The CTE is 13 microns/meter-Deg C, which is also equal to 0.000013 meter/meter Deg-C. This is the rate of expansion per deg C change. For 180 C change, the expansion will be 180 x 0.000013 = 0.00234m or 2.34mm (for every meter).
Ah! Now I get it!!! Thanks Allan. I am only in my first semester in mechanical engineering, so my knoledge base is fairly small at the moment. Thanks heaps for the help! Cheers Mick