Alloys Nickel Chrome (NiCr) kayan juriya ne da aka saba amfani da su a aikace-aikace tare da matsakaicin yanayin aiki har zuwa 1,250°C (2,280°F).
Waɗannan allunan Austenitic an san su don ƙarfin injin su mafi girma a yanayin zafi idan aka kwatanta da FeCrAl gami da mafi girman ƙarfin su. Nickel Chrome alloys suma sun kasance mafi ductile idan aka kwatanta da FeCrAl gami bayan tsawan lokaci a zazzabi. Chromium Oxide mai duhu (Cr2O3) yana samuwa ne a yanayin zafi mai girma wanda ke da saurin lalacewa, ko faɗuwa, yana haifar da yuwuwar gurɓatawa dangane da aikace-aikacen. Wannan oxide ba shi da kaddarorin rufe wutar lantarki kamar Aluminum Oxide (Al2O3) na gami da FeCrA. Alloys na nickel Chrome suna nuna kyakkyawan juriya na lalata ban da wuraren da sulfur ke nan.
Daraja | Ni80Cr20 | Ni70Cr30 | Ni60Cr23 | Ni60Cr15 | Ni35Cr20 | Karma | Evanohm | |
Abun ƙima% | Ni | Bal | Bal | 58.0-63.0 | 55.0-61.0 | 34.0-37.0 | Bal | Bal |
Cr | 20.0-23.0 | 28.0-31.0 | 21.0-25.0 | 15.0-18.0 | 18.0-21.0 | 19.0-21.5 | 19.0-21.5 | |
Fe | ≦1.0 | ≦1.0 | Bal | Bal | Bal | 2.0-3.0 | - | |
Al1.0-1.7 Ti 0.3-0.5 | Al2.7-3.2 Mn0.5-1.5 | Al2.7-3.2 Cu2.0-3.0 Mn0.5-1.5 | ||||||
Matsakaicin zafin aiki (°C) | 1200 | 1250 | 1150 | 1150 | 1100 | 300 | 400 | |
Resisivity(Ω/cmf,20℃) | 1.09 | 1.18 | 1.21 | 1.11 | 1.04 | 1.33 | 1.33 | |
Resisivity(uΩ/m,60°F) | 655 | 704 | 727 | 668 | 626 | 800 | 800 | |
Girma (g/cm³) | 8.4 | 8.1 | 8.4 | 8.2 | 7.9 | 8.1 | 8.1 | |
Ƙarfafa Ƙarfafawa (KJ/m·h·℃) | 60.3 | 45.2 | 45.2 | 45.2 | 43.8 | 46.0 | 46.0 | |
Ƙididdigar Faɗaɗɗen Layi (×10n6/ ℃) 20-1000 ℃) | 18.0 | 17.0 | 17.0 | 17.0 | 19.0 | - | - | |
Wurin narkewa (℃) | 1400 | 1380 | 1370 | 1390 | 1390 | 1400 | 1400 | |
Hardness (Hv) | 180 | 185 | 185 | 180 | 180 | 180 | 180 | |
Ƙarfin Ƙarfi (N/mm2 ) | 750 | 875 | 800 | 750 | 750 | 780 | 780 | |
Tsawaita(%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | 10-20 | 10-20 | |
Tsarin Micrographic | Austenite | Austenite | Austenite | Austenite | Austenite | Austenite | Austenite | |
Abubuwan Magnetic | Ba | Ba | Ba | Dan kadan | Ba | Ba | Ba | |
Rayuwa mai sauri (h/℃) | ≥81/1200 | ≥50/1250 | ≥81/1200 | ≥81/1200 | ≥81/1200 | - | - |