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   Copper Panel Properties
Total Thickness:4mm (0.157 in.)
Core:Polyethylene (solid)
Panel Weight:6.1 kg/m2
Copper Sheet
Metal Thickness:0.2mm (0.0078 in.)
Thermal Expansion:1.7mm/m @ 100°C
Metal Alloy:Deoxidized, High Residual Phosphorus (Cu-DHP EN 1172)*
Metal Weight:8.94 kg/m2
Aluminum Sheet
Metal Thickness:0.3mm (0.012 in.)
Thermal Expansion Coeficient:23.2 (10-6/ºC)
Metal Alloy:3003**
Metal Weight:2.73 kg/m2

Metal Alloys

*Commercially pure copper is deoxidized with phosphorus to leave a relatively high content of this element. This alloy is not susceptible to hydrogen embrittlement. The conductivity of this copper alloy is relatively low due to the high phosphorus content. The chemical composition of phosphorus-deoxidized, high residual phosphorus copper alloy (Cu-DHP) is a minimum of 99.85% copper (Cu) and 0.013 to 0.050% phosphorus (P). This alloy is also classified as Japanese Industrial Standard (JIS) C1220 and American Society of Testing and Materials (ASTM) C12200.

**3003 aluminum alloy, an aluminium-manganese alloy, is a general-purpose alloy with moderate strength, good workability, and good corrosion resistance. It is commonly rolled and extruded. It is also commonly used in sheet metal applications such as gutters, downspouts, roofing, and siding. The chemical composition of 3003 aluminium alloy is:
Aluminium: 96.8 to 99%
Copper: 0.05 to 0.20%

Iron: 0.70% max
Manganese: 1.0 to 1.5%
Silicon: 0.6% max
Zinc: 0.1% max