推荐回答（2个）
热处理后最高达到48hrc左右。
C17500是典型的沉淀强化型的铜合金。除有高的强度、弹性、硬度、耐腐蚀性、耐高低温、无磁、冲击时不产生火花等特性。C17500有非常好的加工性能，可采用各种成型方式加工成复杂的形状。
C17500经淬火调质后，具有高的强度.硬度.弹性.耐磨性.疲劳高限和耐热性；同时还具有高的导电性.导热性和耐寒性，无磁性，碰击时无火花，易于焊接和纤焊，在大气.淡水和海水中抗蚀性优异。C17500铍铜产品特性：高性能铜合金，经固溶及时效硬化处理，具有高硬度，高耐磨性，高屈服高限与疲劳高限，耐腐性能佳，高导电率及优异的散热性能。易于加工，冷却效果优异。
C17500具有中等屈服程度其导电率为纯铜的45-65%，这一性质使其在需要散热及载流的场合得到应用。
C17500化学成分：
铝 Al：0.02
铁 Fe：0.10
铍 Be：0.40-0.7
硅 Si：0.20
铜 Cu：余量
钴 Co：2.4-2.7
C17500物理性能：
密度：8.75
比热容：420
C17500力学性能：
抗拉强度 （σb/MPa）：240
伸长率 （δ10/%）：≥20
硬度 （HB)≤50
注：棒材的力学性能
试样尺寸：直径（5-40）
C17500化学性能：
C17500氧化抗性优于紫铜。在大气、淡水和海水中有很高的化学稳定性，晶间腐蚀倾向性小，并能耐冲击腐蚀，在稀酸和磷酸等介质中有良好的耐蚀性，但在潮湿氨、硝酸、珞酸性溶液中腐蚀速度较快。
C17500工艺性能：
1成型性能：具有良好的热成型性，能热挤、热轧和锻造。具有较好的冷加工性，能进行冷轧、冲压、弯曲、旋压、和液压成型。
2焊接性能：具有良好的焊接性，易于钎焊和熔焊，包括锡焊、电阻焊、等离子焊、电子束焊和激光焊。真空或高压使用的组件易用电子束焊。
C17500切削性能：
切削加工性20%。预时效或时效后能改善其切削加工性能。
C17500主要应用于熔断器、紧固件、弹簧、开关部件、电接器件、导线、电阻焊电极头、缝焊电极盘、塑料模具等
铍铜材料:高性能铜合金,具有高硬度,高耐磨性,高抗爆性,高导电率及优异的散热性能,易于加工,,硬度可按客户要求进行热处理
磷青铜不能通过热处理来硬化或增加其强度, 只能通过冷加工的加工硬化方法来提高强度.但是硬态的磷青铜产品可通过低温退火(目的为消除残余应力),可稍微提高强度.而且处理前强度越高, 晶粒越细, 则退火后增加值也越高.
铍铜的弹性非常的好, 但由于铍有毒,目前很多行业正在逐步寻找其他材料替代. 磷青铜的弹性在铜合金中应该说也是不错的, 一般都用于弹性元件, 但仍然无法与铍铜相比. 磷青铜一般需镀镍，铍铜需要经过热处理才能获得很好的弹性，铍铜比磷青铜要贵很多。
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