ʻO 3 j21-serial open-style ʻo Co - Cr - Ni - Mo kahi metala elastic kiʻekiʻe, ka metala me ka paʻakikī kiʻekiʻe, ka ikaika,

ka palena elastic a me ka lakio mālama ikehu, ka ikaika luhi, ka hysteresis elastic liʻiliʻi a me ka hopena ma hope,

ʻaʻohe magnetic, kūpaʻa maikaʻi o ke komo ʻana, kūpaʻa seismic o ka stamping, kūpaʻa maikaʻi loa i ka corrosion, etc.

Hiki i nā mea hoʻohuihui kumu Cobalt ke hana ma nā mahana o 400 degere Celsius a i ʻole ma nā mahana haʻahaʻa.

Kokoke i ka lama (40KHXM, Elgiloy, NAS604PH, KRN, phynox)
Ka % o ka hoʻohuihui kemika

noi: ʻO ka 3j21 alloy kahi mea kahiko i ka waena o nā makahiki 1960 a ua hana ʻia a hoʻohana ʻia no nā makahiki he nui.
Hoʻohana nui ʻia ia no ke kū'ē ʻana i ke komo ʻana, anti-corrosion, anti-seismic, non-magnetic, a me ka ikaika kiʻekiʻe o ka hoʻohana ʻana i ka ea.

nā ʻāpana elastic, e like me ke koʻokoʻo, ka uea, ka pūnāwai, ka pūnāwai a me ka diaphragm.
Hoʻohana ʻia nō hoʻi ia i ka hana ʻana o nā bearings kūikawā, nā ʻau liʻiliʻi, nā bearings pōpō, nā make stamping a me nā mea ʻokiʻoki.