Nickel Alloy Hastelloy C276
UNS N10276 · EN 2.4819, NiMo16Cr15W · GB NS3304, NS334 · also Hastelloy C-276
Hastelloy C-276 (UNS N10276, 2.4819, NS3304/NS334, NiMo16Cr15W) is a nickel-molybdenum-chromium solid-solution corrosion alloy with tungsten and very low carbon and silicon, so it can be used in the as-welded condition.
Values for the Solution Annealed condition
Hastelloy C276 tempers and conditions
Hastelloy C276 is supplied in 5 conditions, soft to hard. Solution Annealed 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 |
|---|---|---|---|---|---|---|
Solution AnnealedDefault 1120–1175 °C solution treat, rapid quench (ASTM B575/B574/B622) | Standard stocked condition for plate, sheet, tube and bar — maximum corrosion resistance and ductility for forming and welding. | 360 | 790 | 60 | 194 HB | — |
hot-rolled or forged bar and billet, as-worked (ASTM B574 hot-worked class) | Pick for large-section bar and forgings where slightly higher strength is acceptable and full solution annealing is not specified. | 400 | 800 | 50 | 17 HRC | 1.3 % IACS |
all-weld-metal properties, matching ERNiCrMo-4 / ENiCrMo-4 filler | Reference condition for weld-joint design and filler procurement; C276 is normally used as-welded without post-weld heat treatment. | 490 | 760 | 40 | 12 HRC | 1.3 % IACS |
cold-worked product given a low-temperature (≈ 480–650 °C) relief cycle | Used on cold-formed springs and tube to reduce residual stress while retaining most of the cold-work strength; avoid long holds that risk intermetallic precipitation. | 740 | 970 | 28 | 28 HRC | 1.3 % IACS |
strain-hardened bar, wire and tube (no final anneal) | Choose when higher strength and hardness are needed (springs, fasteners, precision tube) and heavy forming or maximum SCC margin is not required. | 800 | 1,030 | 25 | 30 HRC | — |
What is Hastelloy C276?
Hastelloy C-276 (UNS N10276, 2.4819, NS3304/NS334, NiMo16Cr15W) is a nickel-molybdenum-chromium solid-solution corrosion alloy with tungsten and very low carbon and silicon, so it can be used in the as-welded condition. It is the most widely specified alloy of its family, resisting wet chlorine, hypochlorite and hot contaminated acids (corrosion resistance score 95), and is supplied as plate, sheet, pipe, bar and weld filler. Yield is 360 MPa with 60% elongation and a 650 °C ceiling; machinability is poor (score 18) and price is high, so Inconel 625 is the cheaper option where oxidizing conditions dominate. Hastelloy C276 has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 88% of nickel alloy grades. It melts at 1,323°C (2,413 °F). Hastelloy C276 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 790 MPa (115 ksi) — weaker than 57% of nickel alloy grades. Elongation at break is 60% and the elastic modulus is 205 GPa (29.7 Msi).
What is Hastelloy C276 used for?
- Hot hydrochloric acid piping
- FGD scrubbers and ducting
- Pulp and paper bleach plant equipment
- Sulfuric acid heat exchangers
- Pharmaceutical reactor internals
- Sour gas wellhead components
- Waste incineration and quench equipment
Advantages
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 99% of nickel alloy grades
- Ductile — tolerates forming and impact — 60%, better than 98% of nickel alloy grades
- Good corrosion resistance — 95/100, better than 97% of nickel alloy grades
- Readily welded — 85/100, better than 83% of nickel alloy grades
- Forms and bends easily — 75/100, better than 82% of nickel alloy grades
Hastelloy C276 properties
Typical room-temperature values for Hastelloy C276-Solution Annealed; bars are the position among nickel alloy grades.
Physical3
Hastelloy C276 has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 88% of nickel alloy grades. It melts at 1,323°C (2,413 °F).
Mechanical14
Hastelloy C276 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 790 MPa (115 ksi) — weaker than 57% of nickel alloy grades. Elongation at break is 60% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
Hastelloy C276 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 10.2 W/m·K (5.89 BTU/hr·ft·°F), worse than 79% of nickel alloy grades. Thermal expansion is 11.2 µm/m·K (6.22 µin/in·°F).
Electrical3
Hastelloy C276 conducts electricity at 1.3 % IACS, worse than 83% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (95/100), better than 97% of nickel alloy grades.
