الحديد والكروم ، سبائك الألومنيوم المقاومة التدفئة

Model

1Cr13
A14

0Cr25

A15

0Cr21

A16

0Cr23

A15

0Cr21

A14

0Cr21

A16Nb

0Cr27
A17Mo2

Properties

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

Balance

Balance

Balance

Balance

Balance

Balance

Balance

Fe

-

-

-

-

-

-

-

Nb0.5

Mo1.8-2.2

Maximum service temperature (℃)

950

1250

1250

1250

1100

1350

1400

Specific resistance (μΩ.m,20℃)

1.25

1.42

1.42

1.35

1.23

1.45

1.53

Density (g/cm³)

7.4

7.10

7.16

7.25

7.35

7.10

7.10

Heat conductivity coefficient (KJ/m.h.℃)

52.7

46.1

63.2

60.2

46.9

46.1

45.2

Linear expansion coefficient (α×10-6/℃)

15.4

16.0

14.7

15.0

13.5

16.0

16.0

Melting point approx (℃)

1450

1500

1500

1500

1500

1510

1520

Tensile strength (Mpa)

580-680

630-780

630-780

630-780

600-700

650-800

680-830

Elongation (%)

>16

>12

>12

>12

>12

>12

>10

Percentage reduction of area (%)

65-75

60-75

65-75

65-75

65-75

65-75

65-75

Alternating bending number

>5

>5

>5

>5

>5

>5

>5

Hardness (H.B.)

200-260

200-260

200-260

200-260

200-260

200-260

200-260

Microscopic structure

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Ferrite

Magnetism

Yes

Yes

Yes

Yes

Yes

Yes

Yes