buy special profiles from the manufacturer
Enterprises of Metinvest Group produce a wide range of special profiles for the mining and steel industry, construction, and general and special-use machine building. Special profiles are produced from carbon and alloy steel grades in accordance with the requirements of national and interstate standards, as well as to the customer’s technical specifications. Special profiles can be purchased through the Group’s global sales network of 38 sales offices in Europe, Asia, Africa and North America, as well as 16 metal service centres in Ukraine and authorised dealers.
Get in touch
Find the nearest office
Subscribe to our newsletter