Special Steel | Product & Technology

Special Steel: High purity, high strength, and high durability

Achieving exceptional performance and value with specialized materials

Hyundai Steel’s special steel is an essential material used in various industries that require extreme strength and durability. It demonstrates exceptional performance in automotive engines, powertrains, heavy machinery components, and shipbuilding parts, providing enhanced performance with high-quality alloy steel that includes low levels of impurities and added alloying elements. Produced in various forms of bars, wire rods, and angle steel, it meets the specific needs of various industries and boasts excellent durability in environments that require high strength and wear resistance. Hyundai Steel has an annual production capacity of 1.5 million tons of special steel and meets the demands of global customers through rigorous quality control and technological innovation, providing optimal special steel solutions for future industries.

1.5 million tons
per year

Hyundai Steel supplies 70% of the special steel requirements and 99% of the steel grades needed by Hyundai Motor Group
Electric arc furnace + blast
furnace hybrid production facility

Advanced dedicated manufacturing facilities for special steel ensure stable quality and supply chain
Wide range of
steel solutions

Supplying everything from large blooms to small-sized wire rods
Customized
material innovation

Expanding mass production for new car models to support electrification with special steel materials and customer-oriented unique heat treatment

Key products

It is primarily used for components that transfer the engine’s power to the drive shaft, possessing characteristics of high strength and high durability. The types of steel vary depending on the added alloys, and they are used after processes such as forging, drawing, and heat treatment.

1.Engine
2. Transmission
3. Chassis
4. Chassis

1. Bearing
2. Drive shaft
3. Rack bar
4. Stabilizer
5. Coil spring
6. Tire cord

It is used in parts such as tractor components, employing a variety of materials ranging from alloy steels similar to those used in automobiles to carbon steels.

1.Axle
2. Engine

It is used in parts such as machine tools, employing a variety of materials ranging from alloy steels similar to those used in automobiles to carbon steels.

1. Key components
- Chuck
- Gear
- Cubic coupling

It is used not only in the engine and swivel parts of excavators but also in assembly components such as pins, bushes, and links that connect the tracks. Generally, materials with high carbon content that are highly hard and have excellent wear resistance are used.

1. Work device frame
- Cylinder rod
- Knuckle
- Tooth
2. Upper rotary body
1. Engine part
- Engine part
- Connecting rod
- Rocker arm
2. MCV part
- Spool
- Orifice
- Orifice
3.Swivel part
- Swing motor
- Swing bearing
4. Pinion gear

5. Ring gear
3. Lower running gear
1. Sprocket

2. Drive motor

3. Roller

4. Sprocket
5. Track assembly
- Rink
- Pin
- Bush

It is used in engines, shipbuilding equipment, anchor chains, etc., and materials with high hardness, corrosion resistance, and wear resistance are employed.

1. Engine
2. Shipbuilding equipment
3. Anchor chain

It is used in drill systems, mooring chains, etc., and materials with high hardness, corrosion resistance, and excellent wear resistance are utilized.

1. Drill system
2. Mooring chain

Manufacturing process

Bloom manufacturing process

Electric Arc Furnace
Process for producing molten steel by melting scrap and molten iron
LF
Heating of molten steel from the electric furnace and addition of iron alloy and subsidiary raw materials to adjust the composition of ingredients
RH
Reflux of molten steel from the LF process in a vacuum to remove oxygen and hydrogen
Bloom

Large Bar, Billet

Bloom
Break Down Mill (BDM)
Continuous Mill (CM)
Large Bar, Billet

Small Bar, BIC

Billet
Roughing Mill (RM)
Intermediate Mill (IM)
Small Bar, BIC

Wire Rod

Billet
Roughing Mill (RM)
Intermediate Mill (IM)
Wire Rod Mill
Laying Head
Wire Rod

Hynndai Steel's intergrated steelworks manufacture hot-rolled and cold-rolled coils, heavy plates, pipes, and lightweight automotive parts out of iron ore and coal. By melting lumps of raw materials, molten metal is generated in blast furnaces, after which it is purified in the steelmaking process and then goes on to the continuous casting process to make slabs that can also be hardened half-finished products. Those of slabs are thoroughly rolled at a high temperature (above 1,100℃) in order to make hot-rolled coils. After that, the cold-rolled coils are made by rolling the HRC (hot-rolled coils) at room temperature to process for final usage, which is mainly for lightweight automotive parts.

Hyundai Steel’s electric arc furnace uses steel scrap to manufacture sections, reinforcing bars, and railway rails that are used for buildings, bridges and railways. After melting the steel scrap to make molten metal, it is then smelted to eliminate impurities before proceeding to the continuous casting process to manufacture halffinished products, such as blooms and billets. These half-finished products can be rolled by reheating to increase their size as finished products, such as sections and reinforcing bars, in various sizes and thickness.

Explore product catalogs

Special Steel
KO EN
General Catalog - Part1
KO/EN
General Catalog - Part2
KO/EN