Double Reduced Cold Rolled Tinplate Coil used for?
Food and beverage packaging: aluminum cans for cola and beer (tensile strength ≥ 650MPa (DR9 grade), can withstand internal pressure of more than 6 bar for carbonated beverages, tinned layer (2.5-2.8g/m²) provides food-grade corrosion protection), milk powder cans, etc.
Electronic and electrical components: relay housing, mobile phone SIM card holder, etc.
Medical packaging: sterilized instrument tray (0.20mm + chromium-free passivation), etc.
What is Double Reduced DR Cold Rolled Tinplate Coil Technical?
Double cold-rolled tinplate coil is a tin-plated steel coil processed by a special process. It uses cold-rolled tinplate as the substrate and is further rolled and thinned through the secondary cold rolling (double cold rolling) process to form a tin-plated steel coil.
Double Reduced Cold Rolled Tinplate Coil Technical Parameters
|
Item |
Standard value |
Customizable range |
Test standards |
|
Base material type |
MR steel (low carbon) |
L steel (ultra-low carbon) |
EN 10202 |
|
Carbon content (C) |
≤0.12% |
≤0.08% (L steel) |
ASTM A623 |
|
Tensile strength (MPa) |
550-750 |
490-800 |
ISO 6892-1 |
|
Yield strength (MPa) |
450-650 |
400-700 |
GB/T 228.1 |
|
Elongation (A80, %) |
1-8 |
1-10 (after annealing) |
JIS Z 2241 |
|
Hardness (HR30T) |
58-75 |
50-80 |
ASTM E18 |
Double Reduced Cold Rolled Tinplate Coil Technical Material Specifications
|
Parameters |
Standard Specifications |
Allowable tolerance |
Notes |
|
Thickness (mm) |
0.10-0.30 |
±0.01 (≤0.2mm) |
Laser thickness gauge monitoring |
|
Width (mm) |
600-1,200 |
±0.5 (after slitting) |
Extra-wide width can be customized |
|
Roll weight (tons) |
3-15 |
±5% |
Maximum outer diameter 1,500mm |
|
Roll core inner diameter (mm) |
405/508 |
±2 |
Compatible with unwinding machine |
The difference between Double Reduced Cold Rolled Tinplate Coil and ordinary tinned cold rolled coil:
ordinary tinned coil is only cold rolled once, while double cold rolled coil has a second cold rolling process before or after tinning, which is thinner and stronger.