Nickel & Electrical Resistance Alloys

Precision Resistance Alloys for Heating, Sensing & Process Control

Precision resistance alloys are fundamental to temperature measurement, heating systems, industrial controls, and electronic sensing applications. Their performance depends on stable electrical resistance, predictable temperature characteristics, oxidation resistance, and long-term reliability under demanding operating conditions.

Sigmund Cohn Corp. manufactures precision nickel and specialty resistance alloys engineered for applications where electrical performance must remain consistent over extended service lives.

Whether developing RTDs, thermocouples, heating elements, hermetic seals, or industrial sensing equipment, our engineers work with OEM manufacturers to select alloys that meet both electrical and mechanical performance requirements.

Available Nickel Grades

  • RTD-quality nickel

  • High-uniformity TCR nickel

  • DIN 43760-compliant nickel

  • Commercially Pure Type 205 Nickel

Available Resistance Alloys

  • Nichrome 60*

  • Nichrome 80*

  • Tophet A*

  • Tophet C*

  • Kovar*

  • Constantan®

  • Nickel/Cobalt/Iron

  • Aluminum/Silicon

  • Aluminum/Magnesium

Kovar deserves special consideration in hermetic sealing applications because its coefficient of thermal expansion closely matches borosilicate glass, allowing engineers to create highly reliable glass-to-metal seals for aerospace, electronics, medical, and industrial equipment.

Our engineering team helps customers evaluate:

  • Electrical resistivity

  • Temperature coefficient of resistance (TCR)

  • Operating temperature

  • Oxidation resistance

  • Thermal expansion

  • Mechanical strength

  • Cross-sectional geometry

  • Long-term stability

Typical Applications

  • Resistance Temperature Detectors (RTDs)

  • Thermocouples

  • Heating elements

  • Industrial instrumentation

  • Aerospace sensing

  • Process control systems

  • Hermetic feedthroughs

  • Precision electrical assemblies

Whether you're designing a precision sensing system, specifying resistance wire for industrial heating, or qualifying materials for aerospace electronics, Sigmund Cohn Corp. provides the metallurgical expertise, precision manufacturing, and engineering support needed to optimize product performance.

Contact our engineering team to discuss your resistance alloy, temperature sensing, or custom material requirements.

Nichrome 60 and Nichrome 80 are registered trademarks of D. H. Alloys, Inc. Kovar, Tophet

Technology company. Constantan® is used in accordance with applicable trademark rights.