High performance at a wide range of temperatures

Histral®R – resistance alloys are highly specialised materials that are indispensable in numerous industrial applications. Thanks to their exceptional electrical and thermal properties, they offer reliable and precise solutions for a wide range of technical challenges. Whether in electronics, the automotive industry or mechanical engineering, Histral®R – resistance alloys are known for their quality and performance.

Aerumtec’s Histral®R – resistance alloys are recognised for their excellent thermal conductivity

Thanks to their excellent thermal conductivity and durability, Histral®R alloys are primarily used as heating conductors. These alloys retain their electrical properties over a wide temperature range and are corrosion-resistant. Histral®R – resistance alloys offer the best solution wherever the highest standards of mechanical strength are required. Their robustness and resistance to high temperatures make them the first choice for demanding applications where reliability and precision are crucial.

  • Flex life
  • Temperature coefficient of resistance
  • Heat-up times

Histral®R – resistance alloys can be used for the following applications

  • Car seat heating
  • Steering wheel heating
  • Hose heating (e.g. for AdBlue® hoses)
  • Gutter heating
  • Pipe heating
  • Floor heating
Histral® Composition Density (g/m³) Resistivity* (Ohm mm²/m) Conductivity* (% IACS) Temperature
coefficient of
resistance
(1/°C)
Tensile strength*
(N/mm²)
tempered
Elongation* Tensile strength*
(N/mm²)
hard
R15 CuSn6 8.8 0.1110 15 0.00065 >380 >30 >690
R20 Ni99.6 8.9 0.0800 22 0.00600 >380 >15 >760
R50 CuNi1 8.9 0.025 69 0.003 >220 >15 >420
R51 CuNi2 8.9 0.0500 35 0.00130 >220 >18 >480
R53 CuNi6 8.9 0.1000 17 0.00072 >250 >18 >520
R54 CuNi10 8.9 0.1500 11 0.00040 >290 >20 >560
R55 CuNi23Mn 8.9 0.3000 6 0.00018 >350 >20 >650
R56 CuNi30Mn 8.9 0.4000 4 0.00010 >400 >20 >700
R59 CuNi44 8.9 0.4900 4 0.00004 >420 >20 >800
R75 CuNi15 8.9 0.210 8 0.0003 >310 >20 >600

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Aerumtec’s product portfolio of Histral®R – resistance alloys

Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.1110 0.1330
Electrical conductivity* (%IACS) 15 13
Tensile strength* (N/mm²) 380 690
Elongation* (%) 30 1
Temperature coefficient of resistance (1/°C) 0.00065 0.00065
Density (g/cm³) 8.8 8.8

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • EN 12166
  • DIN CEN/TS 13388

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R15:

  • Higher flex life results: Histral® R15 provides exceptional flex life and offers best performance in high vibration and movement situations.
  • High temperature performance: The high strength is maintained at elevated temperatures.
  • Good resistivity (specific resistance): Histral® R15 is an ideal material for heating elements.
  • High corrosion resistance: Histral® R15 is an alloy of copper and tin, commonly called bronze. Bronze is highly corrosion resistant as proved by the large number of Bronze Age (about 2200-800BC) tools that are still being found intact.
  • Connecting options: Histral® R15 is suitable for soldering, crimping and ultrasonic welding.
  • Very low temperature coefficient:  This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R15 at 0.00065 is lower than that of CuNi6 (0.00072), currently the most widely used conductor in heating cables and elements.
  • Improved safety reduces failure risk: Under similar electrical and thermal conditions Histral® R15 has a significantly longer operational life compared with CuNi6.

