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彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)(jin)是(shi)精 密合(he)(he)(he)金(jin)(jin)(jin)的一類，用于制作精 密儀(yi)器儀(yi)表中(zhong)彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)敏感元件(jian)(jian)、儲能(neng)(neng)元件(jian)(jian)和(he)頻率元件(jian)(jian)等彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)(jian)。除(chu)了(le)具有良好(hao)的彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)能(neng)(neng)之 外，還(huan)具有無磁性(xing)(xing)(xing)(xing)、微(wei)塑性(xing)(xing)(xing)(xing)變(bian)形抗力高(gao)、硬度高(gao)、 電阻率低(di)、彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)模量(liang)(liang)溫度系數小(xiao)、內耗小(xiao)等性(xing)(xing)(xing)(xing)能(neng)(neng)。 彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)(jin)包括高(gao)彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)(jin)和(he)恒彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)(jin)。前者彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing) 高(gao)，滯彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)效應低(di)，耐(nai)熱(re)性(xing)(xing)(xing)(xing)好(hao);后者在一定(ding)溫 度范圍內彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)模量(liang)(liang)幾乎不隨溫度變(bian)化，又稱為“艾 林(lin)瓦 (Elinvar) 合(he)(he)(he)金(jin)(jin)(jin)”。彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合(he)(he)(he)金(jin)(jin)(jin)一般在真空(kong)中(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)氣氛中(zhong)進 行(xing)熱(re)處(chu)理。