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(biāo)準(zhǔn)溫度系數(shù)是±20PPM。在大尺寸時和銅相比，它的熱EMF很低。用它做的細(xì)線具有高抗拉強(qiáng)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(wěn)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(yù)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(xì)線在- 65至+ 125°C間的?TCR（溫度電阻系數(shù)）能達(dá)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(biāo)準(zhǔn)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(nèi)也保有± 6至±23 ppm/年的流失率。

Applications應(yīng)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。

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(huán)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(zhì)、通風(fēng)、速率、裂縫、沉淀物、冶煉狀態(tài)、應(yīng)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

?

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(yōu)秀

?

Sea Water?海水

Moderate?一般

?

Humidity?潮濕空氣

Excellent?優(yōu)秀

?

Specific Gravity比重

?????????

8.10

?

Density密度

?????????

8110

kg/m3

Mean Coefficient of Thermal Expansion平均熱膨脹系數(shù)

????????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

Melting Point熔點(diǎn)

?????????

1350

°C

Thermal EMF熱EMF

????????vs. Copper, 0.0000 °C, 100.0 °C

0.0010

mV/°C

Magnetic Attraction磁力

·? None?無

?

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(shù)為零的指標(biāo)。

Stresses introduced during fabrication of wire are minimized by low temperature (<200 °C [<392°F]) stabilizing treatments.

低溫穩(wěn)定處理(<200 °C [<392°F])能將線材加工中所產(chǎn)生的應(yīng)力降至最低。

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(biāo)準(zhǔn)外，還可以按照其他通用和客戶指定的標(biāo)準(zhǔn)生產(chǎn)。

·? ASTM B267 Class 1A & 1B & 1C

?

·? Ribbon?帶材

·? Wire?線材