镍铬、镍铬铁电阻电热合金技术参数 一、镍铬、镍铬铁电阻电热合金主要性能 牌号 性能 | cr20ni80 | cr30ni70 | cr15ni60 | 主要化学成份 | ni | rest | rest | 55.0-61.0 | cr | 20.0-23.0 | 28.0-31.0 | 15.0-18.0 | fe | ≤1.0 | ≤1.0 | rest | 元件最高使用温度(ºc) | 1200 | 1250 | 1150 | 电阻率20ºc (μω·m) | 1.09 | 1.18 | 1.12 | 密度(g/cm3) | 8.40 | 8.10 | 8.20 | 导热系数(kj/m·h·ºc) | 60.3 | 45.2 | 45.2 | 线胀系数(α×10-6/ºc) | 18.0 | 17.0 | 17.0 | 熔点约值( ºc) | 1400 | 1380 | 1390 | 延伸率(%) | >20 | >20 | >20 | 显微组织 | austenite | austenite | austenite | 磁性 | nonmagnetic | nonmagnetic | nonmagnetic |
二、镍铬、镍铬铁系列直径及其特性(换算表)
直径 (mm) | 截面积 (mm2) | 每米表面积 (cm2/m) | cr20ni80,cr30ni70,cr15ni60 | 电阻率 μω • m 1.09~1.20±0.05 | 20ºc每米电阻(ω/m) | 每千克长度(m/kg) | 每米重量(kg/m) | 0.10 | 0.0078 | 3.14 | 143.9 | 15578 | 0.0000641 | 0.12 | 0.0113 | 3.77 | 99.90 | 10753 | 0.0000929 | 0.15 | 0.0177 | 4.71 | 63.94 | 6865 | 0.0001456 | 0.17 | 0.0227 | 5.34 | 9.78 | 5353 | 0.0001868 | 0.19 | 0.0284 | 5.97 | 39.85 | 4278 | 0.0002337 | 0.21 | 0.0346 | 6.60 | 29.72 | 3198 | 0.0003126 | 0.25 | 0.0491 | 7.85 | 22.86 | 2475 | 0.000404 | 0.27 | 0.0573 | 8.48 | 18.35 | 1973 | 0.0005068 | 0.29 | 0.0661 | 9.11 | 15.98 | 1718 | 0.000582 | 0.31 | 0.0755 | 9.74 | 14.05 | 1511 | 0.0006618 | 0.35 | 0.0962 | 11.00 | 11.74 | 1263 | 0.0007917 | 0.40 | 0.1257 | 12.57 | 8.992 | 966.6 | 0.001035 | 0.45 | 0.1590 | 14.14 | 7.105 | 764.2 | 0.001309 | 0.50 | 0.1963 | 15.71 | 5.755 | 619.0 | 0.001616 | 0.60 | 0.283 | 18.85 | 4.103 | 429.4 | 0.002329 | 0.70 | 0.385 | 22.0 | 3.014 | 315.6 | 0.003169 | 0.80 | 0.503 | 25.1 | 2.308 | 241.6 | 0.004139 | 0.90 | 0.636 | 28.3 | 1.823 | 191.0 | 0.005236 | 1.00 | 0.785 | 31.4 | 1.477 | 154.8 | 0.006460 | 1.20 | 1.131 | 37.7 | 0.999 | 107.4 | 0.009311 | 1.40 | 1.539 | 44.0 | 0.734 | 78.95 | 0.01267 | 1.60 | 3.01 | 50.3 | 0.562 | 60.45 | 0.01654 | 1.80 | 2.54 | 56.5 | 0.444 | 47.84 | 0.02090 | 2.00 | 3.14 | 62.8 | 0.360 | 38.70 | 0.02584 | 2.20 | 3.80 | 69.1 | 0.297 | 31.98 | 0.03127 | 2.50 | 4.91 | 78.5 | 0.2053 | 22.89 | 0.04369 | 2.80 | 6.16 | 88.0 | 0.184 | 19.73 | 0.05068 | 3.00 | 7.07 | 94.2 | 0.160 | 17.19 | 0.05817 | 3.50 | 9.62 | 110.0 | 0.117 | 12.63 | 0.07918 | 4.00 | 12.57 | 125.7 | 0.090 | 9.667 | 0.1034 | 4.50 | 15.90 | 141.4 | 0.071 | 7.642 | 0.1309 | 5.00 | 19.63 | 157.1 | 0.056 | 6.190 | 0.1616 | 5.50 | 23.80 | 172.8 | 0.049 | 5.105 | 0.1959 | 6.00 | 28.30 | 188.5 | 0.041 | 4.294 | 0.2329 | 6.50 | 33.20 | 204 | 0.035 | 3.660 | 0.2732 | 7.00 | 38.50 | 220 | 0.030 | 3.156 | 0.3169 |
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