http://www.engineeringtoolbox.com/linear-thermal-expansion-d_1379.html
I didn't have a chance to look up the coefficient of Stainless Steel -- It varies by type.
http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html
http://www.engineeringtoolbox.com/linear-thermal-expansion-d_1379.html