Tin Free Steel (TFS) is produced by applying electrolytic chromic acid treatment over steel sheets so that they are coated by a thin film composed of lower layer metallic chromium and upper layer chromium hydroxide.
TFS / ECCS may be Single Reduced (SR) or Double Reduced (DR) type and is available both in sheet / coil form.
Depending on user requirement tin free steel of various types with
different formabilities ("tempers")
steel thicknesses ( from 0.13 mm to 0.65 mm)
finishes like bright,stone,matte is available.
For Tin Free, we can provide you list with exact details as per your specifications.
Kindly contact us via phone or mail or Whatsapp with your requirements of material and we will respond promptly as per your needs.
tin free steel specification
Product standard code
| Standard | KS | ASTM | JIS | EN |
|---|---|---|---|---|
| Code | D 3614 SPTFS | A657 | G 3315 SPTFS | 10202 |
Coating weight(unit : mg/m²)
| Symbol | Metal Chrome | Oxide Chrome | Remark |
|---|---|---|---|
| Coating Range(m²) | ≥30 | ≥5 |
Oil Weight(unit : mg/m²)
| Symbol | Aim | Remark |
|---|---|---|
| D - 1 | 4.5 | Printing, Lacquering |
Base Steel Standard Code
| Standard | KS | ASTM | JIS | EN |
|---|---|---|---|---|
| Code | D 3516 SPB | A 625 | SPB | 10202 |
Classification
① Classification by Type of Steel
| Type of Steel | Remark |
|---|---|
| MR (Medium Residual) | It contains few residual minor constituents and it is widely used for applications such as containers. |
| L (Low Metalloid Steel) | It contains particularly few residual minor constituents such as Cu, Ni, Cr, Mo, so that it is suitable for the materials of containers required improved corrosion resistance. |
| D (Drawing) | It is aluminum killed steel, so that it is suitable for the applications, which bear deep drawing, or other working that is liable to produce Luder's lines pattern. |
② Classification by Temper
The temper grade of SR(Single Reduced) BP(Black Plate) shall be expressed by the Rockwell superficial hardness values(HR30Tm)
| Symbol | t ≤ 0.21mm | 0.21mm < t ≤ 0.28mm | t > 0.28mm | Remark | |
|---|---|---|---|---|---|
| T50 | T1 | ≤53 | ≤52 | ≤51 | Deep Drawing, Aerosol |
| T52 | T2 | 53 ± 4 | 52 ± 4 | 51 ± 4 | Battery case |
| T55 | T2.5 | 56 ± 4 | 55 ± 4 | 54 ± 4 | 18L liquid |
| T57 | T3 | 58 ± 4 | 57 ± 4 | 56 ± 4 | General Can |
| T61 | T4 | 62 ± 4 | 61 ± 4 | 60 ± 4 | General Can, Crown |
| T65 | T5 | 65 ± 4 | 65 ± 4 | 64 ± 4 | Food Can Top/End |
The hardness of less than 0.21mm in nominal thickness is normally tested using Rockwell 15T scale and results converted to Rockwell 30T scale.
- The temper grade of DR(Double Reduced) BP(Black Plate) shall be expressed by the Rockwell superficial hardness values(HR30Tm) or 0.2% average Yield Strength.
| Symbol | Average Rockwell superficial hardness | 0.2% average Yield Strength | Remark |
|---|---|---|---|
| DR450 | 68 ± 4 | 450 ± 70 | Aerosol, Food beverage Can |
| DR520 | 72 ± 4 | 520 ± 70 | Aerosol, Food beverage Can |
| DR550 | 73 ± 4 | 550 ± 70 | Aerosol, Food beverage Can |
| DR580 | 74 ± 4 | 580 ± 70 | DRD, Food beverage Can |
| DR620 | 76 ± 4 | 620 ± 70 | DRD, Food beverage Can |
③ Classification by Surface Finish
| Product | Designation | Symbol | Remark | Aim (Ra/㎛) |
|
|---|---|---|---|---|---|
| KS/JIS | TCC | ||||
| Single Reduced SR |
Bright Finish | B | BF | Blackplate finished to have a smooth surface with the use of temper-mill work rolls that have been ground to a low roughness | 0.20~0.40 |
| Stone Finish | R | RX | Blackplate finished to have a directional pattern with the use of final-mill work rolls that have been ground to a higher level of roughness than those used for the bright finish | 0.38~0.58 | |
| Silver Finish | S | D7 | Blackplate finished to have a dull surface with the use of temper-mill work rolls with dull surface texture(Electrolytic tinplate with a luster finish provided by a flow-melted tin coating) | 0.70~1.30 | |
| Matt Finish | M | D7 | Blackplate finished to have a dull surface with the use of temper-mill work rolls with dull surface texture(Electrolytic tinplate with a luster finish provided by a flow-unmelted tin coating) | 0.70~1.30 | |
| Double Reduced DR |
Stone Finish | R | RD | Blackplate finished to have a directional pattern with the use of final-mill work rolls that have been ground to a higher level of roughness than those used for the bright finish | 0.25~0.45 |
Features of Tin Free Steel
TFS has excellent lacquer adhesion properties allowing use for food cans, beverage cans and general line cans.
Excellent resistance to black sulfide stain makes it the most suitable material for making fish cans.
Even when the same surface finish as TIN PLATE is applied to the substrate steel sheet,
it provides the unique surface luster characteristic of metallic chromium.
tin free steel sheet
Factory display of TFS Steel
FAQ
1. What are your advantages?
A: Honesty, competitive prices, professional export process services.
2. How can I trust you?
A: We regard integrity as the life of the company. We can send you some customer cases of tin free steel products for your reference.
3.Can you give warranty of your products?
A: Yes, we extend a 100% satisfaction guarantee on all items. Please feel free to feedback immediately if you are not pleased with our quality or service.
4.Where are you? Can I visit you?
A: Sure,welcome to you visit our factory at any time.
5.How about the delivery time?
A: Within 7-15 days after we confirm you requirement.
6.what kind of payment does your company support?
A: T/T, 100% L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me.
7.Can you provide samples?
A: We provide samples free of charge, but the freight should be paid you the buyer.
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