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ASTM A182 F5 flanges are alloy steel flanges made up of 5Cr 1/2Mo forged alloy steel used in high temperature pipes. With the chromium content of these flanges lying between 4 and 6%, the flanges offer enhanced resistance to oxidation and sulfidation when compared with carbon steel and low-chromium flanges like F11. The ASTM A182 F5 flanges find application in refinery, petrochemicals, power and process pipes when chrome-moly steels are used. Some of the types available are: Weld Neck Flanges, Slip On Flanges, Blind Flanges, Socket Weld Flanges, Threaded Flanges and Lap Joint Flanges. Solitaire Overseas ships ASTM A182 F5 flanges with EN 10204 3.1 certificates and full material traceability for domestic and export orders.
| Parameter | Detail |
|---|---|
|
Material Specification |
ASTM A182 / ASME SA182 Grade F5 |
|
Alloy Designation |
5Cr 1/2Mo, UNS K41545, Werkstoff 1.7362 |
|
Dimensional Standard |
ASME B16.5 for NPS 1/2 to 24. ASME B16.47 for large diameter sizes |
|
Pressure Class |
Class 150, 300, 600, 900, 1500, and 2500 where the flange type is rated in B16.5 |
|
Flange Types |
Weld neck, slip on, blind, socket weld, threaded, lap joint. Orifice flanges (ASME B16.36) and spectacle blind flanges (ASME B16.48) are separate products. Link to their pages when they go live |
|
Face Type |
Raised face (RF), flat face (FF), ring type joint (RTJ) |
|
Heat Treatment |
Annealed, or normalised and tempered, per ASTM A182 |
|
Testing |
Chemical and mechanical tests, hardness, PMI, UT and MPI on request |
|
Documents |
EN 10204 3.1 MTC, 3.2 with third party inspection on request |
| Grade | C | Mn | P max | S max | Si | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
|
A182 F5 |
0.15 max |
0.30 to 0.60 |
0.030 |
0.030 |
0.50 max |
4.00 to 6.00 |
0.44 to 0.65 |
0.50 max |
| Grade | Tensile min MPa (ksi) | Yield min MPa (ksi) | Elongation min % | Reduction of area min % | Hardness HBW |
|---|---|---|---|---|---|
|
A182 F5 |
485 (70) |
275 (40) |
20 |
35 |
217 max |
| Item | Detail |
|---|---|
|
Forged flange and fitting |
ASTM A182 F5 |
|
Alloy |
5Cr 1/2Mo |
|
UNS |
K41545 |
|
Werkstoff |
1.7362 |
|
Matching pipe |
ASTM A335 P5 |
|
Matching butt weld fitting |
ASTM A234 WP5 |
|
Matching plate |
ASTM A387 Grade 5 |
| Nominal Pipe Size (NPS) | Class 150 Flange | Class 300 Flange | Class 600 Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # Bolts | Dia (in) | Len 1/16" RF | Len RTJ | # Bolts | Dia (in) | Len 1/16" RF | Len RTJ | # Bolts | Dia (in) | Len 1/4" RF | Len RTJ | |
|
1/2" |
4 |
0.50 |
2-1/4" |
– |
4 |
0.50 |
2-1/2" |
3" |
4 |
0.50 |
3" |
3" |
|
3/4" |
4 |
0.50 |
2-1/2" |
– |
4 |
0.63 |
3" |
3-1/2" |
4 |
0.63 |
3-1/2" |
3-1/2" |
|
1" |
4 |
0.50 |
2-1/2" |
