NiCr 8020 (2.4869) se uporablja za električne grelne elemente v gospodinjskih aparatih in industrijskih pečeh. Tipične uporabe so likalniki, likalni stroji, grelniki vode, brizgalne kalupe za plastiko, spajkalniki, cevni elementi s kovinskim plaščem in kartušni elementi.
Razred | Ni80Cr20 | Ni70Cr30 | Ni60Cr23 | Ni60Cr15 | Ni35Cr20 | Karma | Evanohm | |
Nominalna sestava % | 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 | ||||||
Najvišja delovna temperatura (°C) | 1200 | 1250 | 1150 | 1150 | 1100 | 300 | 400 | |
Upornost (Ω/cmf, 20℃) | 1,09 | 1,18 | 1.21 | 1.11 | 1,04 | 1,33 | 1,33 | |
Upornost (uΩ/m, 60°F) | 655 | 704 | 727 | 668 | 626 | 800 | 800 | |
Gostota (g/cm³) | 8.4 | 8.1 | 8.4 | 8.2 | 7,9 | 8.1 | 8.1 | |
Toplotna prevodnost (KJ/m·h·℃) | 60,3 | 45,2 | 45,2 | 45,2 | 43,8 | 46,0 | 46,0 | |
Koeficient linearnega raztezanja (×10¯6/℃)20–1000℃) | 18,0 | 17,0 | 17,0 | 17,0 | 19,0 | - | - | |
Tališče (℃) | 1400 | 1380 | 1370 | 1390 | 1390 | 1400 | 1400 | |
Trdota (Hv) | 180 | 185 | 185 | 180 | 180 | 180 | 180 | |
Natezna trdnost (N/mm2 ) | 750 | 875 | 800 | 750 | 750 | 780 | 780 | |
Raztezek (%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | 10–20 | 10–20 | |
Mikrografska struktura | avstenit | avstenit | avstenit | avstenit | avstenit | avstenit | avstenit | |
Magnetnalastnost | Ne | Ne | Ne | Rahlo | Ne | Ne | Ne | |
Hitra življenjska doba (h/℃) | ≥81/1200 | ≥50/1250 | ≥81/1200 | ≥81/1200 | ≥81/1200 | - | - |