Page 260 - Welding of Aluminium and its Alloys

Appendix B

Physical, mechanical and chemical
properties at 20°C

Table A.2

Property Aluminium Iron Nickel Copper Titanium

Crystal structure FCC BCC FCC FCC HCP
3
Density (gm/cm ) 2.7 7.85 8.9 8.93 4.5
Melting point (°C) 660 1536 1455 1083 1670
Specific heat (J/kgK) 930 448 440 385 470
Thermal conductivity 235 79.6 92.1 389.4 15.5
(W/mK)
Coeff. of thermal 23.9 ¥ 10 -6 12 ¥ 10 -6 1 ¥ 10 -6 16.5 ¥ 10 -6 8.2 ¥ 10 -6
expansion (Dl/l °C)
Electrical resistivity 2.65 9.7 6.8 1.67 55
(mW cm)
Young’s modulus E 6.7 ¥ 10 4 21 ¥ 10 4 21 ¥ 10 4 12.4 ¥ 10 4 10.8 ¥ 10 4
2
(N/mm )
Ultimate tensile 65 235 300 210 245
2
strength (N/mm )

226