磁(ci)(ci)(ci)(ci)(ci)(ci)鋼(gang)是生(sheng)產、生(sheng)活、國防科(ke)學技(ji)術(shu)(shu)中廣泛使用(yong)的(de)(de)(de)(de)(de)材料(liao)。如(ru)制造(zao)電(dian)(dian)(dian)(dian)力(li)技(ji)術(shu)(shu)中的(de)(de)(de)(de)(de)各種(zhong)(zhong)電(dian)(dian)(dian)(dian)機、變壓器(qi)(qi)(qi)，電(dian)(dian)(dian)(dian)子(zi)技(ji)術(shu)(shu)中的(de)(de)(de)(de)(de)各種(zhong)(zhong)磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)(xing)元件和(he)微(wei)波(bo)電(dian)(dian)(dian)(dian)子(zi)管，通信技(ji)術(shu)(shu)中的(de)(de)(de)(de)(de)濾波(bo)器(qi)(qi)(qi)和(he)增感(gan)器(qi)(qi)(qi)，國防技(ji)術(shu)(shu)中的(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)(xing)水雷、電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)炮(pao)，各種(zhong)(zhong)家(jia)用(yong)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)等。磁(ci)(ci)(ci)(ci)(ci)(ci)鋼(gang)是由(you)幾種(zhong)(zhong)硬的(de)(de)(de)(de)(de)強金(jin)(jin)屬，如(ru)鐵與鋁(lv)(lv)、鎳、鈷(gu)等合(he)成，有時是銅、鈮、鉭合(he)成，用(yong)來制作超硬度(du)永(yong)磁(ci)(ci)(ci)(ci)(ci)(ci)合(he)金(jin)(jin)。其金(jin)(jin)屬成分的(de)(de)(de)(de)(de)構成不同，磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)(xing)能不同，從而用(yong)途也(ye)不同，主(zhu)要用(yong)于(yu)各種(zhong)(zhong)傳(chuan)感(gan)器(qi)(qi)(qi)、儀表(biao)、電(dian)(dian)(dian)(dian)子(zi)、機電(dian)(dian)(dian)(dian)、、教學、汽車、航空、技(ji)術(shu)(shu)等領(ling)域。主(zhu)要是利(li)用(yong)其各種(zhong)(zhong)磁(ci)(ci)(ci)(ci)(ci)(ci)特(te)性(xing)(xing)和(he)特(te)別效(xiao)應制成元件或器(qi)(qi)(qi)件；用(yong)于(yu)存儲、傳(chuan)輸和(he)轉換電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)能量與信息，或在(zai)特(te)定空間(jian)產生(sheng)強度(du)和(he)分布的(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)(ci)(ci)場(chang)；有時也(ye)以(yi)材料(liao)的(de)(de)(de)(de)(de)自然(ran)形態而直接利(li)用(yong)(如(ru)磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)(xing)液體(ti))。磁(ci)(ci)(ci)(ci)(ci)(ci)鋼(gang)在(zai)電(dian)(dian)(dian)(dian)子(zi)技(ji)術(shu)(shu)領(ling)域和(he)其他(ta)科(ke)學技(ji)術(shu)(shu)領(ling)域中都有重(zhong)(zhong)要的(de)(de)(de)(de)(de)作用(yong)。鋁(lv)(lv)鎳鈷(gu)磁(ci)(ci)(ci)(ci)(ci)(ci)鋼(gang)被人們稱為磁(ci)(ci)(ci)(ci)(ci)(ci)體(ti), 雖然(ran)他(ta)古老, 但他(ta)出se的(de)(de)(de)(de)(de)對高(gao)溫的(de)(de)(de)(de)(de)適應性(xing)(xing), 使其至今仍是重(zhong)(zhong)要的(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)(ci)(ci)鋼(gang)之一。鋁(lv)(lv)鎳鈷(gu)可以(yi)在(zai)500度(du)以(yi)上的(de)(de)(de)(de)(de)高(gao)溫下(xia)正常(chang)工作, 這是他(ta)大(da)的(de)(de)(de)(de)(de)特(te)點, 另外性(xing)(xing)能也(ye)比其他(ta)的(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)(ci)(ci)體(ti)強。