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ASTM A182 F1 is made from forged carbon-molybdenum steel, C-1/2Mo, and does not contain any chromium. Molybdenum improves the strength properties at elevated temperatures when compared to carbon steel and therefore works well where the temperatures are higher than those that would be possible using A105. It works for moderately elevated temperature conditions, but in case of extended use at elevated temperatures, go for F11, F22 or F91 since the carbon-molybdenum steel is susceptible to graphitisation. Available flange types are weld neck, slip on, blind, socket, threaded and lap joint flanges. Solitaire Overseas supplies F1 flanges with EN 10204 3.1 certification and material traceability.
| Parameter | Detail |
|---|---|
|
Material specification |
ASTM A182 / ASME SA182 Grade F1 |
|
Alloy |
C 1/2Mo (carbon molybdenum), UNS K12822, Werkstoff 1.5415 |
|
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 |
|
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 |
|---|---|---|---|---|---|---|---|
|
A182 F1 |
0.28 max |
0.60 to 0.90 |
0.045 |
0.045 |
0.15 to 0.35 |
Not required |
0.44 to 0.65 |
| Grade | Tensile Strength min, MPa (ksi) | Yield Strength min, MPa (ksi) | Elongation min, % | Reduction of Area min, % | Hardness, HBW |
|---|---|---|---|---|---|
|
A182 F1 |
485 (70) |
275 (40) |
20 |
30 |
143 to 192 |
| Item | Detail |
|---|---|
|
Forged flange and fitting |
ASTM A182 F1 |
|
Alloy |
C 1/2Mo |
|
UNS |
K12822 |
|
Werkstoff |
1.5415 (16Mo3) |
|
Matching pipe |
ASTM A335 P1 |
|
Matching butt weld fitting |
ASTM A234 WP1 |
|
Matching plate |
ASTM A204 |
| Nominal Pipe Size (NPS) | Flange Outside Dia (OD) | Flange Thickness (T) | Hub Dia at Base (X) | Length Thru Hub (Y) | Number of Bolts | Bolt Hole Dia | Bolt Circle Dia (PCD) |
|---|---|---|---|---|---|---|---|
|
1/2" |
3.50 in (88.9 mm) |
0.44 in (11.2 mm) |
1.19 in (30.2 mm) |
1.88 in (47.8 mm) |
4 |
0.62 in (15.9 mm) |
2.38 in (60.5 mm) |
|
1" |
4.25 in (108.0 mm) |
0.56 in (14.2 mm) |
1.94 in (49.3 mm) |
2.19 in (55.6 mm) |
4 |
0.62 in (15.9 mm) |
3.12 in (79.2 mm) |
|
2" |
6.00 in (152.4 mm) |
0.75 in (19.1 mm) |
3.06 in (77.7 mm) |
2.50 in (63.5 mm) |
4 |
0.75 in (19.1 mm) |
4.75 in (120.7 mm) |
|
4" |
9.00 in (228.6 mm) |
0.94 in (23.9 mm) |
5.31 in (134.9 mm) |
3.00 in (76.2 mm) |
8 |
0.75 in (19.1 mm) |
7.50 in (190.5 mm) |
|
6" |
11.00 in (279.4 mm) |
1.00 in (25.4 mm) |
7.56 in (192.0 mm) |
3.50 in (88.9 mm) |
8 |
0.88 in (22.4 mm) |
9.50 in (241.3 mm) |
| Nominal Pipe Size (NPS) | Flange Outside Dia (OD) | Flange Thickness (T) | Hub Dia at Base (X) | Length Thru Hub (Y) | Number of Bolts | Bolt Hole Dia | Bolt Circle Dia (PCD) |
|---|---|---|---|---|---|---|---|
|
1/2" |
3.50 in (88.9 mm) |
0.44 in (11.2 mm) |
1.19 in (30.2 mm) |
0.62 in (15.7 mm) |
4 |
0.62 in (15.9 mm) |
2.38 in (60.5 mm) |
|
1" |
4.25 in (108.0 mm) |
0.56 in (14.2 mm) |
1.94 in (49.3 mm) |
0.69 in (17.5 mm) |
4 |
0.62 in (15.9 mm) |
3.12 in (79.2 mm) |
|
2" |
6.00 in (152.4 mm) |
0.75 in (19.1 mm) |
3.06 in (77.7 mm) |
0.88 in (22.4 mm) |
4 |
0.75 in (19.1 mm) |
4.75 in (120.7 mm) |
|
4" |
9.00 in (228.6 mm) |
0.94 in (23.9 mm) |
5.31 in (134.9 mm) |
1.31 in (33.3 mm) |
8 |
0.75 in (19.1 mm) |
7.50 in (190.5 mm) |
|
6" |
11.00 in (279.4 mm) |
1.00 in (25.4 mm) |
7.56 in (192.0 mm) |
1.56 in (39.6 mm) |
8 |
0.88 in (22.4 mm) |
9.50 in (241.3 mm) |
| Temperature (°F) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|---|
|
-20 to 100 |
265 |
695 |
925 |
1390 |
2085 |
3470 |
5785 |
|
200 |
260 |
680 |
905 |
1360 |
2035 |
3395 |
5660 |
|
300 |
230 |
655 |
870 |
1305 |
1955 |
3260 |
5435 |
|
400 |
200 |
640 |
855 |
1280 |
1920 |
3200 |
5330 |
|
500 |
170 |
620 |
830 |
1245 |
1865 |
3105 |
5180 |
|
600 |
140 |
605 |
805 |
1210 |
1815 |
3025 |
5040 |
|
650 |
125 |
590 |
785 |
1175 |
1765 |
2940 |
4905 |
|
700 |
110 |
570 |
755 |
1135 |
1705 |
2840 |
4730 |
|
750 |
95 |
530 |
710 |
1065 |
1595 |
2660 |
4430 |
|
800 |
80 |
510 |
675 |
1015 |
1525 |
2540 |
4230 |
|
850 |
65 |
485 |
650 |
975 |
1460 |
2435 |
4060 |
|
900 |
50 |
450 |
600 |
900 |
1350 |
2245 |
3745 |
|
950 |
35 |
350 |
465 |
700 |
1045 |
1740 |
2900 |
|
1000 |
20 |
280 |
375 |
560 |
835 |
1405 |
2345 |
ASTM A182 F1 flanges are forged carbon-molybdenum steel flanges used in elevated-temperature piping, with about 0.5 percent molybdenum and no required chromium.
ASTM A182 F1 is a carbon-molybdenum steel with 0.44 to 0.65 percent molybdenum and no required chromium.
F1 has better creep strength than plain carbon steel at moderately elevated temperatures. For long hot service choose F11 or F22.
ASTM A182 F1 maintains useful mechanical strength at elevated temperatures and is commonly used in steam and process piping.
It offers limited oxidation resistance and is not intended for severe oxidation environments like chromium-containing alloy steels.
ASTM A182 F1 forgings are generally supplied in the normalized and tempered or annealed condition, as specified by the applicable ASTM A182 requirements.
Yes, ASTM A182 F1 flanges can be welded using suitable welding procedures, filler materials and preheating requirements.
The UNS number is K12822 and the Werkstoff number is 1.5415. The matching pipe is A335 P1 and the matching fitting is A234 WP1.
Choose F11 or F22 when the line runs hot for long periods, because carbon-molybdenum steel can graphitise. The design code and temperature decide the grade.
Contact Solitaire Overseas for expert guidance and the right ASTM A182 F1 flange for your project, or send your enquiry here.