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彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合金(jin)(jin)是精 密合金(jin)(jin)的一(yi)類(lei)，用(yong)于制作(zuo)精 密儀器儀表中彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)敏感(gan)元件(jian)、儲能元件(jian)和頻率(lv)元件(jian)等彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)。除了具有良好(hao)的彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)能之 外，還具有無磁性(xing)(xing)(xing)(xing)、微塑性(xing)(xing)(xing)(xing)變(bian)形抗(kang)力(li)高(gao)、硬度高(gao)、 電阻率(lv)低(di)、彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)模量(liang)(liang)溫度系數小、內耗小等性(xing)(xing)(xing)(xing)能。 彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合金(jin)(jin)包括高(gao)彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合金(jin)(jin)和恒彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合金(jin)(jin)。前(qian)者(zhe)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)，耐熱性(xing)(xing)(xing)(xing)好(hao);后者(zhe)在一(yi)定溫 度范圍內彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)模量(liang)(liang)幾乎不(bu)隨溫度變(bian)化，又(you)稱為(wei)“艾 林瓦 (Elinvar) 合金(jin)(jin)”。彈(dan)(dan)(dan)(dan)性(xing)(xing)(xing)(xing)合金(jin)(jin)一(yi)般在真空中 冶煉，半成(cheng)品或成(cheng)品亦多在真空或保(bao)護性(xing)(xing)(xing)(xing)氣氛中進 行熱處理(li)。