Nickel Alloy Alloy 22 Cast
Grade
UNS N06022 · EN 2.4602, NiCr21Mo14W · also Hastelloy C-22
Cast = as cast
Cast counterpart for pump casings, valve bodies and impellers; lower strength and ductility than wrought, needs solution treatment for corrosion performance.
Values for the Cast 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 |
|---|---|---|---|---|---|---|
CastThis page 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 |
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 Cast?
Alloy 22 Cast is Alloy 22 in the Cast grade — cast counterpart for pump casings, valve bodies and impellers; lower strength and ductility than wrought, needs solution treatment for corrosion performance. Alloy 22 Cast has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi). Alloy 22 Cast 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; Cast is available on request or by drawing note.
Advantages
- Good corrosion resistance — 88/100, better than 81% of nickel alloy grades
Limitations
- Poor heat conductor — 9.8 W/m·K (5.66 BTU/hr·ft·°F), worse than 92% of nickel alloy grades
- Limited formability — 15/100, worse than 81% of nickel alloy grades
Alloy 22 Cast properties
Typical room-temperature values for Alloy 22 Cast; 23 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 Cast 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 Cast has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
Alloy 22 Cast is rated for continuous service to 650°C (1,202 °F). It conducts heat at 9.8 W/m·K (5.66 BTU/hr·ft·°F), worse than 92% of nickel alloy grades. Thermal expansion is 12.4 µm/m·K (6.89 µin/in·°F).
Electrical3
Alloy 22 Cast conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 81% of nickel alloy grades.
Sustainability4
Producing a kilogram of Alloy 22 Cast 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 Cast's machinability is not recommended (14/100, worse than 81% of nickel alloy grades); weldability very good (78/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Alloy 22 Cast
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 Cast — frequently asked
What is Alloy 22 Cast used for?
Alloy 22 Cast 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 Cast?
Alloy 22 Cast has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 69% of nickel alloy grades. Strength varies by condition: see the 6 listed tempers.
Is Alloy 22 Cast easy to machine?
Not especially — machinability is rated not recommended (14/100, worse than 81% 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 Cast be welded?
Yes — weldability is rated very good (78/100). 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 Cast?
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 Cast 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 Cast?
Alloy 22 Cast is rated for continuous use to about 650°C (1,202 °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.