hi, these are the info found.
properties of aluminium
-Impermeable and Odourless
Aluminium foil, even when it is rolled to only 0.007 mm thickness, is still completely impermeable and lets neither light aroma nor taste substances out. Moreover, the metal itself is non-toxic and releases no aroma or taste substances which makes it ideal for packaging sensitive products such as food or pharmaceuticals.
-melting temperature, generally is 660.25 °C (933.40 K)
-Corrosion Resistance
Aluminium naturally generates a protective oxide coating and is highly corrosion resistant. Different types of surface treatment such as anodising, painting or lacquering can further improve this property. It is particularly useful for applications where protection and conservation are required.
Recyclability
Aluminium is 100 percent recyclable with no downgrading of its qualities. The re-melting of aluminium requires little energy: only about 5 percent of the energy required to produce the primary metal initially is needed in the recycling process.
-heat transfer by conduction
q = 2309.07 w
(k = 250 w/mk)
nichrome
The ultimate tensile strength of nichrome is 105,000 PSI (Pounds per Square Inch), yield strength is around 50,000 PSI, and modulus of elasticity is 31 x 10
6 PSI. Following are some of the other physical properties of nichrome.
- Electrical Resistivity at room temperature: 1.0 x 10-6 to 1.5 x 10-6 ohm m
- Thermal Conductivity: 11.3 W/moC
- Magnetic Attraction: None
- Thermal Expansion Coefficient (20oC to 100oC): 13.4 x 10-6/oC
- Temperature Coefficient of Resistivity (25oC to 100oC): 100 ppm/oC
- Specific Gravity: 8.4
- Density: 8400 kg/m3
- Melting point: 1400oC
- Specific Heat: 450 J/kgoC
- Modulus of elasticity: 2.2 x 1011