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彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)是精 密(mi)合(he)(he)(he)金(jin)(jin)的一類，用(yong)于(yu)制作精 密(mi)儀(yi)器儀(yi)表(biao)中(zhong)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)敏感(gan)元(yuan)(yuan)件、儲能元(yuan)(yuan)件和(he)(he)頻率元(yuan)(yuan)件等(deng)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)元(yuan)(yuan)件。除了具(ju)有良好的彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)(xing)(xing)能之 外，還具(ju)有無磁性(xing)(xing)(xing)(xing)(xing)(xing)、微塑性(xing)(xing)(xing)(xing)(xing)(xing)變形抗力(li)高(gao)(gao)、硬(ying)度(du)高(gao)(gao)、 電阻率低(di)、彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)模量溫(wen)度(du)系數小、內(nei)耗小等(deng)性(xing)(xing)(xing)(xing)(xing)(xing)能。 彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)包括高(gao)(gao)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)和(he)(he)恒(heng)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)。前者(zhe)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing) 高(gao)(gao)，滯(zhi)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)效(xiao)應低(di)，耐(nai)熱性(xing)(xing)(xing)(xing)(xing)(xing)好;后(hou)者(zhe)在一定(ding)溫(wen) 度(du)范(fan)圍內(nei)彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)模量幾乎不隨溫(wen)度(du)變化，又稱(cheng)為(wei)“艾 林瓦(wa) (Elinvar) 合(he)(he)(he)金(jin)(jin)”。彈(dan)(dan)(dan)(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)一般在真空中(zhong) 冶煉，半成品或(huo)成品亦(yi)多在真空或(huo)保護(hu)性(xing)(xing)(xing)(xing)(xing)(xing)氣(qi)氛中(zhong)進 行熱處理。