Nickel 205-ANN (Annealed)
Heat-treated state · default condition
UNS N02205
Standard stocked condition for deep drawing, stamping and lead-wire forming of electron-tube components.
Values for the ANN condition
Other Nickel 205 tempers and conditions
Nickel 205 is listed in 4 conditions; see the grade overview at Nickel 205.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefaultThis page Annealed | Standard stocked condition for deep drawing, stamping and lead-wire forming of electron-tube components. | 145 | 440 | 45 | 95 HB | — |
Hot rolled | Pick for larger-section bar and rod where the mill supplies as-hot-worked stock for subsequent machining. | 200 | 500 | 40 | 110 HB | 19 % IACS |
Cold drawn | Pick when straightness, close diameter tolerance and higher yield strength are needed in lead wire, side rods and pins. | 520 | 620 | 15 | 175 HB | 18.5 % IACS |
Hardened | Pick for stiff flat springs, grid side rods and stamped parts that must hold shape without further heat treatment. | 690 | 760 | 5 | 20 HRC | 18 % IACS |
What is Nickel 205-ANN?
Nickel 205-ANN is Nickel 205 heat treated to ANN — standard stocked condition for deep drawing, stamping and lead-wire forming of electron-tube components. Nickel 205-ANN has a yield strength of 145 MPa (21 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 98% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 207 GPa (30 Msi). Nickel 205-ANN has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 88% of nickel alloy grades. It melts at 1,435°C (2,615 °F).
Advantages
- Forms and bends easily — 92/100, better than 99% of nickel alloy grades
- High electrical conductivity — 19 % IACS, better than 98% of nickel alloy grades
- Conducts heat well — 70 W/m·K (40.4 BTU/hr·ft·°F), better than 97% of nickel alloy grades
- Polishes to a fine finish — 80/100, better than 97% of nickel alloy grades
- Easy to machine — 32/100, better than 95% of nickel alloy grades
Limitations
- Low strength — 145 MPa (21 ksi), worse than 98% of nickel alloy grades
- Limited service temperature — 315°C (599 °F), worse than 98% of nickel alloy grades
Nickel 205-ANN properties
Typical room-temperature values for Nickel 205-ANN; 10 are specific to this condition. Other listed values are Nickel 205 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Nickel 205-ANN has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 88% of nickel alloy grades. It melts at 1,435°C (2,615 °F).
Mechanical14
Nickel 205-ANN has a yield strength of 145 MPa (21 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 98% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
Nickel 205-ANN is rated for continuous service to 315°C (599 °F). It conducts heat at 70 W/m·K (40.4 BTU/hr·ft·°F), better than 97% of nickel alloy grades. Thermal expansion is 13.3 µm/m·K (7.39 µin/in·°F).
Electrical3
Nickel 205-ANN conducts electricity at 19 % IACS, better than 98% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 77% of nickel alloy grades.
Sustainability4
Producing a kilogram of Nickel 205-ANN takes about 165 MJ of energy and emits 13 kg of CO₂ — more than 54% of nickel alloy grades. Typical recycled content is 20%.
Manufacturability8
Nickel 205-ANN's machinability is poor (32/100, better than 95% of nickel alloy grades); weldability very good (80/100); formability excellent (92/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Nickel 205-ANN
Is Nickel 205 easy to machine?
Gummy and work-hardening — use positive-rake sharp carbide, heavy feed, low-to-moderate speed (25–40 m/min), rigid setups and sulfur-free (chlorinated or synthetic) coolant to avoid contaminating vacuum parts.
Can Nickel 205 be welded?
Readily GTAW/resistance/laser welded and spot welded with Nickel 61 (ERNi-1) filler or autogenously; keep joints free of sulfur, lead and grease, and avoid oxidizing flames in gas welding.
Can Nickel 205 be formed, bent or molded?
Excellent cold formability in the annealed temper — deep draws, spins and multi-slide stamps well; anneal at 700–870 °C between severe draws and expect ~25–30 % higher press loads than for mild steel.
What surface finishes work on Nickel 205?
Not anodizable; parts are typically hydrogen-fired bright, electroplated (Cu, Ag, Au) for brazing/conductivity, or carbon-blackened/oxidized for high thermal emissivity in tube anodes.
Nickel 205 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 | ≤ 0.15 | 0.08 |
| Mn | ≤ 0.35 | 0.2 |
| Fe | ≤ 0.2 | 0.1 |
| Skept very low for hydrogen firing | ≤ 0.01 | 0 |
| Si | ≤ 0.15 | 0.05 |
| Cu | ≤ 0.15 | 0.05 |
| Tideoxidizer / grain control | 0.01 – 0.05 | 0.03 |
| Mgdistinguishes 205 from Nickel 200 | 0.01 – 0.08 | 0.04 |
| Ninickel plus cobalt | ≥ 99 (balance) | — |
Nickel 205-ANN — frequently asked
What is Nickel 205-ANN used for?
Nickel 205-ANN is typically used for electron tube components, lead wires, cathodes and electronic parts. In short: sulfur-free tube-grade nickel; excellent deep-draw formability; vacuum-clean lead wire stock.
What is the yield strength of Nickel 205-ANN?
Nickel 205-ANN has a typical yield strength of 145 MPa (21 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 98% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Nickel 205-ANN easy to machine?
Not especially — machinability is rated poor (32/100, better than 95% of nickel alloy grades). Gummy and work-hardening — use positive-rake sharp carbide, heavy feed, low-to-moderate speed (25–40 m/min), rigid setups and sulfur-free (chlorinated or synthetic) coolant to avoid contaminating vacuum parts.
Can Nickel 205-ANN be welded?
Yes — weldability is rated very good (80/100). Readily GTAW/resistance/laser welded and spot welded with Nickel 61 (ERNi-1) filler or autogenously; keep joints free of sulfur, lead and grease, and avoid oxidizing flames in gas welding.
What surface finishes work on Nickel 205-ANN?
Not anodizable; parts are typically hydrogen-fired bright, electroplated (Cu, Ag, Au) for brazing/conductivity, or carbon-blackened/oxidized for high thermal emissivity in tube anodes.
Can Nickel 205-ANN be formed, bent or molded?
Excellent cold formability in the annealed temper — deep draws, spins and multi-slide stamps well; anneal at 700–870 °C between severe draws and expect ~25–30 % higher press loads than for mild steel.
What is the maximum service temperature of Nickel 205-ANN?
Nickel 205-ANN is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Nickel 205-ANN and Nickel 205-H?
ANN is the default condition — standard stocked condition for deep drawing, stamping and lead-wire forming of electron-tube components. H: pick for stiff flat springs, grid side rods and stamped parts that must hold shape without further heat treatment. Yield strength is 145 MPa in ANN versus 690 MPa in H.
Sources
- Nickel 205 alloy data sheet — Special Metals Corporation (2020)
- ASTM B160 / B161 / B162 — Nickel Rod, Bar, Pipe, Tube and Plate, Sheet, Strip — ASTM International (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.