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彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)金(jin)是精 密合(he)(he)金(jin)的(de)一(yi)類，用于制作(zuo)精 密儀(yi)器儀(yi)表(biao)中(zhong)(zhong)彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)敏(min)感元件(jian)(jian)、儲能元件(jian)(jian)和頻率(lv)元件(jian)(jian)等彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)元件(jian)(jian)。除(chu)了具(ju)有良好的(de)彈(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(wu)磁性(xing)(xing)(xing)(xing)(xing)(xing)、微(wei)塑(su)性(xing)(xing)(xing)(xing)(xing)(xing)變(bian)形(xing)抗力高(gao)、硬度(du)高(gao)、 電阻率(lv)低(di)、彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)模量溫度(du)系(xi)數小、內(nei)(nei)耗小等性(xing)(xing)(xing)(xing)(xing)(xing)能。 彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)金(jin)包括(kuo)高(gao)彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)金(jin)和恒彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)金(jin)。前者彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing) 高(gao)，滯彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)效應低(di)，耐(nai)熱(re)性(xing)(xing)(xing)(xing)(xing)(xing)好;后者在一(yi)定溫 度(du)范圍(wei)內(nei)(nei)彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)模量幾乎不隨溫度(du)變(bian)化，又稱(cheng)為“艾 林瓦 (Elinvar) 合(he)(he)金(jin)”。彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)(xing)合(he)(he)金(jin)一(yi)般在真空(kong)中(zhong)(zhong) 冶煉，半成(cheng)品(pin)(pin)或(huo)成(cheng)品(pin)(pin)亦多在真空(kong)或(huo)保護性(xing)(xing)(xing)(xing)(xing)(xing)氣(qi)氛中(zhong)(zhong)進(jin) 行熱(re)處理。