Electrolytic Tinplate Sheets & Coils for Food, Beverage & Aerosol Can Bodies
China direct manufacturer of prime Electrolytic Tinplate (ETP / SPTE) optimized for 3-piece high-speed welded food cans, aerosol spray cans, paint pails, and 2-piece DRD cans. Engineered for high-frequency electrical resistance welding (Soudronic standard), superior axial load strength, and heavy differential tin coatings (5.6/5.6 & 8.4/8.4 g/m²).
Figure: Prime ETP Tinplate Cut Sheets for High-Speed Can Body Electric Resistance Welding Lines
1. Can Body Steel Technical Matrix (JIS G3303 / ASTM A623 / EN 10202)
| Can Body Category | Steel Grade / Type | Thickness (mm) | Temper Grade (HR30T) | Tin Coating (g/m²) & Welding |
|---|---|---|---|---|
| Acidic Food 3-Piece Cans (Tomato Paste/Fruit) | MR Grade / Type L | 0.17mm – 0.25mm | T2.5 / T3 (55±3) | 5.6/5.6 or 8.4/8.4 + Lacquer Margin on Welded Edge |
| Aerosol Monobloc / 3-Piece Cans | SPCC / MR Grade | 0.18mm – 0.28mm | T3 / T4 (58±3) | 2.8/2.8 g/m² (Pressure Burst Resistance > 1.2 MPa) |
| Dry Food & Tea / Milk Powder Cans | MR Type D / SPCC | 0.20mm – 0.30mm | T2.5 / T3 (55±3) | 2.8/2.8 g/m² Bright / Stone Finish |
| Paint Pails & Chemical Drums | Commercial SPCC | 0.28mm – 0.50mm | T3 / T4 / T5 | 1.1/1.1 or 2.8/2.8 g/m² + Rust Preventative Oil |
2. High-Speed Soudronic Welder Compatibility & Axial Strength
Sino East Steel tinplate sheets feature precise edge-slit trimming (diagonal tolerance within 0.5mm) and strict surface oxide control, ensuring stable welding current and smooth seam mashed welding without splash or micro-pores at speeds up to 500 cans/min.
Complete Can Packaging Solution: Can Lids & EOE Tinplate | Bottle Caps & Closures TFS/ETP | Global Tinplate Manufacturer Hub
3. Technical FAQ: Can Body Electrolytic Tinplate
Q1: How do you prevent corrosion along the can body weld seam?
Our cut sheets provide exact margin-strip bare areas for welding, and we supply technical matching for side-stripe powder or liquid lacquer application to fully seal the welded seam against internal acid attack.
Q2: What is the minimum order quantity (MOQ) and container payload?
Standard MOQ is 20-25 MT (one 20GP container), carrying 12-14 wooden pallets securely choked and lashed for ocean transport.
DR8 / DR9 Double-Reduced Tinplate: 18% to 22% Stamping Yield Increase
For high-speed automated canning and closure lines, downgauging from Single-Reduced (SR T4) to Double-Reduced (DR8 / DR9) tinplate significantly lowers raw material expenditure while exceeding international axial buckle and collapse pressure standards:
| Parameter / Metric | Standard Single Reduced (SR T4) | Double Reduced (DR8 / DR9) | Converter Benefit & Impact |
|---|---|---|---|
| Nominal Thickness (mm) | 0.21mm – 0.22mm | 0.15mm – 0.17mm | 25% Material Thickness Reduction |
| Target Hardness (HR30T) | 58 ± 3 | 73 ± 3 (DR8) / 77 ± 3 (DR9) | Higher yield strength (550 – 620 MPa) |
| Stamping Can Ends per Metric Ton | Approx. 82,000 pcs (Ø 73mm) | Approx. 99,500 pcs (Ø 73mm) | +21.3% More Finished Ends / Ton |
| Axial Collapse Pressure | ≥ 240 kPa | ≥ 260 kPa (Enhanced Rigidity) | 100% Meets Safety Standards |