Nickel Alloy Hastelloy B
UNS N10001 · EN 2.4810
The original nickel-molybdenum corrosion-resistant alloy, valued for outstanding resistance to hydrochloric and other non-oxidizing reducing acids; superseded in most new designs by Hastelloy B-2 with lower carbon.
Reference datasheet — Hastelloy B 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
Hastelloy B tempers and conditions
Hastelloy B is supplied in 5 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As cast | Sand/investment cast pump and valve bodies in the Ni-Mo chemistry, supplied solution treated; lower ductility than wrought product. | 290 | 550 | 8 | 190 HB | 1.3 % IACS |
SADefault Solution annealed | Standard supply condition for plate, sheet, bar, pipe and fittings — maximum corrosion resistance and ductility. | 380 | 830 | 55 | 200 HB | — |
Hot finished | As-hot-worked heavy bar/forgings; slightly higher strength but reduced corrosion performance — anneal before aggressive acid service. | 450 | 870 | 40 | 22 HRC | 1.3 % IACS |
As-welded deposit | Weldment properties with matching filler; post-weld solution anneal is strongly recommended for HCl service because of HAZ carbide precipitation. | 450 | 760 | 30 | 215 HB | 1.3 % IACS |
Cold worked | Cold-drawn bar, wire and tube where higher strength and closer tolerance matter more than optimum corrosion resistance. | 860 | 1,100 | 18 | 30 HRC | 1.3 % IACS |
What is Hastelloy B?
The original nickel-molybdenum corrosion-resistant alloy, valued for outstanding resistance to hydrochloric and other non-oxidizing reducing acids; superseded in most new designs by Hastelloy B-2 with lower carbon. Hastelloy B has a density of 9.24 g/cm³ (0.334 lb/in³), heavier than 99% of nickel alloy grades. It melts at 1,320°C (2,408 °F). Hastelloy B has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 830 MPa (120 ksi) — weaker than 53% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 217 GPa (31.5 Msi).
What is Hastelloy B used for?
- hydrochloric acid processing equipment
- chemical reactor vessels
- pumps and valves in reducing acid service
Advantages
- Ductile — tolerates forming and impact — 55%, better than 93% of nickel alloy grades
Limitations
- Limited service temperature — 480°C (896 °F), worse than 82% of nickel alloy grades
Hastelloy B properties
Typical room-temperature values for Hastelloy B-SA; bars are the position among nickel alloy grades.
Physical3
Hastelloy B has a density of 9.24 g/cm³ (0.334 lb/in³), heavier than 99% of nickel alloy grades. It melts at 1,320°C (2,408 °F).
Mechanical14
Hastelloy B has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 830 MPa (120 ksi) — weaker than 53% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 217 GPa (31.5 Msi).
Thermal6
Hastelloy B is rated for continuous service to 480°C (896 °F). It conducts heat at 11.1 W/m·K (6.41 BTU/hr·ft·°F), worse than 54% of nickel alloy grades. Thermal expansion is 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
Hastelloy B conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 67% of nickel alloy grades.
Sustainability4
Producing a kilogram of Hastelloy B takes about 165 MJ of energy and emits 13 kg of CO₂ — more than 54% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Hastelloy B's machinability is poor (22/100, better than 64% of nickel alloy grades); weldability good (55/100); formability good (60/100).
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. Hastelloy B is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Hastelloy B
Is Hastelloy B easy to machine?
Machine like an annealed austenitic Ni-Mo alloy: rigid setup, positive-rake sharp carbide, slow speeds (~10–20 m/min carbide turning), heavy positive feeds to cut under the work-hardened layer, flood sulfochlorinated coolant.
Can Hastelloy B be welded?
GTAW/GMAW/SMAW with matching ERNiMo-1/ENiMo-1, low heat input, no preheat, interpass under 100 °C; solution anneal at ~1150 °C and water quench after welding for HCl service to avoid HAZ carbide and knife-line attack.
Can Hastelloy B be formed, bent or molded?
Cold forms readily but work-hardens fast — use ~50 % more power than 304, generous radii and intermediate anneals; hot work 1180–950 °C then water quench, never finish below ~900 °C.
Hastelloy B 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 corrosion-resisting element in reducing acids | 26 – 30 | 28 |
| Fe | 4 – 7 | 5 |
| Crresidual only; no oxidizing-media resistance | ≤ 1 | 0.5 |
| Co | ≤ 2.5 | |
| Chigher than B-2/B-3; source of HAZ carbide precipitation | ≤ 0.05 | 0.03 |
| Mn | ≤ 1 | |
| Si | ≤ 1 | |
| V | 0.2 – 0.4 | 0.3 |
| P | ≤ 0.03 | |
| S | ≤ 0.03 | |
| Nibalance, ~62–66 % | balance |
What surface finishes work on Hastelloy B?
Pickle in HF/HNO3 sparingly (nitric attacks the alloy — prefer grit blast plus HCl-free descale), then mechanically polish or electropolish; no anodizing, and no coating is normally needed.
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 Hastelloy B in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N10001
- EN / DIN / Werkstoff-Nr.
- 2.4810
How much does Hastelloy B cost?
Hastelloy B 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.
Hastelloy B — frequently asked
What is Hastelloy B used for?
Hastelloy B is typically used for hydrochloric acid processing equipment, chemical reactor vessels and pumps and valves in reducing acid service. In short: benchmark HCl-resistant alloy; superseded by Hastelloy B-2; no oxidizing-media service.
What is the yield strength of Hastelloy B?
Hastelloy B has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 830 MPa (120 ksi) — weaker than 53% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Hastelloy B easy to machine?
Not especially — machinability is rated poor (22/100, better than 64% of nickel alloy grades). Machine like an annealed austenitic Ni-Mo alloy: rigid setup, positive-rake sharp carbide, slow speeds (~10–20 m/min carbide turning), heavy positive feeds to cut under the work-hardened layer, flood sulfochlorinated coolant.
Can Hastelloy B be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW/SMAW with matching ERNiMo-1/ENiMo-1, low heat input, no preheat, interpass under 100 °C; solution anneal at ~1150 °C and water quench after welding for HCl service to avoid HAZ carbide and knife-line attack.
What surface finishes work on Hastelloy B?
Pickle in HF/HNO3 sparingly (nitric attacks the alloy — prefer grit blast plus HCl-free descale), then mechanically polish or electropolish; no anodizing, and no coating is normally needed.
Can Hastelloy B be formed, bent or molded?
Cold forms readily but work-hardens fast — use ~50 % more power than 304, generous radii and intermediate anneals; hot work 1180–950 °C then water quench, never finish below ~900 °C.
What is the maximum service temperature of Hastelloy B?
Hastelloy B 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 Hastelloy B-SA and Hastelloy B-CW?
SA is the default condition — standard supply condition for plate, sheet, bar, pipe and fittings — maximum corrosion resistance and ductility. CW: cold-drawn bar, wire and tube where higher strength and closer tolerance matter more than optimum corrosion resistance. Yield strength is 380 MPa in SA versus 860 MPa in CW.
How much does Hastelloy B cost?
Hastelloy B 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 B333 — Ni-Mo Alloy Plate, Sheet and Strip (UNS N10001) — ASTM International (2018)
- ASTM B335 — Nickel-Molybdenum Alloy Rod — ASTM International (2018)
- ASTM B622 / B619 — Ni-Mo Alloy Seamless and Welded Pipe & Tube — ASTM International (2017)
- ASTM A494 — Castings, Nickel and Nickel Alloy (grade N-12MV) — ASTM International (2018)
- Hastelloy B / B-2 alloy technical data — Haynes International (2020)
- 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)
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.