to the desired width a 2 the expansion can extend a dimension by a factor of 10 to 300 20 to 250 or 50 to 100 the final width determines the overall width of the member as well as the final configuration and dimension of the of the web voids after expanding the member can be heat treated to strengthen a portion of the member for example by heating the portion of the member for a period of time or the entire member and quenching the member the member can have a yield strength of between 10 and 100 ksi or 30 to 60 ksi for example 33 ksi or 50 ksi an alternative method of manufacturing the expanded web is to apply heat to change the mechanical properties of the metal prior to or during expansion the heat can be used in to anneal the material according to acceptable practices this can be accomplished by heating and cooling to remove residual stress and work hardening that has taken place during the rolling process of steel manufacture annealing can maximize the ability to cold form and expand the web in another example the heat can be applied to heat the material to a temperature that can allow the web to be formed or expanded while in the elevated temperature state after forming the material can be cooled in whatever method or at whatever speed is desired to obtain the final desired mechanical properties the second process allows the ability to create a.