Features and Application Notes
ISA
®
-CHROM 80 is especially characterized by high resistivity and
high resistance to oxidation and chemical corrosion. ISA
®
-CHROM 80
is non-magnetic. It possesses a relatively low temperature coefficient.
ISA
®
-CHROM 80 is suitable for high-value electrical resistors and
for heating wires for any application, also for heating cords and
cables. The maximum working temperature in air is +600 °C when
used for resistance wires and +1,200 °C when used for heating
wires. Oxidized wires display better insulation properties than other
alloys of this kind.
Form of Delivery
ISA
®
-CHROM 80 is supplied in the form of round wires in the range
0.01 to 1.00 mm Ø in bare, oxide-insulated or enamelled condition.
The delivery program also includes stranded and flat wires.
1) ISA
®
-CHROM 80 is a registered trademark of Isabellenhütte Heusler GmbH & Co. KG.
2) These values apply to the state after rapid cooling.
3) The resistivity of nickel-chromium alloys can be modified by special heat treatment (see Technical Information).
4) This value applies to wires of 2.0 mm. For thinner wires the minimum values will substantially increase, depending on the dimension.
Notes on Treatment // lSA
®
-CHROM 80 can easily be spot-
welded. Under certain conditions brazing and soldering is
possible (see Technical Information).
1/2 Data sheets // ISA
®
-CHROM 80 // 7
Electrical Resistance in Annealed Condition
Temperature coefficient
2)
of electrical
resistance between
Electrical resistivity
3)
in: µΩ x cm (first line) and Ω/CMF (second line)
Reference Values
+20 °C and +105 °C
10
-6
/K
+20 °C
tolerance ±5 %
+100 °C +200 °C +300 °C +400 °C +500 °C
+50 to +150 108 109 110 112 114 116
650 656 662 674 686 698
Physical Characteristics (Reference Values)
Density at +20 °C
Melting point
Specific heat
at +20 °C
Thermal conducti-
vity at +20 °C
Average linear thermal expansion coefficient
between +20 °C and
Thermal EMF
against copper at
+100 °C +400 °C +20 °C
g/cm³ lb/cub in °C J/g K W/m K 10
-6
/K 10
-6
/K µV/K
8.30 0.30 +1,400 0.42 15.00 13.00 15.00 +4.00
Mechanical Properties at +20 °C in Annealed Condition
Tensile Strength
4)
Elongation (L
0
= 100 mm) % at nominal diameter in mm
MPa psi
0.020 to 0.063 > 0.063 to 0.125 > 0.125 to 0.50 > 0.50 to 1.00 > 1.00
650 94,250 ≈ 8 ≈ 14 ≈ 18 ≥ 18 ≥ 25
Brand
Name
ISA
®
-CHROM
80
1)
Material
Code
2.4869
Abbreviation
NiCr8020
Chemical Composition (mass components) in %.
Average values of alloy components
Ni
Rem.
Cr
20
Issue 29-March-2014
2/2 Data sheets // ISA
®
-CHROM 80 // 7
Nominal Diameter
mm
Cross Section
mm²
Weight
per 1.000 m
g
DC Resistance Referred to Length at +20 °C
Ω/m
Nominal Value
Tolerance Minimum Value Maximum Value
0.010 0.00007854 0.652 13,751
±10 %
12,376 15,126
0.011 0.00009503 0.789 11,365 10,228 12,501
0.013 0.0001327 1.10 8,137 7,323 8,950
0.014 0.0001539 1.28 7,016 6,314 7,717
0.016 0.0002011 1.67 5,372 4,834 5,909
0.018 0.0002545 2.11 4,244 3,820 4,669
0.020 0.0003142 2.61 3,438
±8 %
3,163 3,713
0.022 0.0003801 3.16 2,841 2,614 3,068
0.025 0.0004909 4.07 2,200 2,024 2,376
0.028 0.0006158 5.11 1,754 1,614 1,894
0.030 0.0007069 5.87 1,528 1,406 1,650
0.032 0.0008042 6.68 1,343 1,235 1,450
0.036 0.001018 8.45 1,061 976 1,146
0.040 0.001257 10.40 859 791 928
0.045 0.001590 13.20 679 625 733
0.050 0.001963 16.30 550 506 594
0.056 0.002463 20.40 439 403 474
0.060 0.002827 23.50 382 351 413
0.063 0.003117 25.90 347 319 374
0.070 0.003848 31.90 281 258 303
0.071 0.003959 32.90 273 251 295
0.080 0.005027 41.70 215 198 232
0.090 0.006362 52.80 170 156 183
0.100 0.007854 65.20 138 127 149
0.110 0.009503 78.90 114
±5 %
108 119
0.112 0.009852 81.80 110 104 115
0.120 0.01131 93.90 95.5 90.7 100
0.125 0.01227 102.00 88.0 83.6 92.4
0.130 0.01327 110.00 81.4 77.3 85.4
0.140 0.01539 128.00 70.2 66.7 73.7
0.150 0.01767 147.00 61.1 58.1 64.2
0.160 0.02011 167.00 53.7 51.0 56.4
0.180 0.02545 211.00 42.4 40.3 44.6
0.200 0.03142 261.00 34.4 32.7 36.1
0.220 0.03801 316.00 28.4 27.0 29.8
0.224 0.03941 327.00 27.4 26.0 28.8
0.250 0.04909 407.00 22.0 20.9 23.1
0.280 0.06158 511.00 17.5 16.7 18.4
0.300 0.07069 587.00 15.3 14.5 16.0
0.315 0.07793 647.00 13.9 13.2 14.6
0.350 0.09621 799.00 11.2 10.7 11.8
0.355 0.09898 822.00 10.9 10.4 11.5
0.400 0.1257 1,040.00 8.59 8.16 9.02
0.450 0.1590 1,320.00 6.79 6.45 7.13
0.500 0.1963 1,630.00 5.50 5.23 5.78
0.550 0.2376 1,970.00 4.55 4.32 4.77
0.560 0.2463 2,040.00 4.38 4.17 4.60
0.600 0.2827 2,350.00 3.82 3.63 4.01
0.630 0.3117 2,590.00 3.46 3.29 3.64
0.650 0.3318 2,750.00 3.25 3.09 3.42
0.700 0.3848 3,190.00 2.81 2.67 2.95
0.710 0.3959 3,290.00 2.73 2.59 2.86
0.800 0.5027 4,170.00 2.15 2.04 2.26
0.900 0.6362 5,280.00 1.70 1.61 1.78
1.000 0.7854 6,520.00 1.38 1.31 1.44
Issue 29-March-2014