Tubewell Steel & Engg. Co. is a leading manufacturer and stockist specializing in Alloy Steel Pipes, Tubes, Fittings and Flanges for critical industrial applications.
2.25% Chromium – 1% Molybdenum socket weld and threaded forged fittings with high creep strength for boilers, steam lines and hydroprocessing units.
Tubewell Steel & Engg. Co. is a manufacturer, stockist and supplier of ASTM A182 F22 forged fittings in Mumbai, India. With 2¼Cr-1Mo chemistry, F22 delivers higher creep-rupture strength than F11 and is the preferred fitting grade for A335 P22 steam, boiler and hydrogen service piping.
Higher creep strength for demanding steam and hydrogen service
ASTM A182 F22 is a 2.25% chromium – 1% molybdenum ferritic alloy steel forging grade. The higher alloy content compared to F11 gives superior creep-rupture strength, better resistance to high-temperature hydrogen attack and good oxidation resistance at temperatures up to about 600°C (1110°F). F22 is offered in Class 1 and Class 3, with Class 3 being the higher-strength option most often used for ASME B16.11 socket weld and threaded fittings.
Our F22 forged fittings are produced from certified forgings or forged bar, precision machined and annealed or normalized and tempered at a minimum of 675°C (1250°F) as required by ASTM A182. Each lot is hardness tested and 100% PMI verified, then dispatched with EN 10204 3.1 certificates. IBR documentation, NACE MR0175 compliance and third-party inspection are available on request.
Standard supply range for ASTM A182 F22 forged fittings
| Parameter | Details |
|---|---|
| Material Standard | ASTM A182, ASME SA182 |
| Grade | F22 Class 1, F22 Class 3 (UNS K21590) |
| Dimension Standard | ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95, MSS SP-97, BS 3799 |
| Size Range | 1/8" NB to 4" NB |
| Socket Weld Class | Class 3000, 6000, 9000 |
| Threaded Class | Class 2000, 3000, 6000 |
| Thread Type | NPT (ASME B1.20.1), BSPT, BSPP |
| Types | 90° & 45° Elbow, Tee, Cross, Full / Half Coupling, Cap, Union, Boss, Plug, Bushing, Swage Nipple, Olets |
| Manufacturing | Closed-die forged, CNC machined |
| Heat Treatment | Annealed or Normalized & Tempered (tempering min. 675°C / 1250°F) |
| Surface Finish | Shot blasted, anti-rust oil coated |
| Marking | As per MSS SP-25 – A182 F22, class, size, heat no. |
| Testing | Hardness, PMI, Tensile, Dimensional, Thread Gauging, UT / DPT / MPI on request |
| Certificates | EN 10204 3.1 / 3.2, IBR Certificate, TPI Reports |
International equivalents of A182 F22
| Grade | ASTM | UNS | EN | W.Nr. | Nominal Alloy |
|---|---|---|---|---|---|
| F22 Class 1 | A182 F22 Cl.1 | K21590 | 10CrMo9-10 / 11CrMo9-10 | 1.7380 / 1.7383 | 2.25Cr – 1Mo |
| F22 Class 3 | A182 F22 Cl.3 | K21590 | 10CrMo9-10 / 11CrMo9-10 | 1.7380 / 1.7383 | 2.25Cr – 1Mo |
Weight %, as per ASTM A182
| Grade | C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|---|
| F22 Class 1 | 0.05 – 0.15 | 0.30 – 0.60 | 0.040 max | 0.040 max | 0.50 max | 2.00 – 2.50 | 0.87 – 1.13 |
| F22 Class 3 | 0.05 – 0.15 | 0.30 – 0.60 | 0.040 max | 0.040 max | 0.50 max | 2.00 – 2.50 | 0.87 – 1.13 |
Minimum values at room temperature as per ASTM A182
| Grade | Tensile Strength | Yield Strength (0.2%) | Elongation | Reduction of Area | Hardness (HBW) |
|---|---|---|---|---|---|
| F22 Class 1 | 415 MPa (60 ksi) min | 205 MPa (30 ksi) min | 20% min | 35% min | 170 max |
| F22 Class 3 | 515 MPa (75 ksi) min | 310 MPa (45 ksi) min | 20% min | 30% min | 156 – 207 |
Typical values (for reference)
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.83 g/cm³ | 0.283 lb/in³ |
| Melting Range | 1450 – 1510 °C | 2640 – 2750 °F |
| Modulus of Elasticity | 205 GPa | 29.7 × 10³ ksi |
| Thermal Conductivity (100°C) | 36 W/m·K | 20.8 BTU/h·ft·°F |
| Mean Thermal Expansion (20–300°C) | 12.6 µm/m·°C | 7.0 µin/in·°F |
| Specific Heat | 0.46 J/g·°C | 0.11 BTU/lb·°F |
| Max. Service Temperature | ≈ 600 °C | ≈ 1110 °F |
F22 threaded fittings as per ASME B16.11 – centre to end (mm)
| NPS | 90° Elbow / Tee / Cross (A) – Class 2000 | 90° Elbow / Tee / Cross (A) – Class 3000 | 90° Elbow / Tee / Cross (A) – Class 6000 | Coupling Length (W) – 3000 / 6000 |
|---|---|---|---|---|
| 1/8" | 21 | 21 | 25 | 32 |
| 1/4" | 21 | 25 | 28 | 35 |
| 3/8" | 25 | 28 | 33 | 38 |
| 1/2" | 28 | 33 | 38 | 48 |
| 3/4" | 33 | 38 | 44 | 51 |
| 1" | 38 | 44 | 51 | 60 |
| 1 1/4" | 44 | 51 | 60 | 67 |
| 1 1/2" | 51 | 60 | 64 | 79 |
| 2" | 60 | 64 | 83 | 86 |
| 2 1/2" | 76 | 83 | 95 | 92 |
| 3" | 86 | 95 | 106 | 108 |
| 4" | 106 | 114 | 114 | 121 |
A = Centre to end. Threaded Class 2000 is used with SCH 80 pipe, Class 3000 with SCH 160 and Class 6000 with XXS pipe. All dimensions in mm and nominal; tolerances as per ASME B16.11.
Where ASTM A182 F22 forged fittings are used
Main steam and hot reheat drains, vents and warm-up lines.
Hydrocracker and hydrotreater small-bore hydrogen piping.
Reformer and cracker connections at elevated temperature.
Superheater and reheater header drains and sampling points.
Nozzle, vent and drain connections on Cr-Mo vessels.
Ammonia synthesis loops needing hydrogen-attack resistance.
Quality you can verify on every heat
Large inventory for fast dispatch
MTC EN 10204 3.1 / 3.2
Positive material identification
Pan-India & export shipping
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