3" |
4 |
0.63 |
3" |
3-1/2" |
4 |
0.63 |
3-1/2" |
3-1/2" |
|
1-1/4" |
4 |
0.50 |
2-3/4" |
3-1/4" |
4 |
0.63 |
3-1/4" |
3-3/4" |
4 |
0.63 |
3-3/4" |
3-3/4" |
|
1-1/2" |
4 |
0.50 |
2-3/4" |
3-1/4" |
4 |
0.75 |
3-1/2" |
4" |
4 |
0.75 |
4-1/4" |
4-1/4" |
|
2" |
4 |
0.63 |
3-1/4" |
3-3/4" |
8 |
0.63 |
3-1/2" |
4" |
8 |
0.63 |
4-1/4" |
4-1/4" |
|
2-1/2" |
4 |
0.63 |
3-1/2" |
4" |
8 |
0.75 |
4" |
4-1/2" |
8 |
0.75 |
4-3/4" |
4-3/4" |
|
3" |
4 |
0.63 |
3-1/2" |
4" |
8 |
0.75 |
4-1/4" |
4-3/4" |
8 |
0.75 |
5" |
5" |
|
3-1/2" |
8 |
0.63 |
3-1/2" |
4" |
8 |
0.75 |
4-1/4" |
5" |
8 |
0.88 |
5-1/2" |
5-1/2" |
|
4" |
8 |
0.63 |
3-1/2" |
4" |
8 |
0.75 |
4-1/2" |
5" |
8 |
0.88 |
5-3/4" |
5-3/4" |
|
5" |
8 |
0.75 |
3-3/4" |
4-1/4" |
8 |
0.75 |
4-3/4" |
5-1/4" |
8 |
1.00 |
6-1/2" |
6-1/2" |
|
6" |
8 |
0.75 |
4" |
4-1/2" |
12 |
0.75 |
4-3/4" |
5-1/2" |
12 |
1.00 |
6-3/4" |
6-3/4" |
|
8" |
8 |
0.75 |
4-1/4" |
4-3/4" |
12 |
0.88 |
5-1/2" |
6" |
12 |
1.13 |
7-1/2" |
7-3/4" |
|
10" |
12 |
0.88 |
4-1/2" |
5" |
16 |
1.00 |
6-1/4" |
6-3/4" |
16 |
1.25 |
8-1/2" |
8-1/2" |
|
12" |
12 |
0.88 |
4-3/4" |
5-1/4" |
16 |
1.13 |
6-3/4" |
7-1/4" |
20 |
1.25 |
8-3/4" |
8-3/4" |
|
14" |
12 |
1.00 |
5-1/4" |
5-3/4" |
20 |
1.13 |
7" |
7-1/2" |
20 |
1.38 |
9-1/4" |
9-1/4" |
|
16" |
16 |
1.00 |
5-1/4" |
5-3/4" |
20 |
1.25 |
7-1/2" |
8" |
20 |
1.50 |
10" |
10" |
|
18" |
16 |
1.13 |
5-3/4" |
6-1/4" |
24 |
1.25 |
7-3/4" |
8-1/4" |
20 |
1.63 |
10-3/4" |
10-3/4" |
|
20" |
20 |
1.13 |
6-1/4" |
6-3/4" |
24 |
1.25 |
8" |
8-3/4" |
24 |
1.63 |
11-1/4" |
11-1/2" |
|
24" |
20 |
1.25 |
6-3/4" |
7-1/4" |
24 |
1.50 |
9" |
10" |
24 |
1.88 |
13" |
13-1/4" |
ASTM A182 F5 flanges are forged alloy steel flanges designed for high temperature and pressure piping applications.
ASTM A182 F5 is a chromium-molybdenum (chrome-moly) alloy steel with about 5 percent chromium and 0.5 percent molybdenum.
F5 and F5a are separate 5Cr 0.5Mo forging grades with different composition limits and different mechanical property requirements.
Yes. F5 resists oxidation and keeps its strength at elevated temperature. The design code sets the limit for each line.
Their pressure rating depends on the flange class, size, design temperature, and applicable ASME standards.
Yes, ASTM A182 F5 flanges can be manufactured in pressure classes from 150 to 2500, subject to size and standard requirements.
Minimum tensile strength is 485 MPa (70 ksi) and minimum yield strength is 275 MPa (40 ksi), with 20 percent elongation and 35 percent reduction of area.
F5 has 4 to 6 percent chromium. F9 has 8 to 10 percent for higher heat and oxidation resistance, and F11 has only 1 to 1.5 percent.
Contact Solitaire Overseas for expert guidance and the right ASTM A182 F5 flange for your project, or send your enquiry here.