There is no single tungsten temperature. It radiates a differently balanced spectrum depending on how much current it's carrying and its exact composition. The color temperature is based on black body radiation and the balance of the spectrum at given temperatures on the Kelvin scale. There are A and B films, both tungsten, A=3400 Kelvin and B=3200 Kelvin.
Household tungsten lamps vary in color temperature with wattage, mostly in the 2750-2900K range.
Kodachrome 40 is definitely Tungsten Type A, balanced for 3400K illumination.
The 85 and 85A filters are the same, although I've seen some internet sources (perhaps correct, perhaps not) that say the Cokin 85 and 85A are different by several hundred Kelvin.