Automobile |

Steel for Engine

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Steel characteristics

Improvement of the durability life/ the reducing weight due to high strength/ high toughness
Improvement of the machinability

Steel products

Crank shaft steels: medium carbon Cr-Mo steel, medium carbon Mn-V steel, low carbon high strength bainitic steel
Connecting rod steels: high carbon Mn-V steel, 45kg class medium carbon micro-alloyed steel

Technology development

Alloy steels the consider high strength/toughness and machinability of bainitic steel in the crank shaft
Cost reduction of heat treatment by omitting QT heat treatment (cost-saving)
Steel for CRDI
Machinability improvement and high strengthening on the hot forging split connecting rod steel as diesel engine development has been activated

Steel for Transmission

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Steel characteristics

Improvement of the durability/weight lightening by high strength/ high toughness
Less heat distorsion

Steel products

Cr steel, Cr-Mo steel, Si-Cr-Mo-Nb steel, Cr-B-Nb steel, mild steel for gear, high temperature vacuum carburizing steel

Technology development

Developing high strength steel for cold forging to be enables various applications
Developing high temperature vacuum carburizing steel for better productivity and eco-friendly manufacturing
Developing steel with high anti-pitting fatigue strength
Developing steel for induction hardening

Steel for Chassis

Steel characteristics

Improvement of the durability/ weight lightening by high strength/high toughness

Steel products

CV-Joint steel: high carbon Mn-Cr steel, medium carbon Boron steel
Bearing steel: high carbon steel, high carbon Cr steel, low carbon carburizing Steel
Others: low carbon Cr steel, medium carbon Mn-Cr steel

Technology development

Part durability improvement and weight lightening with ultra fine grain steel through high frequency heat treatment

Spring Steel

Steel characteristics

High elasticity to return to the original shape when external load is removed
High fatigue strength to withstand repetitive load
High hot formability

Applied parts

Absorb impact effect when a vehicle is in motion: coil spring (automobile, heavy equipment), torsion bar (medium size), leaf spring (large size, commercial vehicles)
Stabilizer bar: maintain balance when vehicle is in motion or cornering

Steel products

KS : SPS5, SPS6, SPS7, SPS8
JIS : SUP9, SUP10, SUP11, SUP12
SAE : 5155, 5160, 6150, 51B60, 9254
DIN : 55Cr3, 50CrV4, 51CrMoV4

Technology development

Alloy elements added for hardenability and strength improvement
Optimize continuous casting, rolling condition for segregation reduction
Optimize rolling condition for minimizing decarbonization

Bearing Steel

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Steel characteristics

Ultra Cleanliness : ultra Cleanliness to extend maximum lifetime under the harsh operation environment
High performance: apply fatigue life, wear resistance, machinability, high hardness and thermal distortion stable
Manufacture/supply customized bearing steel according to the purpose and customer requirements

Applied parts

Through-hardening bearing steel
Case-hardening bearing steel
Bearing quality carbon steel for wheel hub
LM guide and industrial large size bearing

Steel products

STB2, STB3, SAE1055, SAE1070, SCR420H, SNCM420H, Non-normalized hub steel. etc

Technology development

Apply differentiated manufacturing technology from the raw material to the final continuous casting
Produce long life span bearing steel through controlling largest inclusion other than low sulfur/ oxygen
High frequency C-scan analysis: high reliable quality control
Apply different manufacturing technology according to the quality level to secure both economic feasibility and final product performance

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