Specifications - Nickel Iron Alloys
Please open the specification sections below for details of grade designations, mechanical properties and applications.
| Grade Designations And Chemical Composition For Nickel Iron Alloy Wire | ||||||
| Material Designation | Nearest Fit | Ni | Fe | Co | ||
| Symbol | Number | UNS | Other Name | |||
| Nickel Iron | ||||||
| Ni42 | 1.3917 | K94100 | Nilo 42 (d) | 42.0 | Bal | |
| Ni48 | 1.3922 | K94800 | Nilo 48 (d) | 48.0 | Bal | |
| Ni52 | 2.4478 | N14052 | Nilo 52 (d) | 52 | Bal | |
| NiFeCo2918 | 1.3981 | K94610 | Nilo K (d) /Kovar | 29.0 | 53.0 | 17.0 |
| (d) – Trade name of Special Metals. | ||||||
| Physical Properties Of Nickel Iron Alloy Wire | ||||||||||
| Material Designation | Nearest Fit | Resistivity µOhms/cm | Density G/cm3 | Temp Coefficient of Resistance 20-100°C | Melting Point °C | Specific Heat J/Kg.K @20°C | Thermal Conductivity @100°C | |||
| Symbol | Number | UNS | Other Name | W/m.K | ||||||
| Nickel Chrome | ||||||||||
| Ni42 | 1.3917 | K94100 | Nilo 42 (d) | 63 | 8.12 | 0.0025 | 1425 | 500 | 15.0 | |
| Ni48 | 1.3922 | K94800 | Nilo 48 (d) | 41 | 8.20 | 0.0034 | 1425 | 490 | 16.0 | |
| Ni52 | 2.4478 | N14052 | Nilo 52 (d) | 43 | 8.25 | 0.0036 | 1425 | 480 | 17.0 | |
| NiFeCo2918 | 1.3981 | K94610 | Nilo K (d) /Kovar | 49 | 8.36 | 0.0038 | 1450 | 440 | 16.0 | |
| (d) – Trade name of Special Metals. | ||||||||||
| Temperature Coefficient Of Linear Expansion - Nickel Iron Alloys (µm/m.°C) | ||||||
| NICKEL IRON ALLOY | 0° – 300°C | 0° – 350°C | 0° – 400°C | 0° – 450°C | 0° – 500°C | 0° – 550°C |
| Ni42 | 5.3 | 5.4 | 6.2 | 6.7 – 7.4 | 8.0 | |
| Ni48 | 8.7 | 8.7 | 8.8 | 8.9 | 9.1 | 9.6 – 10.3 |
| Ni52 | 10.1 | 10.1 | 10.1 | 10.0 | 10.0 | 10.2 – 10.7 |
| NiFeCo2918 | 5.3 | 5.1 | 5.0 | 5.1 – 5.5 | 6.2 | |
| Service Properties And Applications For Nickel Iron Alloy Wire | |||||
| Material Designation | Nearest Fit | Service Properties | Applications | ||
| Symbol | Number | UNS | Other Name | ||
| Nickel Chrome | |||||
| Ni42 | 1.3917 | K94100 | Nilo 42 (d) | A low and constant expansion factor up to 300°C enables use in high temperature thermostats. | Thermostat rods in furnaces and stoves, glass to metal seals. |
| Ni48 | 1.3922 | K94800 | Nilo 48 (d) | A controlled expansion alloy with 48% nickel. The coefficient of expansion approximately equals that of soft glasses of soda lime and lead oxide types. | Glass to metal seals |
| Ni52 | 2.4478 | N14052 | Nilo 52 (d) | A controlled expansion alloy with 52% nickel. Particularly suitable for seals with soft glasses. | Glass to metal seals. |
| NiFeCo2918 | 1.3981 | K94610 | Nilo K (d) /Kovar | A controlled expansion alloy with 29% nickel, modified with 17% cobalt. A very low coefficient of expansion, which closely matches medium hard boro-silicate glasses. Also useful in ceramic seals. | Glass to metal seals – especially high performance applications. |
| (d) – Trade name of Special Metals. | |||||
