ʻO ke kila kila Alloy kahi ʻano kila e hoʻohui i ka chromium, molybdenum, tungsten, vanadium a me nā mea hoʻohui ʻē aʻe i ke kila mea hana kalapona e hoʻomaikaʻi ai i ka paʻakikī, ka paʻakikī, ke kūpaʻa a me ka pale wela. Hoʻohana nui ia no ka hana ʻana i nā mea hana ana, nā mea ʻokiʻoki, nā mea paʻa i ka hopena, nā mea anu a me ka wela, a me kekahi mau mea hana kūikawā.