直径A Diameter	原棒尺寸 Fullsize Round Bar	直径尺寸公差 Tolerance for Diameter	调质Hardening And Tempering	制造方法 Method of Manufacturing	每米重量 Weight Per Meter（KG）
25	4000	±0.08	H	冷拔  Cold  Drawing	4.364
30	4000	±0.08	H	冷拔  Cold  Drawing	6.284
38	4000	±1.0	H	冷拔  Cold  Drawing	10.08
40	4000	±1.0	H	冷拔  Cold  Drawing	11.18
43	4000	±1.0	H	冷拔  Cold  Drawing	12.91
50	4000	±1.0	H	冷拔  Cold  Drawing	17.46
60	4000	±0.18	H	冷拔  Cold  Drawing	25.14
70	4000	±0.21	H	冷拔  Cold  Drawing	34.22
80	4000	±0.24	H	冷拔  Cold  Drawing	44.69
90	4000	±0.27	H	冷拔  Cold  Drawing	56.56
100	4000	±0.30	H	冷拔  Cold  Drawing	69.83

数据（参考值）Data

特性 Mechanical Properties 直径 50mm Diameter  50mm
抗拉强度Tensile Strength	比重Specific Density	导电率Conductivity	热导率Thermal  Conduction Degree
245以上Over	8.89	101	391

化学成分（%）Chemical Composition（%）
Cu	Pb	Fe	Sn	Zn	其它 Miscellaneous
99.96以上Over	--	--	--	--	__

概述 Summarization
无氧铜不发生氢蚀脆化。而韧铜（紫铜）因含氧，在高温时（焊接时）会发生氢蚀脆化。
The oxygen free copper will not be damaged by hydrogen neither be embrittled , while tough copper(red copper)will be damaged by hydrogen and embrittled in high temperature (or when being welded)due to oxygen that it contains .
进货商品（尺寸）信息Information for Purchase of Goods（Size）
以下尺寸也能从日本进货 The goods in the following sizes may also be purchased from Japan.