Steel A182 F22V
ASTM A182 F22V · UNS K31835
ASTM A182 F22V is a vanadium-modified 2.25Cr-1Mo forging steel (UNS K31835) developed for hydrogen-service reactor and heavy-wall vessel forgings, supplied quenched and tempered with simulated PWHT or step-cooling options.
Reference datasheet — A182 F22V is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the QT condition
A182 F22V tempers and conditions
A182 F22V is supplied in 4 conditions, soft to hard. QT is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Non-code intermediate softening state supplied on request for deep rough machining; must be re-austenitized, quenched and tempered before code acceptance. | 330 | 520 | 26 | 160 HB | 8 % IACS |
Q&T + simulated post-weld heat treatment | Test condition (and effective in-service condition) after the long cumulative PWHT of a heavy-wall reactor; strength drops slightly and must still meet the 585 MPa UTS minimum. | 455 | 620 | 23 | 12 HRC | 7.8 % IACS |
Q&T + step-cooling embrittlement qualification | Order this when the forging goes into a hydroprocessing reactor: same heat treatment as Q&T but with step-cooled Charpy transition-temperature shift limits and residual-element (J, X) restrictions. | 478 | 650 | 21 | 15 HRC | 7.8 % IACS |
QTDefault Quenched and tempered | Standard as-delivered condition for all A182 F22V forgings; meets 585–760 MPa UTS / 415 MPa min YS with 235 HBW max. | 480 | 655 | 22 | 205 HB | — |
What is A182 F22V?
ASTM A182 F22V is a vanadium-modified 2.25Cr-1Mo forging steel (UNS K31835) developed for hydrogen-service reactor and heavy-wall vessel forgings, supplied quenched and tempered with simulated PWHT or step-cooling options. It offers higher creep-rupture strength than standard F22 at 480 MPa yield, 655 MPa tensile, 22 % elongation and about 205 HB (94 HRB), with a listed service ceiling of 482 °C. The trade-offs are long, tightly controlled heat-treatment and PWHT cycles, mandatory hydrogen control in welding, and no inherent corrosion resistance — the process side is normally clad. Standard F22 is the simpler alternative where creep strength allows. A182 F22V has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). A182 F22V has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 59% of steel grades. Elongation at break is 22% and the elastic modulus is 207 GPa (30 Msi).
What is A182 F22V used for?
- Hydroprocessing reactor components
- Heavy-wall pressure vessel forgings
- Nozzles
Advantages
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 100% of steel grades
- Good corrosion resistance — 22/100, better than 90% of steel grades
- High service temperature — 482°C (900 °F), better than 89% of steel grades
A182 F22V properties
Typical room-temperature values for A182 F22V-QT; bars are the position among steel grades.
Physical3
A182 F22V has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
A182 F22V has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 59% of steel grades. Elongation at break is 22% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
A182 F22V is rated for continuous service to 482°C (900 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 73% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A182 F22V conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (22/100), better than 90% of steel grades.
Sustainability4
Producing a kilogram of A182 F22V takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability8
A182 F22V's machinability is fair (45/100, worse than 65% of steel grades); weldability fair (50/100); formability poor (30/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. A182 F22V is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A182 F22V
Is A182 F22V easy to machine?
Machines like a 200 HB Q&T Cr-Mo steel — rigid setups, coated carbide at ~90–130 m/min, positive rake and generous coolant; V/Nb carbides give moderate tool wear.
Can A182 F22V be welded?
SAW/SMAW with matching 2.25Cr-1Mo-V consumables, 200–250 °C preheat and interpass, strict hydrogen control, dehydrogenation soak, and 690–705 °C PWHT (long cumulative times must be simulated on test coupons).
Can A182 F22V be formed, bent or molded?
Hot forge at roughly 1200 → 950 °C with adequate reduction, then re-austenitize ~940–970 °C, liquid quench and temper ≥677 °C; cold forming is impractical.
