Nichrome Alloy Wire

Nichrome 80/20

Nichrome Wire 80/20 - Also called Alloy 650, A Resistance Alloy used in electrical heating application. It is recommended for use in dry air applications up to 2150 degrees F with good hot strength. It is an alloy of nickel and chromium with high electrical resistance; used for resistance heating elements. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time. Material beneath the wire will not oxidize, preventing the wire from breaking or burning out.

Applications:

Sizes Available For 80/20 Nichrome
0.05 - 5.1 mm / 44 - 5 AWG
packed in spool: 0.02 mm - 1.0 mm
packed in coil: > 1.0 mm
Rod/Bar diameter: 1 mm - 30 mm

Sizes Available For 80/20 Nichrome Strip
Width: 0.114" - 0.500" / 1mm - 280mm / 4 - 50 AWG
Thickness: 0.0043" - 0.030" / 0.01mm to 7 mm

Insulations: Polyimide, Polyurethane, Formvar. HML 240

Extrusions: FEP, PFA-260, TFE in tape wrap form.

Specifications:

Specific Gravity: 8.3

Specification: ASTM-B-344

UNS Number: N06003

Typical Anaysis: Cr - 20% Ni - 80%

Table 1: Resistance per inch (Ω), closed helix, 80/20 alloy.

Wire Gauge
(B&S No. / AWG)
Outside Diameter of Helix (inches)
3/4 5/8 1/2 3/8 1/4 7/32 3/16 5/32 1/8 3/32 1/16 1/32
14 0.446 0.365 0.283 0.202 0.121 0.101
15 0.638 0.523 0.408 0.293 0.178 0.148 0.120
16 0.895 0.735 0.575 0.415 0.255 0.215 0.175 0.135
17 1.32 1.08 0.851 0.617 0.383 0.325 0.266 0.208 0.150
18 1.89 1.56 1.22 0.891 0.559 0.475 0.392 0.309 0.226
19 2.60 2.14 1.69 1.23 0.779 0.665 0.551 0.438 0.324
20 3.72 3.07 2.42 1.78 1.13 0.967 0.805 0.644 0.482
21 4.53 3.58 2.63 1.68 1.45 1.21 0.971 0.733 0.496
22 4.98 3.67 2.36 2.03 1.70 1.37 1.05 .719
23 7.02 5.18 3.34 2.88 2.42 1.96 1.51 1.05
23 7.02 5.18 3.34 2.88 2.42 1.96 1.51 1.05
24 4.69 4.05 3.41 2.78 2.14 1.60 0.865
25 6.87 5.94 5.02 4.10 3.17 2.25 1.32

 

 

Nichrome 80/20 - Resistance alloy 650

Resistance Alloy 650 - NiCr 80/20 Composition

Ni 80%, Cr 20%

Resistance Alloy 650 - NiCr 80/20 Tradenames

Tophet A, Nichrome V, HAl -NiCr80, Chromel A, Nikrothal 8, Protoly, N8, Resistohm 80, Nichrome 80/20

Resistance Alloy 650 - NiCr 80/20 Sizes / Temper Capabilities

Condition: Bright, Annealed, Soft 

Wire diameter 0.02mm-1.0mm packing in spool, big than 1.0mm packing in coil

Rod, Bar diameter 1mm-30mm 

Strip: Thickness 0.01mm-7mm, Width 1mm-280mm 

Resistance Alloy 650 - NiCr 80/20 Applications

These elements are commonly found in precision heating applications such as Medical Diagnostics, Satellite, and Aerospace, Electrical appliance industry, Ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular elements, cartridge elements.