C18990-TM04銅合金規格

C18990-TM04銅合金規格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氧對銅的焊接性有害。鉍或鉛與銅生成低熔點共晶，使銅產生熱脆；而脆性的鉍呈薄膜狀分布在晶界時，又使銅產生冷脆。磷能顯著降低銅的導電性,但可提高銅液的流動性,改善焊接性。適量的鉛、碲、硫等能改善可切削性。紫銅退火板材的室溫抗拉強度爲22～25公斤力/毫米2,伸長率爲45～50%，布氏硬度（HB）爲35～45。

純銅導熱系數爲386.4 w/(m.k).

紫銅的用途比純鐵廣泛得多，每年有50%的銅被電解提純爲純銅，用於電氣工業。這裏所說的紫銅，確實要非常純，含銅達99.95%以上才行，很少量的雜質，特別是磷、砷、鋁等，會大大降低銅的導電率。主要用於制作發電機﹑母線﹑電纜﹑開關裝置﹑變壓器等電工器材和熱交換器﹑管道﹑太陽能加熱裝置的平板集熱器等導熱器材。銅中含氧(煉銅時容易混入少量氧)對導電率影響很大，用於電氣工業的銅一般都必須是無氧銅。