baɪ ðɪ ˈɜːli twˈɛntiəθ sˈɛntʃɚɹi, kɹˈʌp ˈɑːɹmɚ wʌz ɹˈɛndɚd ˈɑːbsəlˌiːt baɪ ðə dɪvˈɛləpmənt ʌv kɹˈʌp sᵻmˈɛntᵻd ˈɑːɹmɚ ˈɔːlsoʊ "kɹˈʌp sᵻmˈɛntᵻd stˈiːl", "kˈeɪ.sˈiː. ˈɑːɹmɚ" ɔːɹ "kˌeɪsˌiːˈeɪ", ɐn ɪvˈɑːlvd vˈɛɹiənt ʌv kɹˈʌp ˈɑːɹmɚ.
By the early twentieth century, Krupp armour was rendered obsolete by the development of Krupp cemented armour (also "Krupp cemented steel", "K.C. armor" or "KCA"), an evolved variant of Krupp armour.