Stainless Steel 904l Flanges

At Emirerri Steel, we take pride in offering top-quality stainless steel 904L flanges, catering to the diverse needs of industries worldwide. Our commitment to excellence, coupled with decades of experience in the steel industry, makes us your trusted partner for all your flange requirements.

SS 904L is a super austenitic stainless steel alloy renowned for its exceptional corrosion resistance properties, even in highly corrosive environments such as those containing sulfuric acid and chloride. These flanges are highly durable, making them suitable for a wide range of applications across industries such as chemical processing, oil and gas, pharmaceuticals, and more.

Our stainless steel 904L flanges are available with different face types, including raised face (RF), flat face (FF), and ring type joint (RTJ), ensuring proper sealing and compatibility with various gasket materials.

SS 904l Flanges Size & Specification

Nominal Pipe Size

Outside Diameter of Flange

Thickness of Flange

Diameter of Raised Face

Diameter of Hub at Base

Length Thru Hub

Diameter or Bore

Diameter of Hub at Bevel

Radius of Fillet

Depth of Socket

Welding Neck

Slip-On Threaded Socket

Lap Joint

Slip-on Socket

Lap Joint

1/2

3-1/2

7/16

1-3/8

1-3/16

1-7/8

5/8

0.88

0.9

0.84

1/8

3/8

3/4

3-7/8

1/2

1-11/16

1-1/2

2-1/16

5/8

1.09

1.11

1.05

1/8

7/16

4-1/4

9/16

1-15/16

2-3/16

11/16

1.36

1.38

1.32

1/8

1/2

1-1/4

4-5/8

5/8

2-1/2

2-5/16

2-1/4

13/16

1.7

1.72

1.66

3/16

9/16

1-1/2

11/16

2-7/8

2-9/16

2-7/16

7/8

1.95

1.97

1.9

1/4

5/8

3/4

3-5/8

3-1/16

2-1/2

2.44

2.46

2.38

5/16

11/16

2-1/2

7/8

4-1/8

3-9/16

2-3/4

1-1/8

2.94

2.97

2.88

5/16

3/4

7-1/2

15/16

4-1/4

2-3/4

1-3/16

3.57

3.6

3.5

3/8

13/16

3-1/2

8-1/2

15/16

5-1/2

4-13/16

2-13/16

1-1/4

4.07

4.1

3/8

7/8

15/16

6-3/16

5-5/16

1-5/16

4.57

4.6

4.5

7/16

15/16

7.5/16

6-7/16

3-1/2

1-7/16

5.66

5.69

5.56

7/16

15/16

8-1/2

7-9/16

3-1/2

1-9/16

6.72

6.75

6.63

1/2

1-1/16

13-1/2

1-1/8

10-5/8

9-11/16

1-3/4

8.72

8.75

8.63

1/2

1-1/4

1-3/16

12-3/4

1-15/16

10.88

10.92

10.75

1/2

1-5/16

1-1/4

14-3/8

4-1/2

2-3/16

12.88

12.92

12.75

1/2

1-9/16

1-3/8

16-1/4

15-3/4

2-1/4

3-1/8

14.14

14.18

1/2

1-5/8

23-1/2

1-7/16

18-1/2

2-1/2

3-7/16

16.16

16.19

1/2

1-3/4

1-9/16

19-7/8

5-1/2

2-11/16

3-13/16

18.18

18.2

1/2

1-15/16

27-1/2

1-11/16

5-11/16

2-7/8

4-1/16

20.2

20.25

1/2

2-1/8

1-7/8

27-1/4

26-1/8

3-1/4

4-3/8

24.25

1/2

2-1/2

Stainless Steel 904L Flange Chemical Composition

Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)	Copper (Cu)	Manganese (Mn)	Silicon (Si)	Sulfur (S)	Phosphorus (P)	Carbon (C)
19% to 23%	23% to 28%	4% to 5%	1% to 2%	2%	1%	0.03%	0.045%	0.02%

Stainless Steel 904l Flange Mechanical Properties

Tensile Strength	Yield Strength	Elongation	Hardness	Modulus of Elasticity
490 MPa to 690 MPa (71 ksi to 100 ksi)	220 MPa to 380 MPa (32 ksi to 55 ksi)	35% to 40%	70 HRB to 90 HRB (Brinell) or 150 HB to 190 HB	190 GPa (27.5 x 10^6 psi)

Stainless Steel 904l Flange Physical Properties

Density	Thermal Conductivity	Specific Heat Capacity	Electrical Resistivity	Coefficient of Thermal Expansion	Melting Point
7.98 g/cm³ (0.288 lb/in³)	13.7 W/(m·K) at 20°C (68°F)	500 J/(kg·K) at 20°C (68°F)	850 nΩ·m at 20°C (68°F)	16.5 µm/m·K (9.2 µin/in·°F) from 20°C (68°F) to 100°C (212°F)	1350°C to 1400°C (2460°F to 2550°F)

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Stainless Steel 904l Flanges