Hot-rolled sections with a shape made for one purpose — crawler track shoes, grader and dozer blades, forklift masts, mining roof supports, wheel rims, window and door frames, sheet pile connectors. They are rolled to the customer's drawing on mills that cut their own roll grooves, and replace parts that would otherwise be machined, welded up or forged.
Also called
Special profiles
Special sections
Custom sections
Track shoe sections
Grader blades
Mining arch sections
Z-sections
Forklift mast profiles
AR
مقاطع خاصة مدرفلة على الساخن
ZH
热轧异型钢
DE
Warmgewalzte Sonderprofile
FR
Profilés spéciaux laminés à chaud
ES
Perfiles especiales laminados en caliente
IT
Profilati speciali laminati a caldo
TR
Sıcak haddelenmiş özel profiller
RU
Горячекатаные специальные профили
Main formsTrack shoe and grouser bars, cutting edges, mast profiles, mining arch sections, rim and ring sections, Z and window profiles
Typical sizesRolled to drawing; typically 0.5–100 kg/m, in fixed lengths
Main standardsCustomer drawing · EN 10025-2, EN 10083, EN 10163-3 · ASTM A6
Key gradesS355J2, boron and manganese steels for wear parts, quench-and-temper grades
Typical usesEarth-moving and mining equipment, forklifts, mining supports, automotive and rail, windows and doors
Overview
A special section is any hot-rolled profile that is not one of the standard series of beams, channels, angles, tees and bars. Where a part with a constant cross-section is needed in large numbers — the grouser bar of a crawler track shoe, the cutting edge of a grader blade, the channel of a forklift mast — rolling the shape directly is cheaper and stronger than cutting it from plate, machining it from bar or welding it from pieces.
Special sections are rolled from billets or blooms on section mills that design and cut a set of rolls for each profile. That tooling is an up-front cost, so a mill normally asks for a minimum quantity per profile — often a few hundred tonnes a year — and keeps the rolls for repeat orders. Close tolerances, sharp corners and asymmetric shapes are possible but have to be agreed against the mill's capability.
The shape is defined by the customer's drawing, and the steel by the application: weldable structural grades for frames and masts, boron and manganese steels that are quenched and tempered after cutting for wear parts such as cutting edges and track shoes, and medium-carbon steels for mining arches and support profiles. Most are delivered in fixed lengths, sometimes straightened, cut, punched or heat treated by the mill.
In the Middle East special sections reach the market mainly as parts of imported equipment and as replacement wear parts for construction and mining machinery — cutting edges, end bits and track components — supplied through dealers and wear-part distributors.
Forms & sizes
Track shoe sections
Single, double and triple grouser profiles for crawler excavators, dozers and cranes
Cutting edges and end bits
Flat and curved profiles with bolt holes for graders, dozers and loaders, in hardened boron steel
Mast profiles
Channel and I-type profiles in which forklift and telehandler masts slide
Mining sections
Arch and roof support profiles for underground roadways
Rim and ring sections
Profiles for wheel rims, slewing rings and flanged rings
Window, door and Z profiles
Light hot-rolled frame sections and Z-sections
Standards & grades
There is no dimensional standard for most special sections: the customer's drawing is the specification, with the steel grade and the general delivery conditions taken from the standards below.
Local Steel Mills · Coil Service Center · Stockist - Distributor · Ras Alkhaima
