TOP Cold Rolled Steel Sheet was developed by Toyo Kohan to have the ultimate thinness of 0.025 mm, a beautiful mirror-like finish, and the ability to withstand deep drawing. It is highly regarded within the industry.
![Cold Rolled Steel Sheet(TOP)](/contents/wp-content/uploads/2024/02/18_main.webp)
![Excellent workability](/contents/wp-content/uploads/2024/03/18_image_02.webp)
Excellent workability
A wide range of steel grades are available for selection, and the fine degree of tempering enables mechanical properties to be controlled to meet various needs.
![Excellent dimensional accuracy and shape](http://tkworks-jp.check-xbiz.jp/contents/wp-content/uploads/2024/04/18_image_03.webp)
Excellent dimensional accuracy and shape
Cutting-edge equipment and operating technologies, including advanced automatic thickness control during press rolling, provide superior dimensional and thickness accuracy and shape.
![Ultra-thin products can be produced](/contents/wp-content/uploads/2024/02/18_image_01.webp)
Ultra-thin products can be produced
We can manufacture down to 25 microns, which falls within the category of metal foil.
Applications
- Battery cans for dry cell batteries
- Weather strips for doors
- Spark plug parts
- Wheel covers
- Bearing retainers
Manufacturable Range
![Manufacturable Range](/contents/wp-content/uploads/2024/02/en_18_manufacturable_01.webp)
The above manufacturable range is applicable to standard tempered steel sheet. Contact us for details.
Standards
General Cold Rolled Steel Sheets and Polished Hoop Steel
Standards Codes (Comparable JIS Standards G 3141) | Features |
---|---|
SPCC | (General purpose)Perfect for bending process and simple tie process, and product types with a range of use. |
SPCD | (For ties)Sheet sheets with superb tie and steel sheets for tie with little disparity in characteristics. |
SPCE | (For deep ties)Obtains a beautiful surface skin even after deep tie processing through steel sheets possessing superb deep tie with crystal grain adjustments. |
Special Polished Hoop Steel
Standards Codes (Comparable JIS Standards G 3311) | Features |
---|---|
S35CM S45CM S50CM | To obtain high strength, use medium carbon steels in materials, and manufactured under strict controls similar to polished hoop steel. |
Special Thin Sheets
Standards Codes (Comparable JIS Standards G 3311) | Features |
---|---|
SF | An ultra thin steel sheet manufactured using a rolling method used for applications very close to foil. |
Base material coil tempering classifications
Comparable JIS Standards | Tempering Classification | Toyo Kohan Types | HR30T | HRB | HV | |
---|---|---|---|---|---|---|
Internal Tempering Code | Features | |||||
SPCC | A | AN | As annealed | 54.0 or less | 57.0 or less | 105 or less |
SPCE | AE | |||||
SPCC | S | SA | Standard tempering(Surface roughness prevention measures) | 58.0 or less | 65.0 or less | 115 or less |
SO | ||||||
SN | ||||||
SB | ||||||
SPCD | SD | Deep Tie Uses | ||||
SPCE | SDE | Deep Tie Uses | ||||
SPCC | 8 | 8 | 1/8 hardness ditto | 49.0-63.0 | 50.0-71.0 | 95-130 |
SUS | 1/8 hardness ditto(Manufactured using continuous annealing method) | |||||
SPCC | 4 | 4M | 1/4 hardness ditto | 58.0-68.0 | 65.0-80.0 | 115-150 |
SU4 | 1/4 hardness ditto(Manufactured using continuous annealing method) | |||||
SU5 | 1/4 hardness ditto(Manufactured using continuous annealing method) | |||||
2 | 2 | 1/2 hardness ditto | 64.0-74.0 | 74.0-89.0 | 135-185 | |
2C | 1/2 hardness ditto(Manufactured using continuous annealing method) | |||||
1 | 1 | Hardness | 71.0 or more | 85.0 or more | 170 or more |
Chemical Composition
Type | C | Mn | P | S | Fe |
---|---|---|---|---|---|
SPCC | 0.15 or less | 1.00 or less | 0.100 or less | 0.035 or less | Bal |
SPCD | 0.10 or less | 0.50 or less | 0.040 or less | 0.035 or less | Bal |
SPCE | 0.08 or less | 0.45 or less | 0.030 or less | 0.030 or less | Bal |
Surface finish
Surface finish | Code | Description | Toyo Kohan Standards |
---|---|---|---|
Dull Finish | D | Matte finish using roll that mechanically roughens surface. | Type 5 |
Bright Finish | B | Smooth finish using roll that makes a smooth finish. | Type 6 |
Mechanical Characteristics
Tensile Strength and Elongation
Comparable JIS Standards | Tempering Classification | Internal Tempering Code | Tensile Strength (N/mm2) | Elongation (%) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thickness Classification (mm) | |||||||||||||
All plate thicknesses (0.10 mm or thicker) | 0.10 or more less than 0.15 | 0.15 or more less than 0.20 | 0.20 or more less than 0.25 | 0.25 or more less than 0.30 | 0.30 or more less than 0.40 | 0.40 or more less than 0.60 | 0.60 or more less than 0.80 | 0.80 or more less than 1.00 | 1.00 or more less than 1.60 | 1.6 or more less than 2.3 | |||
SPCC | A | AN | 270 or more | 23 or more | 23 or more | 25 or more | 25 or more | 31 or more | 34 or more | 36 or more | 36 or more | 37 or more | 38 or more |
SPCE | AE | 270 or more | 27 or more | 27 or more | 29 or more | 32 or more | 35 or more | 38 or more | 40 or more | 40 or more | 41 or more | 42 or more | |
SPCC | S | SA | 270 or more | 23 or more | 23 or more | 25 or more | 28 or more | 31 or more | 34 or more | 36 or more | 36 or more | 37 or more | 38 or more |
SO | |||||||||||||
SN | 270 or more | – | 23 or more | 25 or more | 28 or more | 30 or more | 30 or more | 32 or more | – | – | – | ||
SB | 270 or more | – | 23 or more | 25 or more | 30 or more | 32 or more | 34 or more | 34 or more | – | – | – | ||
SPCD | SD | 270 or more | 25 or more | 25 or more | 27 or more | 30 or more | 33 or more | 36 or more | 38 or more | 38 or more | 39 or more | 40 or more | |
SPCE | SDE | 270 or more | 27 or more | 27 or more | 29 or more | 32 or more | 35 or more | 38 or more | 40 or more | 40 or more | 41 or more | 42 or more | |
SPCC | 8 | 8 SUS | 290-410 | – | – | – | – | – | 25 or more | 25 or more | – | – | – |
4 | 4M | 370-490 | – | – | – | – | – | 10 or more | 10 or more | – | – | – | |
SU4 | |||||||||||||
SUS | |||||||||||||
2 | 2 | 440-590 | – | – | – | – | – | 20 or less | – | – | – | – | |
2C | – | – | – | – | – | 10 or less | – | – | – | – | |||
1 | 1 | 550 or more | – | – | – | – | – | – | – | – | – | – |
Tensile specimen is set to comparable JIS Standards 5 press rolled direction.