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Tin Free Steel (TFS ECCS) Sheet
- No tin coating, production cost significantly lower than conventional electrolytic tinplate.
- Outstanding paint adhesion & sulfur resistance, avoid food sulfide discoloration.
- Complete SR & DR hardness grades to fit stamping, bending & deep drawing processing.
- Compact chromium layer provides stable anti-corrosion performance for food & chemical contents.
- Compatible with all printing & internal coating processes of traditional tinplate.
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Product Overview
Tin Free Steel (TFS / ECCS) Sheet is a chromium-coated steel sheet without a tin layer, manufactured in accordance with ASTM A623/A657, JIS G3315, and EN 10202 international standards. It uses a low-carbon steel substrate with a double-sided chromium and chromium oxide coating, providing an economical alternative to electrolytic tinplate (ETP) for metal packaging applications.
TFS/ECCS uses the same Single Reduced (SR: T1, T2, T2.5, T3, T4, T5) and Double Reduced (DR: DR7, DR8, DR9, DR9M) temper grades as ETP. SR grades are suitable for deep drawing and flexible packaging components, while DR grades provide higher rigidity for lightweight thin-wall can tops, bottom covers, and rigid packaging structures.
The double-sided chromium coating weight can be customized from 50–150 mg/m² according to the packaging environment. The chromium-based protective film provides strong coating adhesion, sulfur resistance, and corrosion protection, while supporting paint, printing, and internal coating processes. Compared with ETP, the tin-free structure also provides a cost-oriented material option.
With good ductility and formability, TFS/ECCS supports conventional can-making processes including punching, edge curling, seaming, and welding. It is widely used for can lids, easy-open ends, crown caps, screw caps, food packaging ends, battery casings, and cosmetic packaging containers.
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FAQs
Tin Free Steel (TFS / ECCS) Sheet is a low-carbon steel sheet coated on both sides with chromium and chromium oxide instead of tin, used mainly for metal packaging applications.
The product is available in SR T1–T5 and DR DR7, DR8, DR9 and DR9M grades for different forming, hardness and rigidity requirements.
The double-sided chromium coating weight can be customized within 50–150 mg/m², depending on the intended packaging environment.
Typical applications include can lids, easy-open ends, crown caps, screw caps, food packaging ends, battery casings and cosmetic packaging containers.
Yes. The documented processing capabilities include punching, edge curling, seaming and welding, allowing the material to be used with conventional metal can-making processes.
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