Color Coated Tin Roofing Sheet
Electrolytic tinplate sheet with a printed passivated surface for roofing and panels
Specifications
Tinplate Coil/Strip/Sheet
Tin Roofing Sheet in Electrolytic Tinplate
Cold rolled low carbon sheet tinned on both sides for light gauge roofing and panel work
Tin roofing sheet is electroplated tin steel sheet, known in the trade as SPTE or ETP, made by coating cold rolled low carbon steel with commercial pure tin on both faces. Roofing and light fabrication shops specify it where a thin steel panel has to resist rust, take a fold and still be soldered at the seam. Supplying the sheet already tinned removes the protective coating step and the drying time that bare cold rolled sheet needs before a panel can be formed. Gauge runs 0.15~0.50mm to a +/- 0.01 mm tolerance under GB/T 2520-2008, JIS G3303-2008, DIN EN 10203-1991 and ASTM A623M-2011.
- Product Name — Tin Roofing Sheet
- Also Known As — SPTE ETP tinplate sheet
- Material — SPCC MR SPCH
- Thickness — 0.15~0.50mm
- Thickness Tolerance — +/- 0.01 mm
Why It Is Specified
Key Benefits of Tin Roofing Sheet
Rust Protection Built Into the Sheet
Tin on both sides is what stops corrosion and rust on a panel this thin. Nothing has to be sprayed or baked on before the sheet goes into the roll former.
Soldered Seams Without Extra Preparation
Tin gives the sheet its solderability, so lapped and standing seams can be closed with solder rather than sealed with a separate compound.
Predictable Folding Behavior
The base steel keeps its strength and formability under the tin layer, so bend lines stay clean at 0.15~0.50mm instead of tearing at the fold.
Temper Chosen for the Panel Profile
Temper runs T2 T2.5 T3 T3.5 T4 and T5 plus the double reduced DR7 DR7M and DR8, so a deep drawn detail and a stiff flat panel can each get the right sheet.
One Tolerance Across the Delivery
A thickness tolerance of +/- 0.01 mm means the forming line does not need resetting between bundles from the same order.
Clean Light Proof Metal Wall
The sheet is light proof and rugged with strong antioxidant behavior, which is why the same material is used for both panel work and sealed containers.
Problems It Solves
What This Material Removes From Your Process
Panels Rusting at Cut Edges and Folds
Painted thin sheet loses protection wherever it is cut or bent hard. Tin coating on both faces of the base steel keeps corrosion resistance across the formed profile.
Seams That Cannot Be Soldered
Coated sheets with an organic top film cannot be soldered without stripping. The tin surface is solderable as delivered, so seams close with the tools the crew already uses.
Gauge Variation Slowing the Forming Line
Every gauge change means a reset. Holding 0.15~0.50mm to +/- 0.01 mm lets one setting run through the bundle.
Buying Panel Steel and Container Steel Separately
The same tinplate specification covers roofing panel work and packaging container work, so a converter can consolidate onto one material rather than two stock lines.
Application Scenarios
Where It Is Used
Light Gauge Roofing Panels
Formed and seamed roof sheets on outbuildings and workshop roofs where a thin steel panel has to be fixed by hand.
Gutters Flashings and Trim
Folded rainwater goods and flashing details where soldered joints are used and the profile is bent from flat sheet.
Food Packaging Cans
Can bodies and ends that rely on the sealing, preservation and non toxic properties of the tinned surface.
Pharmaceutical and Instrument Packaging
Tins and protective cases for medical and instrument goods that need a light proof and rugged metal wall.
Industrial and Commodity Packaging
General industrial packs and commodity containers where printed tinplate replaces board for strength and shelf appearance.
