Ocr21al4 Fecral Electric Resistance Heating Wire
OCr21Al4 is one kind of normal material of Fe-Cr-Al alloy.
FeCrAl alloy has the characteristic of high resistivity,low temperature resistance coefficient,high operating temperature,good anti-oxidation and anti-corrosion under high temperature.
It is widely used in industrial furnace, household appliances, industry furnace, metallurgy, machinery, aircraft, automotive, military and other industries producing heating elements and resistance elements.
FeCrAl alloy series: OCr15Al5,1Cr13Al4, 0Cr21Al4, 0Cr21Al6, 0Cr25Al5, 0Cr21Al6Nb,0Cr27Al7Mo2, and etc.
Size dimension range:
Wire: 0.01-10mm
Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.05*5.0-5.0*250mm
Bar:10-50mm
Specification
Alloy Nomenclature Performance |
0Cr21Al4 |
| Main Chemical composition |
Cr |
18.0-21.0 |
| Al |
3.0-4.2 |
| Re |
opportune |
| Fe |
Rest |
| |
|
| Max. continuous service temp. of element(°C) |
1100 |
| Resistivity at 20ºC(μΩ·m) |
1.23 |
| Density(g/cm3) |
7.35 |
| Thermal conductivity(KJ/m·h·ºC) |
46.9 |
| Coefficient of lines expansion(α×10-6/ºC) |
13.5 |
| Melting point approx.( ºC) |
1500 |
| Tensile strength(N/mm2) |
600-700 |
| Elongation at rupture(%) |
>14 |
| Variation of area(%) |
65-75 |
| Repeat Bending frequency(F/R) |
>5 |
| Hardness(H.B.) |
200-260 |
| continuous service time(Hours/ ºC) |
≥80/1250 |
| Micrographic structure |
Ferrite |
| Magnetic properties |
Magnetic
|
Has been used extensively as heating elements in industrial furnaces and electrical kilns.
Has less hot strength than Tophet alloys but much higher melting point.
Our Services
1) Pass ISO9001 and SGS certification.
2) Samples free available.
3) OEM service.
4) Manufacturer test certificate will be provided If necessary.
5) Good packing methods to keep goods safe.
6) Choose safe,quick,price reasonable forwarder to transport for our customers.
7) Short delivery time.
Audited Supplier 
){kind=link}