Type Analysis 化學成份
Manganese 錳 | 1.0 | % | Silicon 硅 | 1.0 | % |
Chromium 鉻 | 20.0 | % | Nickel 鎳 | 73.5 | % |
Copper 銅 | 2.0 | % | Aluminum 鋁 | 2.5 | % |
Description描述 |
EVANOHM? alloy R is principally a resistance alloy possessing a standard temperature coefficient of ±20 parts per million per °C and a very low thermal EMF versus copper in heavy sizes. It also displays high tensile strength in fine sizes, high corrosion resistance and is nonmagnetic.
EVANOHM? alloy R是首選的電阻合金材料，它的標準溫度系數是±20PPM。在大尺寸時和銅相比，它的熱EMF很低。用它做的細線具有高抗拉強度、高抗腐蝕性和無磁等特性。
EVANOHM alloy R is exceptionally stable (1 to 15 microhms per year). While many other alloys are susceptible to precipitation hardening which changes electrical properties unpredictably, the resistivity of EVANOHM alloy R always increases during heat treatment. Once obtained, its resistivity does not change significantly even when it is used at temperatures as high as 204°C (400 °F).
EVANOHM alloy R的穩定性超乎想象（1-15微歐姆/年）。在別的很多合金因容易被沉淀硬化而使得電理性能變得不可預測時，EVANOHM alloy R在熱處理中電阻總是在上升。熱處理完后，就算在204°C (400 °F)的高溫下使用它的電阻也不會有大的變動。
The TCR of EVANOHM alloy R can be supplied at ±5 parts per million per °C from - 65 to + 125°C in fine sizes.
EVANOHM alloy R的細線在- 65至+ 125°C間的 TCR（溫度電阻系數）能達到±5 parts per million per °C。
Time effects on EVANOHM alloy R also are minimal compared with other resistance alloys. Standard precision resistors produced using EVANOHM alloy R display a maximum drift of 5 ppm per year for 15 years (for resistance from 1 ohm to 1 megohm); secondary standards display drifts from ± 6 to ±23 ppm per year over a 14 year period.
與別的電阻合金相比，時間對EVANOHM alloy R的影響最小。使用EVANOHM alloy R材料制造的標準精密電阻器在15年里都具有不超過5ppm/年的流失率（電阻從1歐到1兆歐）；二級電阻器在14年內也保有± 6至±23 ppm/年的流失率。 |
Applications應用 |
EVANOHM alloy R has been used principally as round wire and ribbon for precision wound resistors. EVANOHM alloy R首要的用途是作為圓線和帶材用于精密線繞電阻器上。 |
Corrosion Resistance 抗腐蝕性能
Important Note: The following 5-level rating scale is intended for comparative purposes only. Corrosion testing is recommended; factors which affect corrosion resistance include temperature, concentration, pH, impurities, aeration, velocity, crevices, deposits, metallurgical condition, stress, surface finish and dissimilar metal contact. 重要提示：以下5種酸性環境只用于比較，需做腐蝕測試；影響抗腐蝕性能的因素有溫度、濃度、酸堿度、雜質、通風、速率、裂縫、沉淀物、冶煉狀態、應力、表面處理和不同金屬的接觸等等。 |
Nitric Acid 硝酸 | Good 好 |
| Sulfuric Acid 硫酸 | Good 好 |
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Phosphoric Acid 磷酸 | Good 好 |
| Acetic Acid 醋酸 | Good 好 |
|
Sodium Hydroxide 氫氧化鈉 | Good 好 |
| Salt Spray (NaCl) 氯化鈉 | Excellent 優秀 |
|
Sea Water 海水 | Moderate 一般 |
| Humidity 潮濕空氣 | Excellent 優秀 |
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Physical Properties 物理性能
Mean Coefficient of Thermal Expansion平均熱膨脹系數 |
20.00 °C, 100.0 °C | 13.0 | x 10-6 cm/cm/°C |
Electrical Resistivity電阻 |
21.1 °C | 1330 | micro-ohm-mm微歐毫米 |
Thermal EMF熱EMF |
vs. Copper, 0.0000 °C, 100.0 °C | 0.0010 | mV/°C |
Magnetic Properties 磁性能
Magnetic Attraction磁力 |
· None 無 |
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Heat Treatment 熱處理
Heat treatment is generally performed by heating to a temperature below 482/538°C (900/1000°F) to obtain a zero temperature coefficient of resistance.
通常的熱處理是加熱到482/538°C (900/1000°F)以下以得到溫度電阻系數為零的指標。
Stresses introduced during fabrication of wire are minimized by low temperature (<200 °C [<392°F]) stabilizing treatments.
低溫穩定處理(<200 °C [<392°F])能將線材加工中所產生的應力降至最低。 |
Typical Mechanical Properties 典型機械性能
Applicable Specifications 可滿足的標準
Note: While this material meets the following specifications, it may be capable of meeting or being manufactured to meet other general and customer-specific specifications. 本材料除滿足下列標準外，還可以按照其他通用和客戶指定的標準生產。 |
· ASTM B267 Class 1A & 1B & 1C |
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Forms Manufactured 可生產的形狀