A182 F22V chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C | 0.11 – 0.15 | 0.13 |
| Mn | 0.3 – 0.6 | 0.45 |
| Prestricted further (≤0.010) for step-cooled reactor forgings | ≤ 0.02 | 0.01 |
| S | ≤ 0.01 | 0 |
| Silow Si to limit temper embrittlement | ≤ 0.1 | 0.06 |
| Cr | 2 – 2.5 | 2.25 |
| Mo | 0.9 – 1.1 | 1 |
| V | 0.25 – 0.35 | 0.3 |
| Nblisted as Cb in ASTM | 0.02 – 0.07 | 0.03 |
| Ti | ≤ 0.03 | 0.01 |
| B | ≤ 0 | 5×10⁻⁴ |
| Ca | ≤ 0.02 | 0 |
| Fe | balance | — |
What surface finishes work on A182 F22V?
Not weather resistant — process side gets 309L/347 stainless weld overlay or strip cladding, external surfaces get high-temperature paint or aluminizing; keep hardness ≤235 HBW for wet H2S service.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel A182 F22V in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K31835
How much does A182 F22V cost?
A182 F22V is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
A182 F22V — frequently asked
What is A182 F22V used for?
A182 F22V is typically used for hydroprocessing reactor components, heavy-wall pressure vessel forgings and nozzles. In short: creep upgrade over F22; hydrogen-service reactor grade; heavy-wall forging steel.
What is the yield strength of A182 F22V?
A182 F22V has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 59% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is A182 F22V easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machines like a 200 HB Q&T Cr-Mo steel — rigid setups, coated carbide at ~90–130 m/min, positive rake and generous coolant; V/Nb carbides give moderate tool wear.
Can A182 F22V be welded?
With care — weldability is rated fair (50/100). SAW/SMAW with matching 2.25Cr-1Mo-V consumables, 200–250 °C preheat and interpass, strict hydrogen control, dehydrogenation soak, and 690–705 °C PWHT (long cumulative times must be simulated on test coupons).
What surface finishes work on A182 F22V?
Not weather resistant — process side gets 309L/347 stainless weld overlay or strip cladding, external surfaces get high-temperature paint or aluminizing; keep hardness ≤235 HBW for wet H2S service.
Can A182 F22V be formed, bent or molded?
Hot forge at roughly 1200 → 950 °C with adequate reduction, then re-austenitize ~940–970 °C, liquid quench and temper ≥677 °C; cold forming is impractical.
What is the maximum service temperature of A182 F22V?
A182 F22V is rated for continuous use to about 482°C (900 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A182 F22V-QT and A182 F22V-ANN?
QT is the default condition — standard as-delivered condition for all A182 F22V forgings; meets 585–760 MPa UTS / 415 MPa min YS with 235 HBW max. ANN: non-code intermediate softening state supplied on request for deep rough machining; must be re-austenitized, quenched and tempered before code acceptance. Yield strength is 480 MPa in QT versus 330 MPa in ANN.
How much does A182 F22V cost?
A182 F22V is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts (Grade F22V) — ASTM International (2024)
- ASTM A542/A542M Type D Class 4a — Quenched and Tempered Cr-Mo-V Pressure Vessel Plate — ASTM International (2019)
- ASTM A832/A832M Grade 22V — Cr-Mo-V Alloy Steel Plate for Elevated Temperature Service — ASTM International (2020)
- API RP 934-A — Materials and Fabrication of 2¼Cr-1Mo, 2¼Cr-1Mo-¼V, 3Cr-1Mo-¼V Heavy Wall Pressure Vessels — API (2019)
- ASME BPVC Section II Part D — Material Properties (allowable stresses, E, α, k for 2¼Cr-1Mo-V) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- GB/T 713 / NB/T 47008 — 12Cr2Mo1VR 12Cr2Mo1V — SAC / NB (2014)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.