Nickel Alloy Inconel 693 Aged
Heat-treated state
UNS N06693
Aged = annealed + Aged
Use when higher strength is required from the Al-bearing chemistry; aging also occurs in service around 650–800 °C.
Values for the Aged condition
Other Inconel 693 tempers and conditions
Inconel 693 is listed in 4 conditions; see the grade overview at Inconel 693.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Finished | Choose for large-diameter bar, forging stock and flange/valve bodies where surface finish is secondary. | 380 | 780 | 45 | 190 HB | 1.4 % IACS |
ANNDefault Annealed | Standard stocked condition for all product forms in metal-dusting and high-temperature oxidation service. | 400 | 790 | 45 | 195 HB | — |
AgedThis page Annealed + Aged | Use when higher strength is required from the Al-bearing chemistry; aging also occurs in service around 650–800 °C. | 600 | 950 | 25 | 30 HRC | 1.5 % IACS |
Cold drawn | Pick for higher strength, tight tolerance and better surface on small bar and instrument tubing. | 700 | 950 | 25 | 27 HRC | 1.4 % IACS |
What is Inconel 693 Aged?
Inconel 693 Aged is Inconel 693 heat treated to Aged — use when higher strength is required from the Al-bearing chemistry; aging also occurs in service around 650–800 °C. Inconel 693 Aged has a yield strength of 600 MPa (87 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 81% of nickel alloy grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi). Inconel 693 Aged has a density of 7.63 g/cm³ (0.276 lb/in³), lighter than 98% of nickel alloy grades. It melts at 1,343°C (2,449 °F). ANN is the default condition FabDigit quotes; Aged is available on request or by drawing note.
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 88% of nickel alloy grades
- High strength — 600 MPa (87 ksi), better than 81% of nickel alloy grades
Inconel 693 Aged properties
Typical room-temperature values for Inconel 693 Aged; 22 are specific to this condition. Other listed values are Inconel 693 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Inconel 693 Aged has a density of 7.63 g/cm³ (0.276 lb/in³), lighter than 98% of nickel alloy grades. It melts at 1,343°C (2,449 °F).
Mechanical13
Inconel 693 Aged has a yield strength of 600 MPa (87 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 81% of nickel alloy grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
Inconel 693 Aged is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 60% of nickel alloy grades. Thermal expansion is 12.6 µm/m·K (7 µin/in·°F).
Electrical3
Inconel 693 Aged conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 67% of nickel alloy grades.
Sustainability4
Producing a kilogram of Inconel 693 Aged takes about 160 MJ of energy and emits 13 kg of CO₂ — less than 53% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Inconel 693 Aged's machinability is not recommended (13/100, worse than 82% of nickel alloy grades); weldability fair (45/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Inconel 693 Aged
Is Inconel 693 easy to machine?
Machine like alloy 601/625: rigid setup, positive-rake carbide or ceramic, low speed with heavy positive feed, flood coolant, and never dwell — the alloy work-hardens rapidly.
Can Inconel 693 be welded?
GTAW/GMAW with matching Filler Metal 693; keep heat input and interpass temperature low, clean Al-oxide film before welding, and avoid high-restraint joints because Al+Nb raise hot-cracking risk.
Can Inconel 693 be formed, bent or molded?
Hot work 950–1200 °C then anneal; cold forming is possible but requires ~50% more force than 300-series stainless with intermediate anneals at ~1080 °C.
What surface finishes work on Inconel 693?
Pickle/passivate or grit-blast + descale after hot work; no anodizing — the in-service alumina/chromia scale is the protective layer, so avoid Cu- or S-bearing marking compounds.
Inconel 693 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 | 27 – 31 | 29 |
| Fe | 2.5 – 6 | 4 |
| Alforms protective alumina-rich scale | 2.5 – 4 | 3.2 |
| Nb | 0.5 – 2.5 | 1 |
| Ti | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.3 |
| Si | ≤ 0.5 | 0.2 |
| Cu | ≤ 0.5 | 0.05 |
| C | ≤ 0.15 | 0.04 |
| S | ≤ 0.01 | 0 |
| B | ≤ 0.01 | 0 |
| Zr | ≤ 0.1 | 0.03 |
| Nibalance, plus Co | ≥ 56 (balance) | — |
Inconel 693 Aged — frequently asked
What is Inconel 693 Aged used for?
Inconel 693 Aged is typically used for waste incinerator components, reformer tubes and high-temperature furnace fixtures. In short: metal-dusting resistant grade; 1100 °C oxidation service; alumina-forming Ni-Cr-Al.
What is the yield strength of Inconel 693 Aged?
Inconel 693 Aged has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 81% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Inconel 693 Aged easy to machine?
Not especially — machinability is rated not recommended (13/100, worse than 82% of nickel alloy grades). Machine like alloy 601/625: rigid setup, positive-rake carbide or ceramic, low speed with heavy positive feed, flood coolant, and never dwell — the alloy work-hardens rapidly.
Can Inconel 693 Aged be welded?
With care — weldability is rated fair (45/100). GTAW/GMAW with matching Filler Metal 693; keep heat input and interpass temperature low, clean Al-oxide film before welding, and avoid high-restraint joints because Al+Nb raise hot-cracking risk.
What surface finishes work on Inconel 693 Aged?
Pickle/passivate or grit-blast + descale after hot work; no anodizing — the in-service alumina/chromia scale is the protective layer, so avoid Cu- or S-bearing marking compounds.
Can Inconel 693 Aged be formed, bent or molded?
Hot work 950–1200 °C then anneal; cold forming is possible but requires ~50% more force than 300-series stainless with intermediate anneals at ~1080 °C.
What is the maximum service temperature of Inconel 693 Aged?
Inconel 693 Aged is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Inconel 693-ANN and Inconel 693-CD?
ANN is the default condition — standard stocked condition for all product forms in metal-dusting and high-temperature oxidation service. CD: pick for higher strength, tight tolerance and better surface on small bar and instrument tubing. Yield strength is 400 MPa in ANN versus 700 MPa in CD.
Sources
- INCONEL alloy 693 technical bulletin — Special Metals Corporation (2005)
- ASTM B168 / B166 / B564 (UNS N06693 nickel-chromium products) — ASTM International (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- UNS N06693 alloy data listing — SAE/ASTM Unified Numbering System (2020)
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.