Cold-Rolled Steel
Cold-rolled steel begins as hot-rolled steel that undergoes chemical treatment (pickling process) to remove surface scale, then is rolled at room temperature to achieve the desired thickness, material properties, surface finish, and shape as specified by our customers.
Dongkuk Industries' cold-rolled special steels are used in precision component materials such as high-carbon steels and specialty steel alloys for automobiles, embodying sophistication, diversification, and enhanced functionality. We possess the most advanced cold-rolled specialty steel facilities, producing top-quality products through precise control of the latest equipment and precise shape control. We supply products responsible for life, including significant engine materials, Auto-Transmission Parts materials, and automotive interior Safety Parts to the world.
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| Types | JIS | SAE | DN | ||
|---|---|---|---|---|---|
| Steel for Machine Structural Use (Automotive Parts) |
Low Carbon Steel | SPCC-1B, SPCC-2B, SPCC-4B, SPCC-8B, SPCC-SB, S20C |
1004, 1010, 1020 | ||
| High Carbon Steel | S35C, S45C, S50C, S53C, S55C | 1035, 1045, 1050, 1055 | CK75M2, CK75M3 | ||
| Alloy Steel | Ni-Cr-Mo | SNCM220 | 6150M, 8660M | ||
| Cr-Mo | SCM415, SCM430, SCM435 | ||||
| Others | SUJ2 | 1552 | 50CrV4, 51CrV4, 58CrV4, 16MnCr5, 100Cr6 | ||
| Tool Steel (Industrial Use) |
High Carbon Steel | S60C, S65C, S70C, SK60, SK85, SK95, SK105, SK120 | 1060, 1065, 1070, 1074 | ||
| Alloy Steel | Ni-Cr-Mo | 8660M | |||
| Ni-Cr | SKS51 | ||||
| Cr-Mo | AISI4140, AISI1536 | ||||
| Cr | SKS81 | ||||
Pickled & Oiled Coil (PO)
(mm)
| Thickness | Width | Capa. |
|---|---|---|
| 1.2 ~ 10.0 | 600 ~ 1,400 | 300,000 MT |
* PO Product Capa. : 200,000 MT
Cold Rolled Coil (CR)
(mm)
| Thickness | Width | Capa. |
|---|---|---|
| 0.10 ~ 0.14 | 9 ~ 420 | 360,000 MT |
| 0.15 ~ 6.40 | 9 ~ 1,320* | |
| 6.50 ~ 8.00* | 120 ~ 650* |
* Detailed discussion required
Oscillating Coil
(mm)
| Thickness | Width | Capa. |
|---|---|---|
| 0.3 ~ 2.5 | 15 ~ 65 | 9,000 MT |
Mini Shear Line
(mm)
| Thickness | Width | Capa. |
|---|---|---|
| 1.2 ~ 6.0 | 100 ~ 600 | 11,400 MT |
Engine parts for automotive
Gasket
SPCC
Timing Chain
SAE1050M
SAE1055M
SAE1070M
SAE1552M
Tappet
SCM415
Rocker Arm
16MnCr5
Transmission parts for automotive
Drive Plate
S35C
S55C
SK85
Torque Converter
SPHC
SAPH440
Detent Spring
SK85
51CrV4
Wave Spring
SAE1070
SAE1074
SK85
Transmission Band
S35C
S45C
Friction Plate
SPCC
SAE1020
S35C
S45C
S55C
Plate Stop
SK85
50CrV4
Separate Plate
SPCC
S20C
Clutch parts for automotive
Clutch Diaphragm
SK85
50CrV4
51CrV4
58CrV4
Clutch Diaphragm
SK85
50CrV4
51CrV4
58CrV4
Cushion Plate
S70C
SAE1070
SK85
Cushion Plate
S70C
SAE1070
SK85
Bearing parts for automotive
Bearing Cage, Cup
SCM415
Bearing Cage, Cup
SCM415
Thrust Needle Bearing Retainer
SPCC
Thrust Needle Bearing Race
SK85
CK75
Interior and exterior parts for automotive
Door Latch
S45C
SCM415
SCM435
SNCM220
Snap Ring
S45C
S50C
SK85
Hose Clamp
S60C
S65C
S70C
SAE1074
50CrV4
51CrV4
Clip
S50C
SK85
51CrV4
Washers
S45C
S50C
S60C
S65C
S70C
SAE1074
SK85
Safety belt parts for automotive
Safety Belt Case
S45C
SPFC590
SCM430
Safety Belt Case
S45C
SPFC590
SCM430
Seat Belt Height Adjuster
S45C
S50C
S55C
SPFC590
SPFC780
SCM430
AISI4140
Seat Belt Height Adjuster
S45C
S50C
S55C
SPFC590
SPFC780
SCM430
AISI4140
Tongue
S50C
S55C
C60E
SAE1060
Safety Belt Anchor & Bracket
S45C
S50C
S55C
Lock Gear & Lock Plate
S45C
S55C
Safety Belt Spring
SAE1074
SK85
Safety Belt Base & Buckle Frame
S50C
S55C
C60E
SPFC590
SCM430
SCM440
Seat / Seat rail parts for automotive
Seat Recliner
SPCC
Seat Rail
SAE1050M
SAE1055M
SAE1070M
SAE1552M
Seat Parts Upper tooth & Lower tooth
S45C
SCM415
SCM435
SNCM220
Seat Parts Upper tooth & Lower tooth
S45C
SCM415
SCM435
SNCM220
Industrial use
Shank
SK85
SCM430
SCM435
Shank
SK85
SCM430
SCM435
Weed Knife
S70C
SKS51
SK85
Saw Blade
SK85
SK95
SK105
Safety Shoes cap
S50C
S55C
S70C
Prune Scissors
S45C
SK85
Measuring Tape
S50C
SK85
SK95
Knitting Needle
SK85
SK95
Knife
SK85
SK105
SK2Cr5
Handcuffs
S10C
S45C
Nail Clipper
SPCC
S15C
Machette
SAE1070
Chain saw
SAE8660
