Nickel Alloy Inconel 752
UNS N07752
Inconel 752 (UNS N07752; also supplied against N07750) is an age-hardenable Ni-Cr-Fe superalloy related to X-750/751 with an adjusted Al/Ti ratio for higher elevated-temperature strength in turbine and valve service.
Reference datasheet — Inconel 752 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the STA condition
Inconel 752 tempers and conditions
Inconel 752 is supplied in 6 conditions, soft to hard. STA is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition — pick it for forming, deep drawing, machining or welding before final ageing. | 380 | 840 | 42 | 190 HB | — |
Equalized 885 °C/24 h + aged 704 °C/20 h | Classic exhaust-valve / valve-seat treatment: best combination of hot hardness, relaxation resistance and ductility for 650–815 °C service. | 730 | 1,120 | 25 | 33 HRC | 1.4 % IACS |
Hot rolled/forged then aged 704 °C/20 h | Economical aged bar/forging condition when full solution treatment is not required and moderate strength suffices. | 760 | 1,140 | 20 | 34 HRC | 1.4 % IACS |
STADefault Solution treated and aged | Standard high-strength condition for turbine bolting, discs and heavily loaded parts up to ~870 °C. | 820 | 1,210 | 22 | 36 HRC | — |
Cold drawn then aged 704 °C/20 h | Cold-drawn bar/wire with ageing for maximum room-temperature strength in fasteners and small machined parts. | 1,000 | 1,310 | 15 | 39 HRC | 1.4 % IACS |
Spring hard | Wire/strip condition for high-temperature springs and diaphragms where relaxation resistance to ~650 °C is needed. | 1,170 | 1,450 | 8 | 43 HRC | 1.4 % IACS |
What is Inconel 752?
Inconel 752 (UNS N07752; also supplied against N07750) is an age-hardenable Ni-Cr-Fe superalloy related to X-750/751 with an adjusted Al/Ti ratio for higher elevated-temperature strength in turbine and valve service. It is used for hot valve and turbine hardware and is available as bar, wire, forgings and strip in annealed, equalised-and-aged, hot-rolled, cold-drawn and spring conditions; aged material runs about 820 MPa yield, 1210 MPa tensile, 22 % elongation and 36 HRC, with a maximum service temperature of 870 °C. Machinability 15, formability 25 and weldability 30 make it demanding to process, and it must be welded and formed annealed then re-aged. X-750 is the more widely stocked alternative. Inconel 752 has a density of 8.28 g/cm³ (0.299 lb/in³), lighter than 55% of nickel alloy grades. It melts at 1,393°C (2,539 °F). Inconel 752 has a yield strength of 820 MPa (119 ksi) and a tensile strength of 1,210 MPa (175 ksi) — stronger than 87% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 214 GPa (31 Msi).
What is Inconel 752 used for?
- turbine blades
- exhaust valves
- high-temperature springs
- aerospace fasteners
Advantages
- High strength — 820 MPa (119 ksi), better than 87% of nickel alloy grades
Limitations
- Difficult to weld — 30/100, worse than 78% of nickel alloy grades
Inconel 752 properties
Typical room-temperature values for Inconel 752-STA; bars are the position among nickel alloy grades.
Physical3
Inconel 752 has a density of 8.28 g/cm³ (0.299 lb/in³), lighter than 55% of nickel alloy grades. It melts at 1,393°C (2,539 °F).
Mechanical15
Inconel 752 has a yield strength of 820 MPa (119 ksi) and a tensile strength of 1,210 MPa (175 ksi) — stronger than 87% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 214 GPa (31 Msi).
Thermal6
Inconel 752 is rated for continuous service to 870°C (1,598 °F). It conducts heat at 12 W/m·K (6.93 BTU/hr·ft·°F), better than 65% of nickel alloy grades. Thermal expansion is 12.6 µm/m·K (7 µin/in·°F).
Electrical3
Inconel 752 conducts electricity at 1.4 % IACS, worse than 65% 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 Inconel 752 takes about 145 MJ of energy and emits 11.5 kg of CO₂ — less than 77% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Inconel 752's machinability is poor (15/100, worse than 76% of nickel alloy grades); weldability poor (30/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Inconel 752 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Inconel 752
Is Inconel 752 easy to machine?
