Nickel Alloy ERNiFeCr-1 STA-954
Precip hard
UNS N07718 · ISO S Ni 7718
Standard aerospace weldment condition when fine grain size and best low-cycle fatigue/notch ductility are required.
Values for the STA-954 condition
Other ERNiFeCr-1 tempers and conditions
ERNiFeCr-1 is listed in 5 conditions; see the grade overview at ERNiFeCr-1.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed weld/deposit | Intermediate softened state used before further machining, straightening or when the assembly must be cold-formed after welding. | 450 | 900 | 42 | 200 HB | — |
AWDefault As-welded deposit | Default reported condition for the deposit: use when the joint sees only moderate stress/temperature or when PWHT is impossible. | 540 | 860 | 28 | 24 HRC | — |
720 °C/8 h + FC + 620 °C/8 h (double age only) | Pick when the base metal is already solution treated and only the weld needs strengthening without re-solutioning the part. | 930 | 1,150 | 16 | 38 HRC | — |
STA | Choose when creep/stress-rupture life above 600 °C and Laves-phase dissolution matter more than room-temperature strength. | 1,030 | 1,240 | 14 | 40 HRC | — |
STA-954This page STA | Standard aerospace weldment condition when fine grain size and best low-cycle fatigue/notch ductility are required. | 1,080 | 1,280 | 15 | 42 HRC | — |
What is ERNiFeCr-1 STA-954?
ERNiFeCr-1 STA-954 is ERNiFeCr-1 in the STA-954 condition — standard aerospace weldment condition when fine grain size and best low-cycle fatigue/notch ductility are required. ERNiFeCr-1 STA-954 has a yield strength of 1,080 MPa (157 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 98% of nickel alloy grades. Elongation at break is 15% and the elastic modulus is 204 GPa (29.6 Msi). ERNiFeCr-1 STA-954 has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,260°C (2,300 °F). AW is the default condition FabDigit quotes; STA-954 is available on request or by drawing note.
Advantages
- High strength — 1,080 MPa (157 ksi), better than 98% of nickel alloy grades
Limitations
- Limited ductility — 15%, worse than 81% of nickel alloy grades
ERNiFeCr-1 STA-954 properties
Typical room-temperature values for ERNiFeCr-1 STA-954; 14 are specific to this condition. Other listed values are ERNiFeCr-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ERNiFeCr-1 STA-954 has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Mechanical15
ERNiFeCr-1 STA-954 has a yield strength of 1,080 MPa (157 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 98% of nickel alloy grades. Elongation at break is 15% and the elastic modulus is 204 GPa (29.6 Msi).
Thermal6
ERNiFeCr-1 STA-954 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 11.4 W/m·K (6.59 BTU/hr·ft·°F), better than 53% of nickel alloy grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
ERNiFeCr-1 STA-954 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 ERNiFeCr-1 STA-954 takes about 135 MJ of energy and emits 13 kg of CO₂ — less than 84% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability7
ERNiFeCr-1 STA-954's machinability is poor (18/100, worse than 61% of nickel alloy grades); weldability very good (70/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ERNiFeCr-1 STA-954
Is ERNiFeCr-1 easy to machine?
Machine in the solution-annealed state where possible; aged deposits at 40+ HRC need rigid setups, ceramic or coated carbide, low speed/heavy feed and flood coolant to avoid work hardening.
Can ERNiFeCr-1 be welded?
GTAW/GMAW/laser with 100% Ar (add 2–5% He for penetration), low heat input, interpass <150 °C to limit Laves-phase segregation and HAZ liquation cracking; keep the filler clean and dry.
Can ERNiFeCr-1 be formed, bent or molded?
Wire drawing and cold bending are done in the annealed state; cold work rapidly raises strength, so intermediate anneals are required for large deformation.
What surface finishes work on ERNiFeCr-1?
Pickle or bead-blast the weld to remove Cr/Ti oxide before aging or inspection; not anodizable — electropolish or passivate for cleanliness, and consider aluminide/thermal-barrier coatings for hot-section service.
ERNiFeCr-1 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 |
|---|---|---|
| NiNi+Co | 50 – 55 | 52.5 |
| Cr | 17 – 21 | 19 |
| NbNb+Ta | 4.75 – 5.5 | 5.1 |
| Mo | 2.8 – 3.3 | 3.05 |
| Ti | 0.75 – 1.15 | 0.95 |
| Al | 0.2 – 0.8 | 0.5 |
| Co | ≤ 1 | 0.2 |
| C | ≤ 0.08 | 0.04 |
| Mn | ≤ 0.35 | 0.1 |
| Si | ≤ 0.35 | 0.1 |
| Cu | ≤ 0.3 | 0.05 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.02 | 0.01 |
| B | ≤ 0.01 | 0 |
| Febalance, typically 17–20 % | balance | — |
ERNiFeCr-1 STA-954 — frequently asked
What is ERNiFeCr-1 STA-954 used for?
ERNiFeCr-1 STA-954 is typically used for gas turbine component repair, aerospace superalloy fabrication and 718 fastener/hardware welding. In short: alloy 718-matched filler; age-hardenable weld deposit; hot-section repair standard.
What is the yield strength of ERNiFeCr-1 STA-954?
ERNiFeCr-1 STA-954 has a typical yield strength of 1,080 MPa (157 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 98% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is ERNiFeCr-1 STA-954 easy to machine?
Not especially — machinability is rated poor (18/100, worse than 61% of nickel alloy grades). Machine in the solution-annealed state where possible; aged deposits at 40+ HRC need rigid setups, ceramic or coated carbide, low speed/heavy feed and flood coolant to avoid work hardening.
Can ERNiFeCr-1 STA-954 be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/laser with 100% Ar (add 2–5% He for penetration), low heat input, interpass <150 °C to limit Laves-phase segregation and HAZ liquation cracking; keep the filler clean and dry.
What surface finishes work on ERNiFeCr-1 STA-954?
Pickle or bead-blast the weld to remove Cr/Ti oxide before aging or inspection; not anodizable — electropolish or passivate for cleanliness, and consider aluminide/thermal-barrier coatings for hot-section service.
Can ERNiFeCr-1 STA-954 be formed, bent or molded?
Wire drawing and cold bending are done in the annealed state; cold work rapidly raises strength, so intermediate anneals are required for large deformation.
What is the maximum service temperature of ERNiFeCr-1 STA-954?
ERNiFeCr-1 STA-954 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 ERNiFeCr-1-AW and ERNiFeCr-1 STA-954?
AW is the default condition — default reported condition for the deposit: use when the joint sees only moderate stress/temperature or when PWHT is impossible. STA-954: standard aerospace weldment condition when fine grain size and best low-cycle fatigue/notch ductility are required. Yield strength is 540 MPa in AW versus 1,080 MPa in STA-954.
Sources
- AWS A5.14/A5.14M — Nickel and Nickel-Alloy Bare Welding Electrodes and Rods — AWS (2018)
- AMS 5832 — Nickel Alloy Welding Wire 52.5Ni-19Cr-3.0Mo-5.1Cb-0.90Ti-0.50Al-18Fe — SAE International (2021)
- AMS 5662 / AMS 5664 — Alloy 718 heat treatment and properties — SAE International (2016)
- INCONEL alloy 718 technical bulletin — Special Metals Corporation (2007)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
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.