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彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)合金(jin)是精(jing)(jing) 密合金(jin)的一類(lei)，用(yong)于制作精(jing)(jing) 密儀器儀表中(zhong)彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)敏感元(yuan)件(jian)、儲能元(yuan)件(jian)和頻率元(yuan)件(jian)等彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)元(yuan)件(jian)。除了具有(you)良好的彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)(xing)能之 外，還具有(you)無磁性(xing)(xing)(xing)(xing)(xing)、微塑性(xing)(xing)(xing)(xing)(xing)變(bian)形抗力(li)高(gao)、硬度高(gao)、 電(dian)阻率低、彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)模(mo)量(liang)溫(wen)度系數小(xiao)、內耗小(xiao)等性(xing)(xing)(xing)(xing)(xing)能。 彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)合金(jin)包(bao)括高(gao)彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)合金(jin)和恒彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)合金(jin)。前者彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing) 高(gao)，滯彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)效應低，耐熱性(xing)(xing)(xing)(xing)(xing)好;后者在一定溫(wen) 度范圍內彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)模(mo)量(liang)幾乎不(bu)隨溫(wen)度變(bian)化(hua)，又稱為(wei)“艾 林瓦 (Elinvar) 合金(jin)”。彈(dan)(dan)(dan)性(xing)(xing)(xing)(xing)(xing)合金(jin)一般在真(zhen)空中(zhong) 冶煉，半成品(pin)或成品(pin)亦多在真(zhen)空或保護性(xing)(xing)(xing)(xing)(xing)氣氛(fen)中(zhong)進 行熱處理(li)。