Nickel Alloy Alloy 22 FRG-ANN
Heat-treated state
UNS N06022 · EN 2.4602, NiCr21Mo14W · also Hastelloy C-22
FRG-ANN = forged and solution annealed
For valve bodies, flanges and heavy fittings; properties essentially those of annealed plate with slightly lower ductility in thick sections.
Values for the FRG-ANN condition
Other Alloy 22 tempers and conditions
Alloy 22 is listed in 6 conditions; see the grade overview at Alloy 22.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As cast | Cast counterpart for pump casings, valve bodies and impellers; lower strength and ductility than wrought, needs solution treatment for corrosion performance. | 320 | 620 | 28 | 200 HB | 1.5 % IACS |
FRG-ANNThis page Forged and solution annealed | For valve bodies, flanges and heavy fittings; properties essentially those of annealed plate with slightly lower ductility in thick sections. | 385 | 780 | 55 | 198 HB | 1.5 % IACS |
ANNDefault Annealed | Standard stocked condition for plate, sheet, pipe, tube and fittings; maximum corrosion resistance and ductility. | 400 | 800 | 62 | 88 HRB | — |
Hot-worked / hot-finished bar and billet | Hot-finished bar or billet supplied without final solution anneal; use where slightly higher strength is acceptable and machining stock is generous. | 400 | 790 | 55 | 12 HRC | 1.5 % IACS |
As-welded deposit | All-weld-metal condition for matching filler deposits and overlays; used as-welded with no PWHT required. | 480 | 760 | 40 | 210 HB | 1.5 % IACS |
Cold drawn | Pick for fasteners, springs, small-diameter tubing and shafts needing higher strength and tighter tolerances; ductility and formability reduced. | 800 | 1,000 | 25 | 30 HRC | — |
What is Alloy 22 FRG-ANN?
Alloy 22 FRG-ANN is Alloy 22 heat treated to FRG-ANN — for valve bodies, flanges and heavy fittings; properties essentially those of annealed plate with slightly lower ductility in thick sections. Alloy 22 FRG-ANN has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 780 MPa (113 ksi) — weaker than 51% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 206 GPa (29.9 Msi). Alloy 22 FRG-ANN has a density of 8.69 g/cm³ (0.314 lb/in³), heavier than 72% of nickel alloy grades. It melts at 1,357°C (2,475 °F). ANN is the default condition FabDigit quotes; FRG-ANN is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 55%, better than 93% of nickel alloy grades
- Good corrosion resistance — 92/100, better than 91% of nickel alloy grades
- Readily welded — 85/100, better than 83% of nickel alloy grades
Alloy 22 FRG-ANN properties
Typical room-temperature values for Alloy 22 FRG-ANN; 22 are specific to this condition. Other listed values are Alloy 22 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Alloy 22 FRG-ANN has a density of 8.69 g/cm³ (0.314 lb/in³), heavier than 72% of nickel alloy grades. It melts at 1,357°C (2,475 °F).
Mechanical15
Alloy 22 FRG-ANN has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 780 MPa (113 ksi) — weaker than 51% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
Alloy 22 FRG-ANN is rated for continuous service to 675°C (1,247 °F). It conducts heat at 10.1 W/m·K (5.84 BTU/hr·ft·°F), worse than 84% of nickel alloy grades. Thermal expansion is 12.4 µm/m·K (6.89 µin/in·°F).
Electrical3
Alloy 22 FRG-ANN conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 91% of nickel alloy grades.
Sustainability4
Producing a kilogram of Alloy 22 FRG-ANN takes about 145 MJ of energy and emits 12 kg of CO₂ — less than 77% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Alloy 22 FRG-ANN's machinability is poor (15/100, worse than 76% of nickel alloy grades); weldability excellent (85/100); formability good (68/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Alloy 22 FRG-ANN
Is Alloy 22 easy to machine?
Treat as a gummy, work-hardening nickel alloy: rigid setups, positive-rake sharp carbide, slow speeds with heavy feed, generous flood coolant and no dwelling to avoid glazing.
Can Alloy 22 be welded?