Machine in the annealed condition where possible; aged material needs rigid setups, positive-rake carbide or ceramic, 15–30 m/min, heavy flood coolant and constant feed to avoid work hardening.
Can Inconel 752 be welded?
GTAW with Inconel 718/A-286 or matching filler on solution-annealed base metal only; re-solution and re-age after welding to avoid strain-age cracking, and keep heat input low.
Can Inconel 752 be formed, bent or molded?
Cold form only in the annealed state with high forming loads and frequent intermediate anneals; hot work at 1010–1175 °C and finish above 950 °C.
Inconel 752 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 | 14 – 17 | 15.5 |
| Fe | 5 – 9 | 7 |
| Tireduced vs X-750 to raise Al/Ti ratio; low confidence | 1.4 – 2.2 | 1.8 |
| Alraised vs X-750/751 for γ′ stability; low confidence | 1.6 – 2.6 | 2.1 |
| NbNb+Ta | 0.7 – 1.2 | 0.9 |
| Mn | ≤ 1 | 0.3 |
| Si | ≤ 0.5 | 0.2 |
| C | ≤ 0.08 | 0.04 |
| Cu | ≤ 0.5 | 0.05 |
| Co | ≤ 1 | 0.3 |
| S | ≤ 0.01 | 0 |
| Niplus cobalt, balance | ≥ 70 (balance) |
What surface finishes work on Inconel 752?
Not anodizable — pickle/grit blast to remove tenacious oxide, then electropolish, passivate or apply aluminide/Cr plating for hot-gas or wear surfaces.
Surface treatments FabDigit runs on nickel alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Inconel 752 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N07752
- Similar grades
- N07750
How much does Inconel 752 cost?
Inconel 752 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Inconel 752 — frequently asked
What is Inconel 752 used for?
Inconel 752 is typically used for turbine blades, exhaust valves, high-temperature springs and aerospace fasteners. In short: exhaust valve superalloy; hotter X-750 variant; 870 °C service capability.
What is the yield strength of Inconel 752?
Inconel 752 has a typical yield strength of 820 MPa (119 ksi) and a tensile strength of 1,210 MPa (175 ksi) — stronger than 87% of nickel alloy grades. Strength varies by condition: see the 6 listed tempers.
Is Inconel 752 easy to machine?
Not especially — machinability is rated poor (15/100, worse than 76% of nickel alloy grades). Machine in the annealed condition where possible; aged material needs rigid setups, positive-rake carbide or ceramic, 15–30 m/min, heavy flood coolant and constant feed to avoid work hardening.
Can Inconel 752 be welded?
Not readily — weldability is rated poor (30/100). GTAW with Inconel 718/A-286 or matching filler on solution-annealed base metal only; re-solution and re-age after welding to avoid strain-age cracking, and keep heat input low.
What surface finishes work on Inconel 752?
Not anodizable — pickle/grit blast to remove tenacious oxide, then electropolish, passivate or apply aluminide/Cr plating for hot-gas or wear surfaces.
Can Inconel 752 be formed, bent or molded?
Cold form only in the annealed state with high forming loads and frequent intermediate anneals; hot work at 1010–1175 °C and finish above 950 °C.
What is the maximum service temperature of Inconel 752?
Inconel 752 is rated for continuous use to about 870°C (1,598 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Inconel 752-STA and Inconel 752-ANN?
STA is the default condition — standard high-strength condition for turbine bolting, discs and heavily loaded parts up to ~870 °C. ANN: softest condition — pick it for forming, deep drawing, machining or welding before final ageing. Yield strength is 820 MPa in STA versus 380 MPa in ANN.
How much does Inconel 752 cost?
Inconel 752 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Ni-Cr-Fe age-hardenable alloys) — ASM International (1990)
- ASTM B637 — Precipitation-Hardening Nickel Alloy Bars, Forgings and Forging Stock for High-Temperature Service — ASTM (2018)
- UNS N07752 / N07750 alloy designations, Metals & Alloys in the Unified Numbering System — SAE/ASTM (2017)
- INCONEL alloy X-750 and alloy 751 technical bulletins (property analogues) — Special Metals Corporation (2004)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (Ni-base precipitation-hardened alloys) — ASM International (1993)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.