Resistohm 145 / 0cr21al6nb / HN A1 A-1 Resistance Heating Wire
on Resistance Furnace
Resisohm 145A1 large-sized cold-drawn wire products can be used for
high-temperature resistance furnace. Practice has proved that: the
product process is stable, integrated performance is good. Has good
high temperature oxidation resistance and longer service life;
excellent winding properties at room temperature processing, ease
of processing molding; little rebound resilience and so on.
Processing performance is very good; operating temperature can
reach 1400 ºC.
Main specifications and uses:
Conventional Product specifications: 0.5 ~ 10 mm
Uses: mainly used in powder metallurgy furnace, diffusion furnace,
radiant tube heater and all kinds of high-temperature furnace
heating body.
MAIN CHEMICAL ELEMENTS AND PROPERTIES
| Properties Grade | | | | | | | |
| | | Cr | Al | | Re | Fe |
| | | | | | 25.0 | 6.0 | | Suitable | Balance |
| Max Continuous Service Temperature(ºC) | | Diameter 1.0-3.0 | | Diameter large than 3.0, |
| | 1225-1350ºC | | | 1400ºC |
| | | | | | | | |
| Resisivity 20ºC (ohm*mm2/m) | | | | 1.45 | |
| | Density(g/cm3) | | | | | 7.1 | |
| Approximate Melting Point( ºC) | | | | 1500 | |
| | Elongation (%) | | | | | 16-33 | |
| Repeatedly Bend Frequency(F/R) 20ºC | | | | 7-12 | |
| Continuous Service Time under 1350 ºC | | | More than 60 hours |
| | | | | | | | |
| Micrographic Structure | | | | Ferrite | |
| The relationship between the maximum operating temperature and the
furnace atmosphere |
| Furnace | | Dry Air | | Humid Air | | hydrogen-argon | Argon | Decomposition |
| atmosphere | | | | | | gas | | | | ammonia gas |
| Temp(ºC) | | 1400 | | 1200 | | 1400 | | 950 | 1200 |
| Alloy Nomenclature Performance | 1Cr13AL4 | 0Cr25Al5 | 0Cr21AL6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 |
| | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 20.5-23.5 | 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 | 4.2-5.3 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 |
| Main Chemical composition | Re | opportune | opportune | opportune | opportune | opportune | opportune | opportune |
| | Fe | Rest | Rest | Rest | Rest | Rest | Rest | Rest |
| | | | | | | | Nb0.5 | Mo1.8-2.2 |
| Max. continuous service temp. of element(ºC) | 950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 |
| Resistivity at 20ºC(μΩ/m) | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 |
| Density(g/cm3) | 7.4 | 7.1 | 7.16 | 7.25 | 7.35 | 7.1 | 7.1 |
| Thermal conductivity(KJ/m.h.ºC) | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | -- |
| Coefficient of lines expansion(α*10-6/ºC) | 15.4 | 16 | 14.7 | 15 | 13.5 | 16 | 16 |
| Melting point approx.( ºC) | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 |
| Tensile strength(N/mm2) | 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 |
| continuous service time(Hours/ ºC) | -- | ≥80/1300 | ≥80/1300 | ≥80/1300 | ≥80/1250 | ≥50/1350 | ≥50/1350 |
| Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite |
| Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic |
