Stainless Steel Products

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Stainless Steel Flange

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Stainless steel flange simplified as SS flange, it refers to the flanges that made of stainless steel. 


Common standards and Grades are ASTM A182 Grade F304/L and F316/L, 

with pressure ratings from Class 150, 300, 600 etc and to 2500. 


Connections Types for Stainless Steel Flanges
Slip on flange

Weld neck flange

Blind flange

Socket weld flange

Threaded pipe flange


Advantages:
Resistant to corrosion and staining
Low maintenance
Bright familiar luster
Steel Strength


Dimensions: 1/2'' to 2'', 3'', 4'', 6'' and up to 48''.
Wall thickness schedule: SCH 10S, SCH 40S, SCH STD, SCH 80S
Pressure ratings: 150#, 300#, 600#, 900#, 1500#, 2500#
Material Grade: F304, F316, F321 and more


Chemical Requirements of ASTM A182

Grade/Identification Symbol

UNS

Designation

Chemical Composition (%)

carbon

Manganese

Phosphorus

Sulfur

Silicon

Nickel

Chromium

Molybdenum

Columblum

Titanium

Other Elements

Low Alloy Steels

F5C

K41545

0.15

0.30-0.60

0.030

0.030

0.50

0.50

4.0-6.0

0.44-0.65

...

...

...

F9

K90941

0.15

0.30-0.60

0.030

0.030

0.50-1.00

...

8.0-10.0

0.90-1.10

...

...

...



F91



K90941



0.08-0.12



0.30-0.60



0.020



0.010



0.20-0.50



0.40



8.0-9.5



0.85-1.05



0.06-0.10


N 0.03-0.07 Al 0.02D Ti 0.01D

Zr 0.01D













V 0.15-0.25












N 0.030-0.070












Al 0.02D

F92

K92460

0.07-0.13

0.30-0.60

0.020

0.010

0.50

0.40

8.50-9.50

0.30-0.60

0.04-0.09

W 1.50-2.00












B 0.007-0.015












Ti 0.01D












Zr 0.01D

F11, Class 1

K11597

0.05-0.15

0.30-0.60

0.030

0.030

0.50-1.00

...

1.00-1.50

0.44-0.65

...

...

...

F11, Class 2

K11572

0.10-0.20

0.30-0.80

0.040

0.040

0.50-1.00

...

1.00-1.50

0.44-0.65

...

...

...

F11, Class 3

K11572

0.10-0.20

0.30-0.80

0.040

0.040

0.50-1.00

...

1.00-1.50

0.44-0.65

...

...

...

F12, Class 1

K11562

0.05-0.15

0.30-0.60

0.045

0.045

0.50 max

...

0.80-1.25

0.44-0.65

...

...

...

F12, Class 2

K11564

0.10-0.20

0.30-0.80

0.040

0.040

0.10-0.60

...

0.80-1.25

0.44-0.65

...

...

...

F21

K31545

0.05-0.15

0.30-0.60

0.040

0.040

0.50 max

...

2.7-3.3

0.80-1.06

...

...

...

F22, Class 1

K21590

0.05-0.15

0.30-0.60

0.040

0.040

0.50


2.00-2.50

0.87-1.13

...

...

...

F22, Class 3

K21590

0.05-0.15

0.30-0.60

0.040

0.040

0.50


2.00-2.50

0.87-1.13

...

...

...

Austenitic Stainless Steels

F304

S30400

0.080

2.00

0.045

0.030

1.00

8.0-11.0

18.0-20.0

...

...

...

N 0.10

F304L

S30403

0.030

2.00

0.045

0.030

1.00

8.0-13.0

18.0-20.0

...

...

...

N 0.10

F316

S31600

0.080

2.00

0.045

0.030

1.00

10.0-14.0

16.0-18.0

2.00-3.00

...

...

N 0.10

F316L

S31603

0.030

2.00

0.045

0.030

1.00

10.0-15.0

16.0-18.0

2.00-3.00

...

...

N 0.10

F321

S32100

0.080

2.00

0.045

0.030

1.00

9.0-12.0

17.0-19.0

...

...

I

...

C. The present grade F 5a (0.25 max carbon) previous to 1995 eas assigned the identification symbol F 5. Identification symbol F 5 in 1955 was assigned to the
0.15 max carbon grade to be consistent with ASTM soecification for other products such as pipe, tubing, bolting, welding fittings, and the like.
D. Applies to both heat and product analysises.
I. Grade F 321 shall have a titanium content of not less than five times the carbon content and not more than 0.70%


Mechanical Properties of ASTM A182



Grade Symbol


Tensile Strength, min, ksi [MPa]


Yield Strength, min, ksi [MPa]B


Elongation in 2 in. [50 mm] or 4D, min, %


Reduction of Area, min, %

Brienell Hardness Number, HBW, unless otherwise indicated

Low Alloy Steels

F5

70 [485]

40 [275]

20

35

143-217

F9

85 [585]

55 [380]

20

40

179-217

F91

90 [620]

60 [415]

20

40

190-248

F92

90 [620]

64 [440]

20

45

269 max

F11, Class 1

60 [415]

30 [205]

20

45

121-174

F11, Class 2

70 [485]

40 [275]

20

30

143-207

F11, Class 3

75 [515]

45 [310]

20

30

156-207

F12, Class 1

60 [415]

32 [220]

20

45

121-174

F12, Class 2

70 [485]

40 [275]

20

30

143-207

F21

75 [515]

45 [310]

20

30

156-207

F22, Class 1

60 [415]

30 [205]

20

35

170 max

F22, Class 3

75 [515]

45 [310]

20

30

156-207

Austenitic Stainless Steels

F304

75 [515]C

30 [205]

30

50

...

F304L

70 [485]D

25 [170]

30

50

...

F316

75 [515]C

30 [205]

30

50

...

F316L

70 [485]D

25 [170]

30

50

...

F321

75 [515]

30 [205]

30

50

...

C. For sections over 5 in. [130 mm] in thickness, the minimum tensile strength shall be 70 ksi [485 MPa].
D. For sections over 5 in. [130 mm] in thickness, the minimum tensile strength shall be 65 ksi [450 MPa].