TECHNICAL INFORMATION

Resistance Alloys (India) Ltd.

Electric Resistance Heating Alloy RAIL®- HTM Wire

RAIL®-HTM is an advanced, high purity, high temperature metallurgical product of ferritic iron-

chromium-aluminum alloy (Fe-Cr-Al alloy) with life enhancing additive Re. It can be used at

wire temperature up to 1425°C

RAIL®-HTM has several unique characteristics like higher resistivity, superior oxidation,

high temperature use, lower density, higher yield and exceptional long life.

RAIL®-HTM is specially recommended for use in powder metallurgy furnaces, diffusion

furnaces, radiant tube heating furnaces and all kinds of furnaces that are required to be

operated at high temperature in the range of 1250 °C - 1425 °C

Chemical Composition

Cr Al Si Mn C Re Fe

Nominal 23.5% 6.0% <0.4% <0.7% <0.04% Traces Bal

Min 22% 5.5%

Max 25% 6.5%

Physical, Electrical & Mechanical Properties

Density g/cm3 …

Electrical Resistivity at 20 °C mm2/m …

Elongation % …

Tensile Strength Kgs/mm2

…

Magnetic Property …

Max Continuous Operating

Temperature (in air) … 1425 °C

Melting Temperature … 1500 °C

7.10

1.45 0.03

+ 0.07

≥16

65-80

Magnetic

Table for HTM Wire

SWG

DIA.

mm

Resistance

Ω / m

Length

m/kg

Weight

g/m

Surface Area

cm2/m cm2 / Ω

8.00 0.029 2.801 357.03 251.43 8719.49 7.50 0.033 3.187 313.79 235.71 7184.64 7.00 0.038 3.658 273.35 220.00 5841.38 6.50 0.044 4.243 235.69 204.29 4676.94 6.00 0.051 4.979 200.83 188.57 3678.54 5.50 0.061 5.926 168.75 172.86 2833.41 5.00 0.074 7.170 139.46 157.14 2128.78 4.50 0.091 8.852 112.97 141.43 1551.88 4.00 0.115 11.204 89.26 125.71 1089.94 3.50 0.151 14.633 68.34 110.00 730.17 3.00 0.205 19.917 50.21 94.29 459.82

5 5.38 0.064 6.193 161.47 169.09 2651.97 6 4.88 0.077 7.527 132.85 153.37 1979.16 7 7

4.47 0.092 8.971 111.46 140.49 1521.05 8 4.06 0.112 10.875 91.95 127.60 1139.72

9 3.66 0.138 13.382 74.73 115.03 834.96 10 3.25 0.175 16.971 58.92 102.14 584.62 11 2.95 0.212 20.598 48.55 92.71 437.21 12 2.64 0.265 25.720 38.88 82.97 313.35 13 2.34 0.337 32.737 30.55 73.54 218.21 14 2.03 0.448 43.500 22.99 63.80 142.47 15 1.83 0.551 53.527 18.68 57.51 104.37 16 1.63 0.695 67.469 14.82 51.23 73.75 17 1.42 0.915 88.900 11.25 44.63 48.76 18 1.22 1.240 120.436 8.30 38.34 30.92 19 1.02 1.774 172.297 5.80 32.06 18.07