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Controlled Expansion Alloy Thermal Expansion Table

 

Linear Coefficient of Thermal Expansion (cm per cm per C x 10-6)

 

Kovar
Class 1

Alloy 52
Class 2

Alloy 48
Class 3

Alloy 46
Class 4

Alloy 42
Class 5

Alloy 42-6
Class 6

Invar
Class 7

Degree C

             

30-100

--

10.5

9.4

8.2

4.8

--

0.8 - 1.6

30-150

--

10.5

9.4

8.1

4.6

--

--

30-200

5.5

10.4

9.4

7.9

4.5

--

1.3 - 2.1

30-250

--

10.4

9.3

7.8

4.5

--

--

30-300

5.1

10.2

8.8

7.5

4.0 - 4.7

8.2

4.92

30-325

--

--

--

--

4.7-

--

--

30-350

--

10.2

9.0

7.1 - 7.8

5.0

8.5-9.2

6.2 - 7.0

30-375

--

--

--

7.5

5.5

--

--

30-400

4.6 - 5.2

10.1

8.2 - 9.2

7.5

6.0

10.0

7.8

30-425

--

--

8.9

7.6

--

9.7-10.4

--

30-450

5.1 - 5.5

9.6 - 10.7

9.0

7.9

6.7 - 7.4

10.6

8.5 - 9.2

30-475

--

10.1

9.3

--

--

--

--

30-500

6.2

10.0

9.4

8.2 - 8.9

8.0

11.2

9.7

30-525

--

10.4

--

--

--

--

--

30-550

--

10.2 - 10.7

9.6 - 10.3

9.3

8.8

11.7

--

30-600

7.9

10.8

10.4

9.8

9.5

12.2

11.4

30-700

9.3

11.7

11.3

10.7

10.5

13.0

12.7

30-800

10.4

12.5

12.1

11.6

11.4

13.7

13.5

30-900

11.5

13.3

13.0

12.5

12.3

14.6

13.9

30-1000

--

14.2

13.9

13.4

13.2

15.4

--

Underscored face values are the limits specified in MIL-I-23011C

 

ED FAGAN Europe Ltd. supplies the highest quality special purpose alloys and metals for Aerospace/Aviation, Defence, Magnetic, Electronics, Telecommunications, Lighting, Optical, Ceramics, Heat Treating, Medical, and other high-technology industries.

Controlled Expansion Alloys

Ed Fagan Europe Ltd. stocks a variety of similar alloys for low expansion, controlled expansion, glass-to-metal or ceramic sealing applications that may also satisfy your needs. EFI carries:
Invar
Kovar
42 Alloy
42-6 Alloy
46 Alloy
48 Alloy
52 Alloy

And we also have a large selection of other types of specialty metals and alloys for high technology applications, including:
Electrical/Electronic Nickel
Soft Magnetic Alloys
Refractory Metals and Alloys
Hard to Find Materials