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Invar/Kovar Pipe

Invar 36 precision alloy is a 36% nickel-iron alloy notable for its uniquely low coefficient of thermal expansion which is roughly one-tenth that of carbon steel in the range from room temperature to around 200℃. It also retains good strength and toughness at cryogenic temperatures. It can be hot and cold formed and machined using processes similar to austenitic stainless steels.

Invar 36 precision alloy is a 36% nickel-iron alloy notable for its uniquely low coefficient of thermal expansion which is roughly one-tenth that of carbon steel in the range from room temperature to around 200℃. It also retains good strength and toughness at cryogenic temperatures. It can be hot and cold formed and machined using processes similar to austenitic stainless steels.


Applications:

Invar 36 is useful for applications where high dimensional stability is required such as standards of length, precision optical and laser system, cryogenic components. It is also used in conjunction with high expansion alloys in applications in bimetallic thermostats.

It is a registered trademark of Carpenter Technology Corporation. Invar is a trademark of Imphy Alloys.


Invar 36

K93600

W.Nr.1.3912
   Ni36

X1NiCrMoCu

Fe-Ni36

Chemical composition

%

Fe

Ni

C

Mn

Si

P

S

Co

Cr

Min

Balance

35








Max

37

0.15

0.60

0.40

0.025

0.025

0.50

0.25

Physical properties

Density

8.11 g/cm3

Melting point

1430℃



Seamless Stainless Steel Pipe

Standards: ASTM A312
Sizes: 1/4″ Thru 20”

Schedules: 10s, 40s, 80s, 160, and XXH

True 40, True 80


Welded stainless steel pipe
Standards: ASTM A312
Sizes: 1/4″ Thru 36″
Schedules: 10s, 20, 40s, 80s


Equipment:


NB

Size

OD

mm

40S

mm

5S

mm

10S

mm

S 10

mm

S 20

mm

S 40

mm

S 60

mm

XS/80S

mm

S 80

mm

S 100

mm

S 120

mm

S 140

mm

S 160

mm

XXS

mm


1/8”

10.29



1.24



1.73



2.41







1/4”

13.72



1.65



2.24



3.02







3/8”

17.15



1.65



2.31



3.20






15

1/2”

21.34

2.77

1.65

2.11



2.77


3.73

3.73




4.78

7.47

20

3/4”

26.67

2.87

1.65

2.11



2.87


3.91

3.91




5.56

7.82

25

1”

33.40

3.38

1.65

2.77



3.38


4.55

4.55




6.35

9.09

32

1 1/4”

42.16

3.56

1.65

2.77



3.56


4.85

4.85




6.35

9.70

40

1 1/2”

48.26

3.68

1.65

2.77



3.68


5.08

5.08




7.14

10.15

50

2”

60.33

3.91

1.65

2.77



3.91


5.54

5.54




9.74

11.07

65

2 1/2”

73.03

5.16

2.11

3.05



5.16


7.01

7.01




9.53

14.02

80

3”

88.90

5.49

2.11

3.05



5.49


7.62

7.62




11.13

15.24

90

3 1/2”

101.60

5.74

2.11

3.05



5.74


8.08

8.08






100

4”

114.30

6.02

2.11

3.05



6.02


8.56

8.56


11.12


13.49

17.12

125

5”

141.30

6.55

2.77

3.40



6.55


9.53

9.53


12.70


15.88

19.05

150

6”

168.27

7.11

2.77

3.40



7.11


10.97

10.97


14.27


18.26

21.95

200

8”

219.08

8.18

2.77

3.76


6.35

8.18

10.31

12.70

12.70

15.09

19.26

20.62

23.01

22.23

250

10”

273.05

9.27

3.40

4.19


6.35

9.27

12.70

12.70

15.09

19.26

21.44

25.40

28.58

25.40

300

12”

323.85

9.53

3.96

4.57


6.35

10.31

14.27

12.70

17.48

21.44

25.40

28.58

33.32

25.40

350

14”

355.60

9.53

3.96

4.78

6.35

7.92

11.13

15.09

12.70

19.05

23.83

27.79

31.75

35.71


400

16”

406.40

9.53

4.19

4.78

6.35

7.92

12.70

16.66

12.70

21.44

26.19

30.96

36.53

40.49


450

18”

457.20

9.53

4.19

4.78

6.35

7.92

14.27

19.05

12.70

23.83

29.36

34.93

39.67

45.24


500

20”

508.00

9.53

4.78

5.54

6.35

9.53

15.09

20.62

12.70

26.19

32.54

38.10

44.45

50.01


550

22”

558.80

9.53

4.78

5.54

6.35

9.53


22.23

12.70

28.58

34.93

41.28

47.63

53.98


600

24”

609.60

9.53

5.54

6.35

6.35

9.53

17.48

24.61

12.70

30.96

38.89

46.02

52.37

59.54


650

26”

660.40

9.53



7.92

12.70



12.70







700

28”

711.20

9.53



7.92

12.70



12.70







750

30”

762.00

9.53

6.35

7.92

7.92

12.70



12.70







800

32”

812.80

9.53



7.92

12.70

17.48


12.70







850

34”

863.60

9.53



7.92

12.70

17.48


12.70







900

36”

914.40

9.53



7.92

12.70

19.05


12.70








Chemical Composition

GradesC maxMn maxP maxS maxSi maxCrNiMo
3040.082.000.040.030.07518.00-20.008.00-11.00/
304L0.0352.000.040.030.07518.00-20.008.00-13.00/
3160.082.000.040.030.07516.00-18.0011.00-14.002.00-3.00
316L0.0352.000.040.030.07516.00-18.0010.00-15.002.00-3.00


Mechanical Properties

GradesItemperTensile PsiYield PsiElong %Rockwell Hardness
304Annealed85000-10500035000-7500020-5580-95
304LAnnealed
I1/8 Hard
80000-10500030000-7500020-5575-95
316Annealed85000 min35000 min50 min80 min

Annealed80000 min30000 min50 min75 min



Annealed, Pickling, Polished



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