Who It Is For
Buyers Who Specify This Product
- Roofing contractors buying flat tinplate to fold panels and flashings on site
- Sheet metal workshops producing gutters trim and seamed roof details
- Can makers specifying SPTE base sheet for food container bodies
- Packaging converters buying light gauge tinplate for pharmaceutical and instrument tins
- Builders merchants stocking thin steel sheet for small roofing jobs
- Export traders supplying tinplate sheet to regional forming shops
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | Tin Roofing Sheet |
|---|---|
| Also Known As | SPTE ETP tinplate sheet |
| Material | SPCC MR SPCH |
| Thickness | 0.15~0.50mm |
| Thickness Tolerance | +/- 0.01 mm |
| Tin Coating | 1.1~11.2g/m2 |
| Temper | T2 T2.5 T3 T3.5 T4 T5 DR7 DR7M DR8 |
| Annealing | CA continuous annealing or BA batch annealing |
| Surface Treatment | Bright stone or silver finish with passivation treatment and DOS oil |
| Standards | GB/T 2520-2008 JIS G3303-2008 DIN EN 10203-1991 ASTM A623M-2011 |
| Place of Origin | China |
| Certificate | ISO9001 BV SGS RoHS and mill test certificate |
Technical Features
- SPTE ETP electroplated tin steel sheet tinned on both sides
- Base steel SPCC MR or SPCH cold rolled low carbon
- Thickness 0.15~0.50mm held to +/- 0.01 mm
- Tin coating weight 1.1~11.2g/m2
- Temper T2 T2.5 T3 T3.5 T4 T5 DR7 DR7M DR8
- CA continuous annealing and BA batch annealing both available
- Bright, stone or silver finish with passivation treatment and DOS oil
- Standards GB/T 2520-2008 JIS G3303-2008 DIN EN 10203-1991 ASTM A623M-2011
Materials
- Cold rolled low carbon steel strip in SPCC MR or SPCH
- Commercial pure tin electroplated onto both faces
- Passivation film and DOS oil over the tin coating
Certification
- ISO9001
- BV
- SGS
- RoHS
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Cold rolling low carbon steel to 0.15~0.50mm
Batch annealing BA or continuous annealing CA to set the temper
Double reduction where DR7 DR7M or DR8 is ordered
Electrolytic tinning of both surfaces
Passivation treatment followed by DOS oil
Shearing to sheet size
Bundling with edge protection for export
Quality Control
Checks Before It Ships
- Gauge measured across the sheet against the +/- 0.01 mm tolerance
- Coating weight checked within the 1.1~11.2g/m2 range
- Temper verified against the ordered T or DR grade
- Surface examined for passivation coverage and oil film
- Bundle count and sheet size checked before packing
Customization
What We Can Change on Your Order
- Sheet cut to the panel length and width your profile needs
- Temper selected from T2 through T5 or DR7 DR7M DR8
- Tin coating weight set anywhere in the 1.1~11.2g/m2 range
- Annealing route specified as CA or BA
- Certificate issued against GB JIS DIN or ASTM
Comparison
Tin Roofing Sheet Against the Alternatives
| Galvanized roofing sheet | Tinplate gives a solderable surface and a food safe non toxic coating, which zinc coated sheet does not offer for container or soldered seam work. |
|---|---|
| Painted steel roofing sheet | Protection comes from the metallic tin layer on both faces rather than an organic film that can be scratched through during handling. |
| Plain cold rolled sheet | The same base steel is used but the tinned faces stop rust in transit and in service, so the panel does not need coating before it is formed. |
Use Guide
Specifying Handling and Welding Notes
- Give the finished panel dimensions so sheets arrive sheared rather than being trimmed on site
- Choose a softer temper for deeply folded flashings and a harder or double reduced temper for flat stiff panels
- Keep the DOS oil film until forming because it protects the tin layer during handling
- Support the sheet fully at the bend line so a 0.15mm gauge panel does not buckle at the fold
- Use a solder and flux suited to tinned steel when closing seams
- Stack bundles flat and dry and do not strap directly onto the tin surface without edge protection
Questions Buyers Ask
Tin Roofing Sheet FAQ
Is this the same material as tinplate used for cans?
Yes. It is SPTE ETP electroplated tin steel sheet, the same specification used for can bodies, supplied in sheet sizes for panel work.
How thin can the sheet go?
Down to 0.15mm and up to 0.50mm, held to a tolerance of +/- 0.01 mm.
What is the difference between BA and CA temper?
BA is batch annealing and CA is continuous annealing. Both routes are available and the choice affects the temper grade you end up with, from T2 through T5 and the double reduced DR grades.
Can the sheet be soldered?
Yes. Solderability is one of the properties the tin coating gives the steel, which is why the material is used for seamed panels and container bodies.
Do you cut sheets to our panel size?
Yes. Give the length and width and the sheets are sheared before packing so no trimming is needed at your end.
How is the sheet packed for export?
Sheets are bundled flat with edge protection over the DOS oil film so the tin surface is not marked in transit.
Which certificates come with the material?
A mill test certificate against the ordered standard, with ISO9001, BV, SGS and RoHS documents available on request.
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