Indispensable in daily life, tin plate is a reliable material boasting an attractive luster and excellent corrosion resistance.
Toyo Kohan provides high-quality tin plate to a wide range of specifications to meet customer needs.
Since our founding in 1934, we have grown together with our customers by manufacturing tin plate as a material for containers. The technology that we developed with our customers continues to evolve, and we are now focusing on new uses that can contribute to the solving of environmental problems.
Beautiful surface
Tin plate has a beautiful surface after coating and printing, with a unique and attractive metallic luster.
Excellent weldability
All kinds of processing (bending, drawing, etc.), welding, and soldering are easy to perform.
Excellent corrosion resistance
With its excellent corrosion resistance, it is widely used for food cans. (Conforms to the Food Sanitation Act.)
Our Products
Tinplate
- This surface-treated steel sheet is made by tin plating the surface of cold-rolled steel sheets.
- Sheet thickness of 0.2 mm and sheet width of about 900 mm are usual.
LTS／CR Tinplate
LTS
- Thin tin-plated steel sheet features the minimum amount of tin (1.3 g/m2) that can be stably welded from an economic standpoint, and offers improved paint adhesion strength compared to tin plate.
CR Tinplate
- Tin plate with improved paint adhesion.
Application
- Food cans
- Beverage cans and metal caps
- 18-liter cans
- Candy tins
- Spray cans
- Tin plate toys
- Electric and electronic parts
- Bearing parts（sealing parts）
Tin plate has found itself integrated into various aspects of our daily lives. Since 1934, when we became the first privately owned tin plate manufacturer in Japan, we have been providing high-quality tin plate to meet our customers’ needs. Our high-quality tin plate, produced using traditional techniques in state-of-the-art facilities, is highly appreciated by our customers both in Japan and overseas.
Related sites
Examples！
Gift Package Cans（Tinplate）
From cookies and rice crackers to tea leaves and dried foods, opening the lid delivers a simply irresistible moment.
At Toyo Kohan, we also work on decorative cans for gifts that epitomize the Japanese spirit of thoughtfulness.
Manufacturing process
Tin plate, which is used for a wide range of applications including can materials, is manufactured under strict quality control to ensure the right characteristics for each application.
Properties
| Product | Tinplate | Hi-Top | |||
|---|---|---|---|---|---|
| Tin（Sn=2.8g/m²） | LTS | Hi-Top（TFS） | WHT-2 | ||
| Weldability | RC value（mΩ）1 | 0.1 to 0.3 | 0.1 to 0.3 | 100 to 200 | 0.1 to 0.3 |
| Assessment | Good | Good | Bad | Good | |
| Rust proofing | Salt spray test2 | Excellent | Good | Poor | Poor |
| Coating Adhesion | Cup process adhesion test3 | Poor | Good | Excellent | Excellent |
| T peel test4 | Poor | Good | Excellent | Excellent | |
- 1 RC value: Test materials heat processed for 20 minutes at 205 degree centigrade then contact electrical resistance is measured using our company’s RC measuring instruments (RC value: Small → Weldability: Good)
- 2 Salt spray test: 35 degree centigrade, 5% salt solution sprayed for 2 hours → visual inspection
- 3 Cup process adhesion test: Lacquer coating → cup process → cup wall surface coated film strength peeled with tape → visual inspection
- 4 T peel test: Lacquer coating → Cut to 5 mm width → 2 test material sheets thermally compressed via nylon film → Measure peeling stress
Weldability
The following diagram shows an example of the weldable current range using manufactured can seam welder. Good welding materials possess a wide weldable current range.
Available Sizes
The manufacturable range depends on the combination of each specification (thickness, width, temper etc.).
Ask us especially about combination specifications with sheet thickness upper and lower limits and sheet width upper limits.
Also ask us about specifications as needed.
Sheet
| Normal manufacturing range | Manufacturable range | |
|---|---|---|
| Sheet Thickness（mm） | 0.15 to 0.50 | 0.13 to 0.60 |
| Sheet Width（mm） | – | 670 to 1,060 |
| Length（mm） | 510 to 1,070 | 460 to 1,110 |
Coil
| Normal manufacturing range | Manufacturable range | |
|---|---|---|
| Sheet Thickness（mm） | 0.15 to 0.60 | 0.07 to 0.80 |
| Sheet Width（mm） | – | 670 to 1,060 |
Hoop
| Normal manufacturing range | Manufacturable range | |
|---|---|---|
| Sheet Thickness（mm） | 0.15 to 0.50 | 0.13 to 0.60 |
| Sheet Width（mm） | 30 to 500 | 10 to 500 |
Standards
Tin is manufactured under strict quality controls based on standards comparable to JIS G 3303.
Temper grade
| Temper grade symbol | Hardness (HR30TSm) | Features | |||
|---|---|---|---|---|---|
| Thickness t (mm) | |||||
| t≦0.210 | 0.210<t≦0.280 | 0.280<ｔ | |||
| Single rolled | T-1 | 50±4 | 49±4 | 48±4 | Particularly excellent flexibility |
| T-2 | 54±4 | 53±4 | 52±4 | Moderate flexibility and toughness | |
| T-2.5 | 56±4 | 55±4 | 54±4 | Flexibility and moderate toughness | |
| T-3 | 58±4 | 57±4 | 56±4 | Moderate toughness | |
| T-4 | 62±4 | 61±4 | 60±4 | Relatively high toughness | |
| T-5 | 66±4 | 65±4 | 64±4 | Excellent buckling resistance | |
| Twice rolled | DR-8 | 72±4 | Excellent rigidity and strength | ||
| DR-9 | 75±4 | Excellent rigidity and strength | |||
| DR-9M | 76±4 | Excellent rigidity and strength | |||
| DR-10 | 79+3,−4 | Outstanding rigidity and strength | |||
Amount of plating (one side)
| Type symbol | Standard adhesion amount g/m² | Symbol of adhesion amount | Tin adhesion amount g/m² |
|---|---|---|---|
| SPTE | 2.8 | 2.8 | 2.45 or more |
| 5.6 | 5.6 | 5.05 or more | |
| 8.4 | 8.4 | 7.55 or more | |
| 11.2 | 11.2 | 10.1 or more |
Tin plating film thickness [μm] = Tin adhesion amount [g/m2] / Tin specific gravity (7.3 [g/cm3])
We can offer tin plating in the range of 1.3 to 11.2 g/m2 (with either the same thickness or different thickness of plating on front and back surfaces)
Surface finish
| Surface finish name | Code | Surface roughness Target value μmRa | Features |
|---|---|---|---|
| Bright E | BE | ≦0.20 | Very glossy finish with superior solderability. |
| Bright | B | 0.25 | Gloss finish, widely used for general purposes. |
| Light roughness side | BR | 0.30 | Lightly polished finish only used for double rolled products. |
| Rough | R1 | 0.40 | An original whetstone-like finish on which scratches do not show up. |
| Very rough | R2 | 0.60 | An original rough whetstone-like finish that keeps the surface unmarred. |
| Matte | M | 1 | A dull, semigloss finish that is non-reflown. |
| Silver 1 | S1 | 1 | A dull finish that is reflown. |
| Silver 2 | S2 | 1 | A dull finish that is reflown. |
| Silver 4 | S4 | 3 | A dull finish that is reflown. |