Very good weldability by GTAW/GMAW/SMAW with matching ERNiCrMo-10 filler, low heat input, stringer beads and interpass cooling below ~100 °C; no post-weld heat treatment needed for most service.
Can Alloy 22 be formed, bent or molded?
Cold forms well but work-hardens fast — allow ~2× the power of stainless, use intermediate anneals at 1120-1150 °C with rapid quench; hot work 950-1200 °C then solution anneal.
What surface finishes work on Alloy 22?
Pickle or grind off heat tint and oxide before service (heat tint degrades corrosion resistance); electropolishing or mechanical polishing gives high-purity surfaces — anodizing not applicable.
Alloy 22 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 |
|---|---|---|
| Cr | 20 – 22.5 | 21 |
| Mo | 12.5 – 14.5 | 13.5 |
| W | 2.5 – 3.5 | 3 |
| Fe | 2 – 6 | 4 |
| Co | ≤ 2.5 | 1 |
| Mn | ≤ 0.5 | — |
| V | ≤ 0.35 | — |
| Si | ≤ 0.08 | — |
| C | ≤ 0.02 | — |
| P | ≤ 0.02 | — |
| S | ≤ 0.02 | — |
| Nibalance, typically 55-59 % | balance | — |
Alloy 22 FRG-ANN — frequently asked
What is Alloy 22 FRG-ANN used for?
Alloy 22 FRG-ANN is typically used for pharmaceutical reactors, flue gas desulfurization, waste treatment and chemical piping. In short: widest-range corrosion nickel; handles oxidizing and reducing acids; very good weldability, poor machinability.
What is the yield strength of Alloy 22 FRG-ANN?
Alloy 22 FRG-ANN has a typical yield strength of 385 MPa (55.8 ksi) and a tensile strength of 780 MPa (113 ksi) — weaker than 51% of nickel alloy grades. Strength varies by condition: see the 6 listed tempers.
Is Alloy 22 FRG-ANN easy to machine?
Not especially — machinability is rated poor (15/100, worse than 76% of nickel alloy grades). Treat as a gummy, work-hardening nickel alloy: rigid setups, positive-rake sharp carbide, slow speeds with heavy feed, generous flood coolant and no dwelling to avoid glazing.
Can Alloy 22 FRG-ANN be welded?
Yes — weldability is rated excellent (85/100). Very good weldability by GTAW/GMAW/SMAW with matching ERNiCrMo-10 filler, low heat input, stringer beads and interpass cooling below ~100 °C; no post-weld heat treatment needed for most service.
What surface finishes work on Alloy 22 FRG-ANN?
Pickle or grind off heat tint and oxide before service (heat tint degrades corrosion resistance); electropolishing or mechanical polishing gives high-purity surfaces — anodizing not applicable.
Can Alloy 22 FRG-ANN be formed, bent or molded?
Cold forms well but work-hardens fast — allow ~2× the power of stainless, use intermediate anneals at 1120-1150 °C with rapid quench; hot work 950-1200 °C then solution anneal.
What is the maximum service temperature of Alloy 22 FRG-ANN?
Alloy 22 FRG-ANN is rated for continuous use to about 675°C (1,247 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Alloy 22-ANN and Alloy 22-CD?
ANN is the default condition — standard stocked condition for plate, sheet, pipe, tube and fittings; maximum corrosion resistance and ductility. CD: pick for fasteners, springs, small-diameter tubing and shafts needing higher strength and tighter tolerances; ductility and formability reduced. Yield strength is 400 MPa in ANN versus 800 MPa in CD.
Sources
- ASTM B575 — Ni-Cr-Mo alloy plate, sheet and strip (UNS N06022) — ASTM International (2023)
- ASTM B574 / B564 / B622 / B619 — bar, forgings, seamless and welded pipe & tube — ASTM International (2023)
- ASTM A494 — Castings, Nickel and Nickel Alloy (grade CX2MW) — ASTM International (2020)
- HASTELLOY C-22 alloy principal features and physical properties — Haynes International (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- AWS A5.14 / A5.11 — ERNiCrMo-10 and ENiCrMo-10 filler metals — AWS (2018)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.