Nickel Alloy N07773-SA (Solution annealed)
Heat-treated state
UNS N07773
Pick for forming, machining of complex features or welding before the final ageing cycle.
Values for the SA condition
Other N07773 tempers and conditions
N07773 is listed in 5 conditions; see the grade overview at N07773.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SAThis page Solution annealed | Pick for forming, machining of complex features or welding before the final ageing cycle. | 450 | 900 | 45 | 200 HB | — |
As-welded deposit | Property level of an unaged joint; re-solution + age is normally required to restore parent strength. | 450 | 850 | 25 | 210 HB | 1.4 % IACS |
Hot worked / as-forged, unaged | Mill condition for forging stock and oversize bar that will be re-heat-treated by the part maker. | 620 | 1,000 | 30 | 25 HRC | 1.4 % IACS |
STADefault Solution treated and aged | Standard supply and service condition: maximum room- and elevated-temperature strength and creep resistance. | 1,030 | 1,275 | 16 | 38 HRC | — |
Cold drawn | For close-tolerance bar, fastener wire and springs where cold work supplements the ageing response. | 1,100 | 1,300 | 12 | 40 HRC | 1.4 % IACS |
What is N07773-SA?
N07773-SA is N07773 heat treated to SA — pick for forming, machining of complex features or welding before the final ageing cycle. N07773-SA has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 200 GPa (29 Msi). N07773-SA has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 63% of nickel alloy grades. It melts at 1,260°C (2,300 °F). STA is the default condition FabDigit quotes; SA is available on request or by drawing note.
N07773-SA properties
Typical room-temperature values for N07773-SA; 13 are specific to this condition. Other listed values are N07773 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
N07773-SA has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 63% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Mechanical15
N07773-SA has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 200 GPa (29 Msi).
Thermal5
N07773-SA is rated for continuous service to 600°C (1,112 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), better than 57% of nickel alloy grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
N07773-SA conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 51% of nickel alloy grades.
Sustainability4
Producing a kilogram of N07773-SA takes about 150 MJ of energy and emits 12 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
N07773-SA's machinability is poor (22/100, better than 64% of nickel alloy grades); weldability good (60/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with N07773-SA
Is N07773 easy to machine?
Machine in the solution-annealed state where possible; aged material needs rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant to avoid work hardening and notching.
Can N07773 be welded?
GTAW/EBW with matching or Ni-Cr filler on solution-annealed material; keep heat input low and follow with a full re-solution + double age to avoid strain-age cracking and restore joint strength.
Can N07773 be formed, bent or molded?
Cold form only in the annealed condition with high tooling loads and frequent intermediate anneals; hot forge in a narrow window (~1050–1150 °C) with controlled finish temperature to keep grain size.
What surface finishes work on N07773?
Not anodizable — pickle/passivate or electropolish after heat treatment, shot peen for fatigue life, and use aluminide or MCrAlY coatings for long hot-gas exposure.
N07773 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.
| Element | Spec limit (wt %) |
|---|---|
| Crprincipal oxidation/corrosion-resisting addition, class range roughly 14–20 % — verify against the UNS/AMS registration for this grade | — |
| Fesignificant intentional addition (Ni-Cr-Fe family); exact range not confirmed for N07773 | — |
| Tiγ′ former; exact range not confirmed | — |
| Alγ′ former; exact range not confirmed | — |
| Nbpossible γ″/carbide former; presence and range not confirmed | — |
| Mopossible solid-solution strengthener; presence and range not confirmed | — |
| Clow, typically ≤0.10 % in this class | — |
| Sresidual, typically ≤0.015 % | — |
| Presidual, typically ≤0.015 % | — |
| Nimatrix; γ′/γ″ precipitation-hardening Ni-Cr-Fe system | balance |
N07773-SA — frequently asked
What is N07773-SA used for?
N07773-SA is typically used for gas turbine hot-section hardware, aerospace fasteners and high-temperature structural components. In short: 718-class aged strength; limited-availability UNS grade; 650 °C creep service.
What is the yield strength of N07773-SA?
N07773-SA has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 66% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is N07773-SA easy to machine?
Not especially — machinability is rated poor (22/100, better than 64% of nickel alloy grades). Machine in the solution-annealed state where possible; aged material needs rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant to avoid work hardening and notching.
Can N07773-SA be welded?
Yes — weldability is rated good (60/100). GTAW/EBW with matching or Ni-Cr filler on solution-annealed material; keep heat input low and follow with a full re-solution + double age to avoid strain-age cracking and restore joint strength.
What surface finishes work on N07773-SA?
Not anodizable — pickle/passivate or electropolish after heat treatment, shot peen for fatigue life, and use aluminide or MCrAlY coatings for long hot-gas exposure.
Can N07773-SA be formed, bent or molded?
Cold form only in the annealed condition with high tooling loads and frequent intermediate anneals; hot forge in a narrow window (~1050–1150 °C) with controlled finish temperature to keep grain size.
What is the maximum service temperature of N07773-SA?
N07773-SA is rated for continuous use to about 600°C (1,112 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between N07773-STA and N07773-SA?
STA is the default condition — standard supply and service condition: maximum room- and elevated-temperature strength and creep resistance. SA: pick for forming, machining of complex features or welding before the final ageing cycle. Yield strength is 1,030 MPa in STA versus 450 MPa in SA.
Sources
- Metals & Alloys in the Unified Numbering System (UNS), N07xxx nickel alloys — SAE International / ASTM (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys (heat-resistant nickel alloys) — ASM International (1990)
- Superalloys: A Technical Guide, 2nd ed. — ASM International (2002)
- ASTM B637 — Precipitation-Hardening Nickel Alloy Bars, Forgings and Forging Stock for High-Temperature Service — ASTM (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.