牌号对照表
Comparison Table of Alloy Number
| 标准 Standard
| 合金牌号 Alloy number |
| JIS | C2400 | C2600 | C2680 | C2720 | C2801 |
| ASTM | C24000 | C26000 | C26800 | C27200 | C28000 |
| GB | H80 | H70 | H66(H65) | H63 | H62 |
黄铜化学成分
Chemical Composition
合金牌号 Alloy number | 化学成分% Chemical composition |
| Cu | Pb | Fe | Ni | P | Zn |
| C2400 | 78.5-81.5 | ＜0.05 | ＜0.05 | - | - | 余量Rem. |
| C2600 | 68.5-71.5 | ＜0.05 | ＜0.05 | - | - | 余量Rem. |
| C2680 | 64.0-68.0 | ＜0.05 | ＜0.05 | - | - | 余量Rem. |
| C2720 | 62.0-64.0 | ＜0.07 | ＜0.07 | - | - | 余量Rem. |
| C2801 | 59.0-62.0 | ＜0.10 | ＜0.07 | - | - | 余量Rem. |
物理性能
Physical Properties
合金牌号 Alloy number | C2400 | C2600 | C2680 | C2720 | C2801 |
| 比重Specific gravity（g/cm³） | 8.67 | 8.53 | 8.5 | 8.43 | 8.39 |
| 热膨胀系数Coefficient of thermal expansion [x10-6/K](20-300℃) | 19.1 | 19.9 | 20.3 | 20.6 | 20.8 |
| 导热系数Thermal conductivity (W/(m·k))(20℃)] | 124 | 120 | 116 | 112 | 123 |
| 导电率Electrical conductivity (%IACS)(20 | ≥32 | ≥26 | ≥25 | ≥24 | ≥24 |
| 电阻率Resistivity (μΩ.cm)(20℃) | 5.4 | 6.2 | 6.9 | 7.1 | 6.2 |
| 比热Specific heat(J/g/20℃) | 0.378 | 0.377 | 0.377 | 0.377 | 0.377 |
| 弹性系数Modulus of elasticity(KN/mm2) | 110 | 110 | 103 | 105 | 105 |
机械性能
Mechanical Properties
合金牌号 Alloy number | 状态 Temper | 抗拉强度(N/mm²) Tensile strength | 延伸率(%) Elongation | 硬度(HV) Hardness | 弯曲角度 Bending angle | 内侧半径 Inner radius |
| C2400 | O | ≥255 | ≥44 | — | 180° | 0T |
| 1/4H | 295-375 | ≥30 | — | 180° | 0.5T |
| 1/2H | 325-400 | ≥25 | — | 180° | 1.0T |
| H | ≥375 | — | — | 180° | 1.5T |
| C2600 | O | ≥275 | ≥35 | — | 180° | 0T |
| 1/4H | 325-420 | ≥30 | — | 180° | 0.5T |
| 1/2H | 355-450 | ≥23 | 85-145 | 180° | 1.0T |
| 3/4H | 375-490 | ≥10 | 95-160 | 180° | 1.5T |
| H | 410-540 | — | 105-175 | 180° | 1.5T |
| EH | 520-620 | — | 145-195 | — | — |
| SH | 570-670 | — | 165-215 | — | — |
| ESH | ≥620 | — | ≥180 | — | — |
| C2680 | O | ≥275 | ≥35 | — | 180° | 0T |
| 1/4H | 325-420 | ≥30 | 75-125 | 180° | 0.5T |
| 1/2H | 355-450 | ≥23 | 85-145 | 180° | 1.0T |
| 3/4H | 375-490 | ≥10 | 95-165 | 180° | 1.5T |
| H | 410-540 | — | 105-175 | 180° | 1.5T |
| EH | 520-620 | — | 145-195 | — | — |
| SH | 570-670 | — | 165-215 | — | — |
| ESH | ≥620 | — | ≥180 | — | - |
| C2720 | O | ≥275 | ≥40 | — | 180° | 0T |
| 1/4H | 325-410 | ≥35 | 75-125 | 180° | 0.5T |
| 1/2H | 355-440 | ≥28 | 85-145 | 180° | 1.0T |
| H | ≥410 | — | ≥105 | 180° | 1.5T |
| C2801 | O | ≥325 | ≥35 | - | 180° | 1.0T |
| 1/4H | 355-440 | ≥25 | 85-145 | 180° | 1.5T |
| 1/2H | 410-490 | ≥15 | 105-160 | 180° | 1.5T |
| H | ≥470 | - | ≥130 | 90° | 1.0T |
