Nickel Alloy N10624-SA (Solution annealed)
Heat-treated state · default condition
UNS N10624
Standard supply condition for plate, sheet, tube and forgings in corrosive-service equipment; maximum ductility and corrosion resistance.
Values for the SA condition
Other N10624 tempers and conditions
N10624 is listed in 5 conditions; see the grade overview at N10624.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished and solution annealed | Heavy sections: hot-rolled/forged then annealed; slightly lower strength and coarser grain than sheet product. | 385 | 860 | 50 | 13 HRC | 1.3 % IACS |
SADefaultThis page Solution annealed | Standard supply condition for plate, sheet, tube and forgings in corrosive-service equipment; maximum ductility and corrosion resistance. | 400 | 890 | 55 | 210 HB | — |
As-welded deposit | Property basis for weld metal / weldments not post-weld solution annealed; expect lower ductility and HAZ sensitisation risk in reducing acids. | 450 | 820 | 35 | 20 HRC | 1.2 % IACS |
Cold drawn | Choose for close-tolerance bar, fasteners and instrument tubing where higher yield strength and better surface finish are needed. | 700 | 1,000 | 30 | 25 HRC | 1.3 % IACS |
Heavily cold worked / hard temper strip and wire | Springs, wire and hard strip where strength governs; ductility and corrosion margin are reduced, stress-relief recommended. | 950 | 1,200 | 12 | 33 HRC | 1.3 % IACS |
What is N10624-SA?
N10624-SA is N10624 heat treated to SA — standard supply condition for plate, sheet, tube and forgings in corrosive-service equipment; maximum ductility and corrosion resistance. N10624-SA has a yield strength of 400 MPa (58 ksi) and a tensile strength of 890 MPa (129 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 216 GPa (31.3 Msi). N10624-SA has a density of 9.22 g/cm³ (0.333 lb/in³), heavier than 97% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Advantages
- Ductile — tolerates forming and impact — 55%, better than 93% of nickel alloy grades
- Good corrosion resistance — 88/100, better than 81% of nickel alloy grades
Limitations
- Limited service temperature — 480°C (896 °F), worse than 82% of nickel alloy grades
N10624-SA properties
Typical room-temperature values for N10624-SA; 11 are specific to this condition. Other listed values are N10624 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
N10624-SA has a density of 9.22 g/cm³ (0.333 lb/in³), heavier than 97% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Mechanical14
N10624-SA has a yield strength of 400 MPa (58 ksi) and a tensile strength of 890 MPa (129 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 216 GPa (31.3 Msi).
Thermal6
N10624-SA is rated for continuous service to 480°C (896 °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 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
N10624-SA conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 81% of nickel alloy grades.
Sustainability4
Producing a kilogram of N10624-SA takes about 145 MJ of energy and emits 13.5 kg of CO₂ — less than 77% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability8
N10624-SA's machinability is poor (20/100, better than 53% of nickel alloy grades); weldability good (65/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with N10624-SA
Is N10624 easy to machine?
Treat like Hastelloy B-2/B-3: rigid setup, positive-rake carbide, slow speeds (15–25 m/min), heavy positive feed to cut below the work-hardened skin, flood coolant, never dwell.
Can N10624 be welded?
GTAW/GMAW/SMAW with matching Ni-Mo filler, low heat input, interpass <95 °C, no preheat; post-weld solution anneal + water quench if the weldment sees hot reducing acid.
Can N10624 be formed, bent or molded?
Cold forms well in the annealed condition but needs ~2× the force of austenitic stainless; hot work 900–1180 °C followed by rapid cooling, and re-anneal after >10–15 % cold work.
What surface finishes work on N10624?
Pickle in HF-HNO₃-free nitric-free acid blends carefully (nitric attacks this alloy) — prefer mechanical descaling, grinding and electropolishing; no anodising, no plating normally required.
N10624 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 |
|---|---|---|
| Moprincipal alloying element for reducing-acid resistance | 26 – 30 | 28 |
| Crsmall addition for tolerance of oxidising contaminants | 0.5 – 3 | 1.5 |
| Fe | ≤ 3 | 1.5 |
| Co | ≤ 1 | 0.3 |
| Mn | ≤ 1 | 0.3 |
| Sikept low to avoid intermetallic precipitation | ≤ 0.1 | 0.05 |
| Clow-carbon type for intergranular corrosion resistance | ≤ 0.01 | 0.01 |
| W | ≤ 1 | 0.2 |
| Al | ≤ 0.5 | 0.2 |
| P | ≤ 0.03 | — |
| S | ≤ 0.01 | — |
| Ni | balance | — |
N10624-SA — frequently asked
What is N10624-SA used for?
N10624-SA is typically used for hydrochloric acid handling equipment, reducing-acid process vessels and chemical processing piping and fittings. In short: reducing-acid Ni-Mo alloy; high ductility, low machinability; not for oxidizing media.
What is the yield strength of N10624-SA?
N10624-SA has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 890 MPa (129 ksi) — stronger than 56% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is N10624-SA easy to machine?
Not especially — machinability is rated poor (20/100, better than 53% of nickel alloy grades). Treat like Hastelloy B-2/B-3: rigid setup, positive-rake carbide, slow speeds (15–25 m/min), heavy positive feed to cut below the work-hardened skin, flood coolant, never dwell.
Can N10624-SA be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW/SMAW with matching Ni-Mo filler, low heat input, interpass <95 °C, no preheat; post-weld solution anneal + water quench if the weldment sees hot reducing acid.
What surface finishes work on N10624-SA?
Pickle in HF-HNO₃-free nitric-free acid blends carefully (nitric attacks this alloy) — prefer mechanical descaling, grinding and electropolishing; no anodising, no plating normally required.
Can N10624-SA be formed, bent or molded?
Cold forms well in the annealed condition but needs ~2× the force of austenitic stainless; hot work 900–1180 °C followed by rapid cooling, and re-anneal after >10–15 % cold work.
What is the maximum service temperature of N10624-SA?
N10624-SA is rated for continuous use to about 480°C (896 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between N10624-SA and N10624 CW-H?
SA is the default condition — standard supply condition for plate, sheet, tube and forgings in corrosive-service equipment; maximum ductility and corrosion resistance. CW-H: springs, wire and hard strip where strength governs; ductility and corrosion margin are reduced, stress-relief recommended. Yield strength is 400 MPa in SA versus 950 MPa in CW-H.
Sources
- ASTM B333 — Ni-Mo Alloy Plate, Sheet and Strip — ASTM International (2018)
- ASTM B335 — Ni-Mo Alloy Rod — ASTM International (2020)
- ASTM B622 / B619 — Ni-Mo Alloy Seamless and Welded Pipe & Tube — ASTM International (2017)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Specialty Handbook: Nickel, Cobalt and Their Alloys — ASM International (2000)
- Ni-Mo (Hastelloy B-family) corrosion alloy datasheets — Haynes International / VDM Metals (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.