Histral® R15 can be used for the following applications:

  • Signal cables: Signal cables in robotics face very high mechanical demands. In medical equipment these conductors are required to provide the precision and reliability that are vital for patient safety.
  • Heating mats and electric blankets: Heating mats, similar to carpets or rugs on the floor, and subject to high mechanical stress.
  • Car seat heating: Glued or stitched heating areas on non-woven fabrics for original equipment or retro-fitting.
  • Steering wheel heating: In addition to seat heating woven or stitched heating areas on non-woven fabrics, shaped and contoured for steering wheels.
  • Hose heating, e.g. for AdBlue® hoses: Hose heating can be used for different industrial applications. AdBlue® hoses are needed for mobile vehicles. AdBlue® is a solution synthetically generated from high-purity urea in de-mineralized water. It is applied whenever exhaust fumes are re-treated in an SCR-catalyst. The solution needs to be kept heated because of its early freezing point at –11 °C.
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.0800  0.0840
Electrical conductivity* (%IACS) 40 21
Tensile strength* (N/mm²) 380 760
Elongation* (%) 15 1
Temperature coefficient of resistance (1/°C) 0.00600 0.00600
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17740

Availability**

  • Coating: Bare
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size from Ø 0.15 mm to Ø 0.51 mm (AWG34 to AWG24)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R20:

  • Medium electrical conductivity: On account of a good resistance value and a comparatively high temperature coefficient Histral® R20 boasts a good-enough conductivity of 20% IACS.
  • Outstanding mechanical properties: Histral® R20 possesses outstanding strength properties in both hard and soft condition. Its tensile strength amounts to 760 N/mm² in hard condition and still keeps a level of 380 N/mm² in soft condition. Thus, the corresponding values for pure copper are easily outmatched.
  • Very good temperature resistance: The high mechanical resilience of Histral® R20 remains unaffected even at a high thermal load. This makes the material an extremely good choice for connecting wires that are exposed to high temperatures.
  • Excellent corrosion resistance: At room temperature, Histral® R20 features a high resistance to environmental impacts such as air and water, and to decomposing chemicals like hydrochloric acid and alkalis. Therefore, pure nickel conductors are also well suited for challenging environments.
  • High Temperature Coefficient of Resistance: This ratio indicates by how much the resistance in the conductor rises in the event of its temperature going up by 1°C. All metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. The temperature coefficient of Histral® R20 has a value of 0,00600 1/°C. So it ranks at the top tier of all common conductor materials.

Histral® R20 can be used for the following applications:

  • Electrodes in spark plugs: Whenever a certain heat rating in a spark plug is required, the material used for the electrode is frequently pure nickel (Histral® R20).
  • Heating cables: Cables can be used to heat quite a diverse range of objects. The most important aspect for outdoor applications is protection against humidity, frost and icing. There, cables are usually laid in or right on the object, e.g. when it comes to roof gutters, water pipes, containers, satellite dishes or walls, foundations and road surfaces. For indoor purposes, heating cables are employed because of the cozy warmth they radiate, with typical application areas being floors, walls or bench seats, inside which they are placed.All these applications call for the conductor material to be as insusceptible as possible to external influences and partly to mechanical stress as well.
  • Connecting wires for heating conductors and halogen bulbs: Connecting wires and hookup wires are often exposed to high temperatures. This does not only apply to cables used in bakeries, foundries, iron and steel works, but also in the vicinity of saunas, solariums, oil burners, electric stoves or lighting appliances.
  • Control units in extremely temperature-sensitive areas: There are a lot of situations where it is quite difficult to measure temperatures exactly over longer periods or in places that are inaccessible. By using a suitable conductor the temperature inside it can be inferred from how its resistance changes. The following rule of thumb applies: the higher the temperature coefficient of the resistance, the more accurate the measurement. With its temperature coefficient of 0.00600 1/°C, Histral® R20 lends itself exceptionally to temperature-sensitive areas of application.

Further fields of application:

  • Electrical resistors
  • Industrial applications as resistance wires
  • Non-corroding components
  • Build-in components for light bulbs and electron tubes
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.0250  0.0250
Electrical conductivity* (%IACS) 69 69
Tensile strength* (N/mm²) 220 420
Elongation* (%) 15 1
Temperature coefficient of resistance (1/°C) 0.00300 0.00300
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R50:

  • High resistivity (specific resistance): Histral® R50 is an ideal material for heating elements.
  • Low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases.The temperature coefficient of Histral® R50 is 0.00300.

