fecral alloy 0cr21al4 0cr19al3 0cr25al5 electric heating resistance wire

Alloy Nomenclature Performance
1Cr13Al4
0Cr21Al4
0Cr23Al5
0Cr25Al5
0Cr21Al6
0Cr21Al6Nb	0Cr27Al7Mo2
Main Chemical composition
Cr
12.0-15.0
18.0-21.0
21.5-23.5
23.0-26.0
19.0-22.0
21.0-23.0	26.5-27.8
Al
4.0-6.0
3.0-4.2
4.2-5.3
4.5-6.5
5.0-7.0
5.0-7.0	6.0-7.0
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(°C)
950
1100
1250
1250
1250
1350	1400
Resistivity at 20ºC(μΩ·m)
1.25
1.23
1.35
1.42
1.42
1.45	1.53
Density(g/cm3)
7.4
7.35
7.25
7.1
7.16
7.1
7.1
Thermal conductivity(KJ/m·h·ºC)
52.7
46.9
60.2
46.1
63.2
46.1	--
Coefficient of lines expansion(α×10-6/ºC)
15.4
13.5
15
16
14.7
16
16
Melting point approx.( ºC)
1450
1500
1500
1500
1500
1510	1520
Tensile strength(N/mm2)
580-680
600-700
637-784
630-780
630-780
650-800	686-784
Elongation at rupture(%)
>16
>14
>12
>12
>12
>12
>12
Variation of area(%)
65-75
65-75
65-75
60-75
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)
--
≥80/1250
≥80/1300
≥80/1300
≥80/1300
≥50/1350
≥50/1350
Micrographic structure
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite

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