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904L Stainless Steel Pipe

904L is a very low carbon containing high alloy austenitic stainless steel. The steel designed for the harsh corrosion conditions. 904L has been standardized in many countries now, and have already been approved in the manufacture of pressure vessels.

904L is a very low carbon containing high alloy austenitic stainless steel. The steel designed for the harsh corrosion conditions. 904L has been standardized in many countries now, and have already been approved in the manufacture of pressure vessels.


904L alloy with the same used as CrNi austenitic steel, has a good resistance to pitting and crevice corrosion capabilities, very high stress corrosion cracking capacity, good intergranular corrosion resistance property, good processability and Solderability. The highest temperature heating up to 1180 ℃ when hot forging, the lowest temperature stop forging not less than 900℃. This steel may hot forming during1000 - 1150℃. The steel heat treatment process is 1100 - 1150 ℃, cold fast afrer heated. Although this may use common steel welding technology for welding, but the best way are manual arc welding and TIG welding.


When using manual arc welding, the welding rod diameter should no more than 2.5 mm when welding 6 mm plate; the welding rod diameter is less than 3.2 mm when the thickness is greater than 6 mm. When need to heat treatment after welding, can fast-cooling after heat in 1075 - 1125℃. When useTIG welding, the filling metal can use with the same material, seam is subject to pickling,passivatingtreatment after the welding.


GB/T

UNS

AISI/ASTM

ID

W.Nr

015Cr21Ni26Mo5Cu2

N08904

904L

F904L

1.4539

Chemical Composition:

Grade

%

Ni

Cr

Mo

Cu

904L

Min

24

19

4

1

Max

26

21

5

2








Fe

C

Mn

P

S


Rest

-

-

-




0.02

2

0.03

0.015

Physical Performance:

Density

8.0 g/cm3



Melting point

1300-1390 



Grade

T*S

Y*S

El



Rm N/mm2

RP0.2N/mm2

A5 %



904L

490

215

35




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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