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Chemical Composition and Main Property of Fe-Cr-Al Resistance Alloy |
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Properties \ Grade |
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 |
opportune |
opportune |
opportune |
opportune |
opportune |
opportune |
|
Fe |
Bal. |
Bal. |
Bal. |
Bal. |
Bal. |
Bal. |
Bal. |
|
Nb0.5 |
Mo1.8-2.2 |
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Max Continuous Service Temperature(oC) |
950 |
1250 |
1250 |
1250 |
1100 |
1350 |
1400 |
|
Resisivity 20oC (Ωmm2/m) |
1.25 ±0.08 |
1.42 ±0.06 |
1.42 ±0.07 |
1.35 ±0.07 |
1.23 ±0.07 |
1.45 ±0.07 |
1.53 ±0.07 |
|
Density(g/cm3) |
7.4 |
7.1 |
7.16 |
7.25 |
7.35 |
7.1 |
7.1 |
|
Thermal Conductivity |
52.7 |
46.1 |
63.2 |
60.2 |
46.9 |
46.1 |
45.2 |
|
(KJ/m@h@oC) |
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Coefficient of Thermal Expansion(α×10-6/oC) |
15.4 |
16 |
14.7 |
15 |
13.5 |
16 |
16 |
|
Approximate Melting Point( 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(%) |
>16 |
>12 |
>12 |
>12 |
>12 |
>12 |
>10 |
|
Section Variation |
65-75 |
60-75 |
65-75 |
65-75 |
65-75 |
65-75 |
65-75 |
|
Shrink Rate (%) |
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Repeatedly Bend 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 |
no |
≥80/1300 |
≥80/1300 |
≥80/1300 |
≥80/1250 |
≥50/1350 |
≥50/1350 |
|
Micrographic Structure |
Ferrite |
Ferrite |
Ferrite |
Ferrite |
Ferrite |
Ferrite |
Ferrite |
|
Magnetic Property |
Magnetic |
Magnetic |
Magnetic |
Magnetic |
Magnetic |
Magnetic |
Magnetic |