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 PRODUCT>HEATING ELEMENT |
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Fe-Cr-Al- high resistances and electric heating alloys |
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Specifications???Standard: (GB/T 1234、Q/IYRO 01)
Main?characteristics of Fe-Cr-Al- high resistances and electric heating alloys
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?
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1Cr13Al4
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0Cr25Al5
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0Cr21Al6
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0Cr23Al5
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0Cr21Al4
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0Cr21Al6Nb
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0Cr27Al7Mo2
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Main chemical composition％
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Cr
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12.0-15.0
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23.0-26.0
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19.0-22.0
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22.5-24.5
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18.0-21.0
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21.0-23.0
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26.5-27.8
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Al
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4.0-6.0
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4.5-6.5
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5.0-7.0
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4.2-5.0
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3.0-4.2
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5.0-7.0
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6.0-7.0
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RE
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opportune
amount
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opportune
amount
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opportune
amount
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opportune
amount
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opportune
amount
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opportune
amount
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opportune
amount
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Fe
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Rest
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Rest
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Rest
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Rest
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Rest
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Rest
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Rest
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?
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?
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?
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?
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?
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?
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Nb0.5
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Mo1.8-2.2
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Max.continuous
service temp.of
element (℃)
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950
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1250
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1250
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1250
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1100
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1350
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1400
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Resistivity
μΩ.m,20℃
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1.25
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1.42
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1.42
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1.35
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1.23
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1.45
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1.53
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Density
(g/cm3 )
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7.4
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7.10
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7.16
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7.25
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7.35
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7.10
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7.10
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Thermal
conductivity
KJ/m.h.℃
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52.7
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46.1
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63.2
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60.2
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46.9
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46.1
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45.2
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Coefficient of
lines expansion
α×10-6/℃
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15.4
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16.0
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14.7
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15.0
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13.5
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16.0
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16.0
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Melting point℃
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1450
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1500
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1500
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1500
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1500
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1510
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1520
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Tensile strength
Mpa
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580-680
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630-780
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630-780
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630-780
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600-700
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650-800
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680-830
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Elongation at
rupture %
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>16
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>12
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>12
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>12
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>12
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>12
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>10
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Variation of
area %
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65-75
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60-75
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65-75
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65-75
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65-75
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65-75
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65-75
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Repeat bending
frequency(F/R)
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>5
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>5
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>5
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>5
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>5
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>5
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>5
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Hardness(H.B.)
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200-260
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200-260
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200-260
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200-260
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200-260
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200-260
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200-260
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Micrographic
structure
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Ferrite
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Ferrite
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Ferrite
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Ferrite
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Ferrite
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Ferrite
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Ferrite
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Magnetic
properties
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Magnetic
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Magnetic
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Magnetic
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Magnetic
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Magnetic
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Magnetic
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Magnetic
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