Nickel Alloy N30C
ASTM A494 N30C
N30C is the cast counterpart of the Ni-Mo-Cr Hastelloy N family, ordered to ASTM A494 as UNS N30002 in sand or investment cast form.
Reference datasheet — N30C 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 SA condition
N30C tempers and conditions
N30C is supplied in 3 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault 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?
N30C is the cast counterpart of the Ni-Mo-Cr Hastelloy N family, ordered to ASTM A494 as UNS N30002 in sand or investment cast form. Solution-annealed castings give 300 MPa yield, 550 MPa tensile and 15% elongation at 195 HB (92 HRB), with service to 760 °C and a corrosion resistance rating of 88 in molten salt and hot reducing chemical environments. Machinability is low (rating 20) and the long freezing range needs generous risering or HIP for pressure-tight parts. For general hot chloride duty a cast Ni-Cr-Mo C-type alloy is the usual alternative. N30C 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). N30C 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).
What is N30C used for?
- molten salt handling components
- high-temperature chemical fittings
- corrosion-resistant valve bodies
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 properties
Typical room-temperature values for N30C-SA; bars are the position among nickel alloy grades.
Physical3
N30C 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 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 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 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 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'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. 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. N30C is highlighted; hover a dot for its name, or open the interactive family chart.
Working with N30C
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.
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 |
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).
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 N30C in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- A494 N30C
- Similar grades
- N30002
How much does N30C cost?
N30C 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.
N30C — frequently asked
What is N30C used for?
N30C 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?
N30C 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 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 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?
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 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?
N30C 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.
How much does N30C cost?
N30C 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
- 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; 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.