Nickel Alloy N30C-SA (Solution annealed)
Heat-treated state · default condition
ASTM A494 N30C
Standard supply condition for corrosion service: carbides dissolved, maximum ductility and intergranular corrosion resistance.
Values for the SA condition
Other N30C tempers and conditions
N30C is listed in 3 conditions; see the grade overview at N30C.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefaultThis page Solution annealed | Standard supply condition for corrosion service: carbides dissolved, maximum ductility and intergranular corrosion resistance. | 300 | 550 | 15 | 13 HRC | 1.4 % IACS |
hot isostatically pressed then solution annealed | Choose for pressure-retaining or fatigue-loaded castings where shrinkage porosity must be closed. | 310 | 580 | 22 | 13 HRC | 1.4 % IACS |
As fabricated | Use only for non-critical or low-corrosivity parts; interdendritic carbides lower ductility and intergranular corrosion resistance. | 320 | 500 | 8 | 17 HRC | 1.4 % IACS |
What is N30C-SA?
N30C-SA is N30C heat treated to SA — standard supply condition for corrosion service: carbides dissolved, maximum ductility and intergranular corrosion resistance. N30C-SA has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 78% of nickel alloy grades. Elongation at break is 15% and the elastic modulus is 210 GPa (30.5 Msi). N30C-SA has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 85% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Advantages
- Good corrosion resistance — 88/100, better than 81% of nickel alloy grades
Limitations
- Limited ductility — 15%, worse than 81% of nickel alloy grades
- Low strength — 300 MPa (43.5 ksi), worse than 78% of nickel alloy grades
N30C-SA properties
Typical room-temperature values for N30C-SA; 23 are specific to this condition. Other listed values are N30C reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
N30C-SA has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 85% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Mechanical17
N30C-SA has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 78% of nickel alloy grades. Elongation at break is 15% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
N30C-SA is rated for continuous service to 760°C (1,400 °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 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
N30C-SA conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 81% of nickel alloy grades.
Sustainability4
Producing a kilogram of N30C-SA takes about 150 MJ of energy and emits 12 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability7
N30C-SA's machinability is poor (20/100, better than 53% of nickel alloy grades); weldability good (65/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with N30C-SA
Is N30C easy to machine?
Gummy, strongly work-hardening: rigid setup, sharp positive-rake carbide, low speed (15–25 m/min), heavy feed, flood coolant, never dwell.
Can N30C be welded?
GTAW/SMAW with matching Ni-Mo-Cr filler, low heat input, interpass <120 °C; solution anneal after major weld repair to restore corrosion resistance.
Can N30C be formed, bent or molded?
Sand or investment cast with generous risering — long freezing range gives shrinkage porosity; HIP for pressure-tight parts; not a cold-formable product.
What surface finishes work on N30C?
Grit-blast and pickle (HNO3-HF) or full solution anneal to remove casting scale; takes a good mechanical/electropolish; no anodizing (non-valve metal).
N30C 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 |
|---|---|---|
| Moprimary reducing-acid / molten-salt resistance | 15 – 18 | 16.5 |
| Croxidation resistance without excessive salt attack | 6 – 8 | 7 |
| Fe | ≤ 5 | 4 |
| Ccast grades run higher C than wrought N10003 | 0.04 – 0.1 | 0.07 |
| Mn | ≤ 1 | 0.6 |
| Si | ≤ 1 | 0.6 |
| W | ≤ 0.5 | 0.2 |
| Corestricted for nuclear service | ≤ 0.2 | 0.1 |
| Cu | ≤ 0.35 | 0.1 |
| Al | ≤ 0.5 | 0.2 |
| Ti | ≤ 0.5 | 0.2 |
| Brestricted for nuclear service | ≤ 0.01 | 0 |
| P | ≤ 0.02 | — |
| S | ≤ 0.02 | — |
| Nibalance, approx. 68–72 % | balance | — |
N30C-SA — frequently asked
What is N30C-SA used for?
N30C-SA is typically used for molten salt handling components, high-temperature chemical fittings and corrosion-resistant valve bodies. In short: molten-salt service alloy; cast Ni-Mo-Cr chemistry; 760 °C maximum service.
What is the yield strength of N30C-SA?
N30C-SA has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 78% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is N30C-SA easy to machine?
Not especially — machinability is rated poor (20/100, better than 53% of nickel alloy grades). Gummy, strongly work-hardening: rigid setup, sharp positive-rake carbide, low speed (15–25 m/min), heavy feed, flood coolant, never dwell.
Can N30C-SA be welded?
Yes — weldability is rated good (65/100). GTAW/SMAW with matching Ni-Mo-Cr filler, low heat input, interpass <120 °C; solution anneal after major weld repair to restore corrosion resistance.
What surface finishes work on N30C-SA?
Grit-blast and pickle (HNO3-HF) or full solution anneal to remove casting scale; takes a good mechanical/electropolish; no anodizing (non-valve metal).
Can N30C-SA be formed, bent or molded?
Sand or investment cast with generous risering — long freezing range gives shrinkage porosity; HIP for pressure-tight parts; not a cold-formable product.
What is the maximum service temperature of N30C-SA?
N30C-SA is rated for continuous use to about 760°C (1,400 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between N30C-SA and N30C-F?
SA is the default condition — standard supply condition for corrosion service: carbides dissolved, maximum ductility and intergranular corrosion resistance. F: use only for non-critical or low-corrosivity parts; interdendritic carbides lower ductility and intergranular corrosion resistance. Yield strength is 300 MPa in SA versus 320 MPa in F.
Sources
- ASTM A494/A494M — Castings, Nickel and Nickel Alloy — ASTM International (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- HASTELLOY N alloy principal features and properties — Haynes International (2020)
- Molten-Salt Reactor Program: INOR-8 / Hastelloy N materials reports — Oak Ridge National Laboratory (1970)
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.