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Stainless Steel 316 Flanges | Stainless Steel 316L Flanges

Welding neck flanges made of ASTM A182 Gr. F316, ASME B16.5 12" Class 300 RF SCH40, supplied to Israel.

  • Description

Standards & Materials

Compared to SS 304/ 304L flanges, stainless steel 316/ 316L flanges have enhanced resistance to pitting corrosion in chloride environments due to the addition of molybdenum. The letter “L” denotes low carbon content. According to ASME B16.5 and ASME B16.47, SS 316/ 316L flanges may be made from forgings of ASTM A182 Grade F316 or F316L, castings of ASTM A351 Grades CF8M or CF3M, and plates of ASTM A240 Grades 316 or 316L. Designated with nominal composition of 16Cr-12Ni-2Mo, the flange materials can be classified into two groups based on its pressure-temperature ratings: Group 2.2 – including ASTM A182 F316, ASTM A351 CF8M & CF3M, and ASTM A240 Gr. 316; Group 2.3 – including ASTM A182 F316L and ASTM A240 Gr. 316L.

SS 316/ 316L flanges can be furnished in diverse types such as welding neck, slip on, blind, socket welding, lap joint, threaded, and reducing, etc. Flanges of ASME B16.5 may be provided in sizes 1/2″ through 24″ in Class 150, 300, 400, 600, 900, 1500, 2500. Flanges of ASME B16.47 Series A may be provided in sizes 26″ through 60″ in Class 150, 300, 400, 600, 900; while flanges of ASME B16.47 Series B may be provided in sizes 26″ through 60 in Class 75, 150, 300, 400, 600, 900.

Manufacture & Heat Treatment

Stainless steel 316/ 316L flanges may be made by a hot forging or casting process. Blind or slip-on plate flanges without hub may be machined directly from plates. The flanges shall be solution treated at a temperature no less than 1900°F [1040°C], followed by a quench in cold water or other rapid cooling means.

Chemical Composition Requirements

ElementF316F316L
C≤0.08≤0.03
Mn≤2.00≤2.00
P≤0.045≤0.045
S≤0.030≤0.030
Si≤1.00≤1.00
Ni10.0-14.010.0-15.0
Cr16.0-18.016.0-18.0
Mo2.00-3.002.00-3.00
N≤0.10≤0.10
*Composition requirements for ASTM A182 Gr. F316 & F316L.

ElementCF8MCF3M
C≤0.08≤0.03
Mn≤1.50≤1.50
P≤0.04≤0.04
S≤0.04≤0.04
Si≤1.50≤1.50
Ni9.0-12.09.0-13.0
Cr18.0-21.017.0-21.0
Mo2.0-3.02.0-3.0
*Composition requirements for ASTM A351 Gr. CF8M & CF3M.

Element316316L
C≤0.08≤0.03
Mn≤2.00≤2.00
P≤0.045≤0.045
S≤0.030≤0.030
Si≤0.75≤0.75
Ni10.0-14.010.0-14.0
Cr16.0-18.016.0-18.0
Mo2.00-3.002.00-3.00
N≤0.10≤0.10
*Composition requirements for ASTM A240 Gr. 316 & 316L.

Mechanical Properties

Mechanical
Requirements
F316F316L
Tensile Strength
min. MPa [ksi]
515 [75]485 [70]
Yield Strength
min. MPa [ksi]
205 [30]170 [25]
Elongation in
2", min. %
3030
Reduction of
area, min. %
5050
*Tensile requirements for ASTM A182 F316 & F316L.

Mechanical
Requirements
CF8MCF3M
Tensile Strength
min. MPa [ksi]
485 [70]485 [70]
Yield Strength
min. MPa [ksi]
205 [30]205 [30]
Elongation in
2", min. %
3030
*Tensile requirements for ASTM A351 CF8M & CF3M.

Mechanical
Requirements
Gr. 316Gr. 316L
Tensile Strength
min. MPa [ksi]
515 [75]485 [70]
Yield Strength
min. MPa [ksi]
205 [30]170 [25]
Elongation in
2", min. %
4040
Brinell Hardness
max. HBW
217217
Rockwell Hardness
max. HRBW
9595
*Tensile & hardness requirements for ASTM A240 Gr. 316 & 316L.

Pressure-Temperature Ratings

Temp.
°F
75#
psi
150#
psi
300#
psi
-20~100140275720
200120235620
300105215560
400100195515
50085170480
60070140450
65060125440
700-110435
750-95425
800-80420
850-65420
900-50415
950-35385
1000-20365
1050--360
1100--305
1150--235
1200--185
1250--145
1300--115
1350--95
1400--75
1450--60
1500--40
*Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.2, for Class 75, Class 150, and Class 300.

Temp.
°F
400#
psi
600#
psi
900#
psi
-20~10096014402160
20082512401860
30074511201680
40068510251540
5006359551435
6006009001355
6505908851325
7005808701305
7505708551280
8005658451265
8505558351255
9005558301245
9505157751160
10004857251090
10504807201080
1100405610915
1150315475710
1200245370555
1250195295440
1300155235350
1350130190290
1400100150225
145080115175
15005585125
*Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.2, for Class 400, Class 600, and Class 900.

Temp.
°F
1500#
psi
2500#
psi
-20~10036006000
20030955160
30027954660
40025704280
50023903980
60022553760
65022103680
70021703620
75021353560
80021103520
85020903480
90020753460
95019303220
100018203030
105018003000
110015252545
115011851970
12009251545
12507351230
1300585970
1350480800
1400380630
1450290485
1500205345
*Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.2, for Class 1500 and Class 2500.

Temp.
°F
75#
psi
150#
psi
300#
psi
-20~100115230600
200100195510
30085175455
40080160420
50075150395
60070140370
65060125365
700-110360
750-95355
800-80345
850-65340
Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.3, for Class 75, Class 150, and Class 300.

Temp.
°F
400#
psi
600#
psi
900#
psi
-20~10080012001800
20068010201535
3006109101370
4005608401260
5005257851180
6004957451115
6504857301095
7004807201080
7504707051060
8004606901035
8504506751015
*Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.3, for Class 400, Class 600, and Class 900.

Temp.
°F
1500#
psi
2500#
psi
-20~10030005000
20025554260
30022803800
40021003500
50019703280
60018603100
65018253040
70018003000
75017652940
80017302880
85016902820
*Pressure-Temperature ratings for SS 316/ 316L flange materials in Group 2.3, for Class 1500 and Class 2500.

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