Histral® R50 can be used for the following application:

  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.0500  0.0500
Electrical conductivity* (%IACS) 35 34
Tensile strength* (N/mm²) 220 480
Elongation* (%) 18 1
Temperature coefficient of resistance (1/°C) 0.00130  0.00130
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R51:

  • High resistivity (specific resistance): Histral® R51 is an ideal material for heating elements.
  • Low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R51 is 0.00130.

Histral® R51 can be used for the following application:

  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.1000  0.1000
Electrical conductivity* (%IACS) 17 17
Tensile strength* (N/mm²) 250 520
Elongation* (%) 18 1
Temperature coefficient of resistance (1/°C) 0.00072 0.00072
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R53:

  • High resistivity (specific resistance): Histral® R53 is an ideal material for heating elements.
  • Low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R53 is 0.00072.

Histral® R53 can be used for the following application:

  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.1500  0.1500
Electrical conductivity* (%IACS) 11 11
Tensile strength* (N/mm²) 290 560
Elongation* (%) 20 1
Temperature coefficient of resistance (1/°C) 0.00040 0.00040
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R54:

  • Very high resistivity (specific resistance): Histral® R54 is an ideal material for heating elements.
  • Low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R54 is 0.00040.

Histral® H54 can be used for the following applications:

  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.3000  0.3000
Electrical conductivity* (%IACS) 6 6
Tensile strength* (N/mm²) 350 650
Elongation* (%) 20 1
Temperature coefficient of resistance (1/°C) 0.00018 0.00018
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R55:

  • Very high resistivity (specific resistance): Histral® R55 is an ideal material for heating elements.
  • Very low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R55 is 0.00018.
Histral® R55 can be used for the following applications:
  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.4000  0.4000
Electrical conductivity* (%IACS) 4 4
Tensile strength* (N/mm²) 400 700
Elongation* (%) 20 1
Temperature coefficient of resistance (1/°C) 0.00010 0.00010
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R56:

  • Very high resistivity (specific resistance): Histral® R56 is an ideal material for heating elements.
  • Very low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R56 is 0.00010.

Histral® R56 can be used for the following application:

  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.4900 0.4900
Electrical conductivity* (%IACS) 4 4
Tensile strength* (N/mm²) 420 800
Elongation* (%) 20 1
Temperature coefficient of resistance (1/°C) 0.00004 0.00004
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R59:

  • Very high resistivity (specific resistance): Histral® R59 is an ideal material for heating elements.
  • Very low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R59 is 0.00004.

Histral® R59 can be used for the following applications:

  • Thermocouples
  • Heating cables
Nominal values Tempered Hard
Resistivity* (Ohm mm²/m) 0.0210  0.0210
Electrical conductivity* (%IACS) 8 8
Tensile strength* (N/mm²) 310 600
Elongation* (%) 20 1
Temperature coefficient of resistance (1/°C) 0.00030 0.00030
Density (g/cm³) 8.9 8.9

* Data depend on coating conditions, degree of cold working and thermal treatments during manufacturing process

Specifications

  • DIN 17471

Availability**

  • Coating: Bare, Silver, Nickel, Tin, Gold
  • Temper: Tempered or hard
  • Single end conductors
  • Stranded conductors
  • Bunched conductors
  • Concentric lay conductors
  • Single end size ≥ 0.05 mm (AWG 44)
  • Other diameters or special constructions are available

** Depending on material combination & construction

Special properties of Aerumtec’s Histral® R75:

  • Very high resistivity: Histral® R75 is an ideal material for heating elements.
  • Low temperature coefficient: This shows the relative change of resistance as the temperature rises or falls. Almost all metals have a positive temperature coefficient, meaning that as the temperature increases so does the resistance. This is of particular significance in heating cables and elements. The lower the temperature coefficient of a heating cable, the more uniform the heating power as temperature increases. The temperature coefficient of Histral® R75 is 0.00030.

Histral® R75 can be used for the following application:

  • Heating cables

Further information

alloy materials

Alloy metals  and their impact on
copper wires for electric conductors

alloy surcharge aerumtec

See also the current alloy surcharge
for our Histral® alloys.

Do you have special requirements? Contact us!

Not sure which of our Histral®R resistance alloys is suitable for your application? Get in contact with us! We are happy to advise you!