Ma aloyi a Nickel Chrome (NiCr) ndi zinthu zosagwira ntchito kwambiri zomwe zimagwiritsidwa ntchito popanga zinthu zomwe zimatha kutentha kwambiri mpaka 1,250°C (2,280°F).
Ma alloys a Austenitic awa amadziwika chifukwa cha mphamvu zawo zamakina apamwamba pa kutentha poyerekeza ndi ma alloys a FeCrAl komanso mphamvu zawo zokwawa. Nickel Chrome alloys amakhalabe ductile kwambiri poyerekeza ndi FeCrAl alloys pambuyo pa nthawi yayitali kutentha. Chromium Oxide yakuda (Cr2O3) imapangidwa pa kutentha kwambiri komwe kumatha kuphulika, kapena kuphulika, zomwe zimapangitsa kuti zitha kuipitsidwa malinga ndi ntchito. Osayidi iyi ilibe mphamvu zotchinjiriza zamagetsi monga Aluminium Oxide (Al2O3) ya aloyi a FeCrA. Nickel Chrome alloys amawonetsa kukana kwa dzimbiri bwino kupatula malo omwe sulfure alipo.
Gulu | Ni80Cr20 | Ni70Cr30 | Ni60Cr23 | Ni60Cr15 | Ni35Cr20 | Karma | Evanohm | |
Zolemba mwadzina% | Ni | Bali | Bali | 58.0-63.0 | 55.0-61.0 | 34.0-37.0 | Bali | Bali |
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 | Bali | Bali | Bali | 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 | ||||||
Kutentha kwambiri (°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 | |
Kukanika (uΩ/m, 60°F) | 655 | 704 | 727 | 668 | 626 | 800 | 800 | |
Kachulukidwe (g/cm³) | 8.4 | 8.1 | 8.4 | 8.2 | 7.9 | 8.1 | 8.1 | |
Thermal Conductivity(KJ/m·h·℃) | 60.3 | 45.2 | 45.2 | 45.2 | 43.8 | 46.0 | 46.0 | |
Linear Expansion Coefficient(×10¯6/ ℃) 20-1000 ℃) | 18.0 | 17.0 | 17.0 | 17.0 | 19.0 | - | - | |
Malo osungunuka (℃) | 1400 | 1380 | 1370 | 1390 | 1390 | 1400 | 1400 | |
Kulimba (Hv) | 180 | 185 | 185 | 180 | 180 | 180 | 180 | |
Kulimbitsa Mphamvu (N/mm2 ) | 750 | 875 | 800 | 750 | 750 | 780 | 780 | |
Kutalikira (%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | 10-20 | 10-20 | |
Kapangidwe ka Micrographic | austenite | austenite | austenite | austenite | austenite | austenite | austenite | |
MagneticProperty | Ayi | Ayi | Ayi | Pang'ono | Ayi | Ayi | Ayi | |
Moyo Wofulumira (h/℃) | ≥81/1200 | ≥50/1250 | ≥81/1200 | ≥81/1200 | ≥81/1200 | - | - |