C18990-TM04铜合金规格

C18990-TM04铜合金规格C14181 C14200 C14210 C14300 C14310 C14400 C14410 C14415 C14420 C14425 C14430 C14440 C14500 C14510 C14520 C14530 C14700 C14710 C14720 C14730 C14750 C15000 C15100 C15150 C15500 C15600 C15650 C15710 C15715 C15720 C15725 C15730 C15735 C15750 C15760 C15780 C15790 C15815 C15900 C16200 C16210 C16400 C16500 C17000 C17200 C17300 C17400 C17410 C17420 C17450 C17455 C17460 C17465 C17500 C17510 C17520 C17530 C17600 C17700 C18000 C18020 C18025 C18030 C18040 C18045 C18050 C18070 C18080 C18090 C18100 C18135 C18140 C18141 C18143 C18145 C18150 C18200 C18400 C18500 C18550 C18600 C18610 C18620 C18660 C18661 C18665 C18700 C18835 C18900 C18910 C18980 C18990 C19000 C19002 C19010 C19015 C19020 C19022 C19024氧对铜的焊接性有害。铋或铅与铜生成低熔点共晶，使铜产生热脆；而脆性的铋呈薄膜状分布在晶界时，又使铜产生冷脆。磷能显著降低铜的导电性,但可提高铜液的流动性,改善焊接性。适量的铅、碲、硫等能改善可切削性。紫铜退火板材的室温抗拉强度为22～25公斤力/毫米2,伸长率为45～50%，布氏硬度（HB）为35～45。

纯铜导热系数为386.4 w/(m.k).

紫铜的用途比纯铁广泛得多，每年有50%的铜被电解提纯为纯铜，用于电气工业。这里所说的紫铜，确实要非常纯，含铜达99.95%以上才行，很少量的杂质，特别是磷、砷、铝等，会大大降低铜的导电率。主要用于制作发电机﹑母线﹑电缆﹑开关装置﹑变压器等电工器材和热交换器﹑管道﹑太阳能加热装置的平板集热器等导热器材。铜中含氧(炼铜时容易混入少量氧)对导电率影响很大，用于电气工业的铜一般都必须是无氧铜。