Low temperature coefficient of resistance
Lower thermal expansion coefficient than the Ni-base super-alloys.
High electrical resistivity
Good corrosion resistance under high temperature
High surface load and creep-resistant
Lower raw-material cost, Lower density and cheap price
Superior oxidation resistance at 800-1300ºC
Technical Index
| Brand name | 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |
| Main chemical composition％ | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 22.5-24.5 | 18.0-21.0 | 21.0-23.0 | 26.5-27.8 |
| Al | 4.0-6.0 | 4.5-6.5 | 5.0-7.0 | 4.2-5.0 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 | |
| RE | opportune amount |
opportune amount |
opportune amount |
opportune amount |
opportune amount |
opportune amount |
opportune amount |
|
| Fe | Rest | Rest | Rest | Rest | Rest | Rest | Rest | |
| Nb0.5 | Mo1.8-2.2 | |||||||
| Max.continuous service temp.of element (℃) |
950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 | |
| Resistivity μΩ.m,20℃ |
1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 | |
| Density (g/cm3 ) |
7.4 | 7.10 | 7.16 | 7.25 | 7.35 | 7.10 | 7.10 | |
| Thermal conductivity KJ/m.h.℃ |
52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | 45.2 | |
| Coefficient of lines expansion α×10-6/℃ |
15.4 | 16.0 | 14.7 | 15.0 | 13.5 | 16.0 | 16.0 | |
| Melting point℃ | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 | |
| Tensile strength Mpa |
580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 | |
| Elongation at rupture % |
>16 | >12 | >12 | >12 | >12 | >12 | >10 | |
| Variation of area % |
65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 | |
| Repeat bending frequency(F/R) |
>5 | >5 | >5 | >5 | >5 | >5 | >5 | |
| Hardness(H.B.) | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | |
| Micrographic structure |
Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
| Magnetic properties |
Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | |
