Acid Pickled SWG 16 17 18 electric resistance heating wire OCr21Al4/0Cr21AL4 fecral alloy OCr23AL5 OCr25AL5

Alloy Nomenclature Performance

1Cr13Al4
0Cr25Al5
0Cr21Al6
0Cr23Al5
0Cr21Al4
0Cr21Al6Nb	0Cr27Al7Mo2
Chemical Composition(%)
Cr
12-15
23-26
19-22
20.5-23.5
18-21
21-23	26.5-27.8

Al
4-6
4.5-6.5
5-7
4.2-5.3
3-4.2
5-7	6-7

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 (℃)

950
1250
1250
1250
1100
1350	1400
Resistivity at 20℃(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.℃)

52.7
46.1
63.2
60.2
46.9
46.1	——
Coefficient of lines expansion (α*10-6/℃)

15.4
16
14.7
15
13.5
16	16
Melting point approx(℃)

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
continous servicetime(Hours/℃)

——
≥80/1300
≥80/1300
≥80/1300
≥80/1250
≥80/1350	≥80/1350
Micrographic structure

Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite	Ferrite
Magnetic properties

Magnetic
Magnetic
Magnetic
Magnetic
Magnetic
Magnetic	Magnetic

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