Sustainability3
Producing a kilogram of Hastelloy C276 takes about 210 MJ of energy and emits 14 kg of CO₂ — more than 81% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Hastelloy C276's machinability is poor (18/100, worse than 61% of nickel alloy grades); weldability excellent (85/100); formability very good (75/100).
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 C276 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Hastelloy C276
Is Hastelloy C276 easy to machine?
Low speed, heavy positive-rake carbide or ceramic tooling, rigid setup, generous flood coolant and constant feed — the alloy work-hardens fast and will glaze if the tool dwells.
Can Hastelloy C276 be welded?
Excellent with GTAW/GMAW/SMAW using matching ERNiCrMo-4; keep heat input and interpass temperature low, no preheat, no PWHT required, and clean off all oxide/sulfur contamination first.
Can Hastelloy C276 be formed, bent or molded?
Very ductile but roughly twice the forming load of 304 stainless; cold form with generous radii and interstage anneal at 1120–1175 °C followed by rapid cooling for heavy work.
Manufacturability
The process limits FabDigit's quote engine applies to Hastelloy C276. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Poor18 / 100 |
|---|---|
| ISO material group | S.1 |
| Cutting speed (rough / finish) | 40 / 55 m/min |
| Minimum wall | 1.5 mm |
| Minimum internal radius | 2 mm |
| Drill depth limit | 3× diameter |
| Best surface (machined / polished) | Ra 1.6 / 0.8 µm |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair75 / 100 |
|---|---|
| Weldability | Better85 / 100 |
| Bendable | Yes |
Hastelloy C276 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 |
|---|---|---|
| Mo | 15 – 17 | 16 |
| Cr | 14.5 – 16.5 | 15.5 |
| Fe | 4 – 7 | 5.5 |
| W | 3 – 4.5 | 3.8 |
| Co | ≤ 2.5 | 1 |
| Mn | ≤ 1 | 0.5 |
| V | ≤ 0.35 | 0.1 |
| Si | ≤ 0.08 | 0.04 |
| C | ≤ 0.01 | 0.01 |
| P | ≤ 0.04 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Nibalance, typically 55–59 % | balance |
What surface finishes work on Hastelloy C276?
Pickle/passivate or electropolish for maximum corrosion performance; no anodizing — mechanical polishing and glass-bead blasting are common, and any weld heat tint should be removed.
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).
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Hastelloy C276 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N10276
- EN / DIN / Werkstoff-Nr.
- 2.4819NiMo16Cr15W
- GB (China)
- NS3304NS334
- Trade names
- Hastelloy C-276
How much does Hastelloy C276 cost?
Hastelloy C276 is a premium-cost nickel alloy ($$$), pricier than about 57% 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 C276 — frequently asked
What is Hastelloy C276 used for?
Hastelloy C276 is typically used for hot hydrochloric acid piping, FGD scrubbers and ducting, pulp and paper bleach plant equipment, sulfuric acid heat exchangers, pharmaceutical reactor internals and sour gas wellhead components. In short: severe-corrosion nickel alloy.
What is the yield strength of Hastelloy C276?
Hastelloy C276 has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 790 MPa (115 ksi) — weaker than 57% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Hastelloy C276 easy to machine?
Not especially — machinability is rated poor (18/100, worse than 61% of nickel alloy grades). Low speed, heavy positive-rake carbide or ceramic tooling, rigid setup, generous flood coolant and constant feed — the alloy work-hardens fast and will glaze if the tool dwells.
Can Hastelloy C276 be welded?
Yes — weldability is rated excellent (85/100). Excellent with GTAW/GMAW/SMAW using matching ERNiCrMo-4; keep heat input and interpass temperature low, no preheat, no PWHT required, and clean off all oxide/sulfur contamination first.
What surface finishes work on Hastelloy C276?
Pickle/passivate or electropolish for maximum corrosion performance; no anodizing — mechanical polishing and glass-bead blasting are common, and any weld heat tint should be removed.
Can Hastelloy C276 be formed, bent or molded?
Very ductile but roughly twice the forming load of 304 stainless; cold form with generous radii and interstage anneal at 1120–1175 °C followed by rapid cooling for heavy work.
What is the maximum service temperature of Hastelloy C276?
Hastelloy C276 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.
How much does Hastelloy C276 cost?
Hastelloy C276 is a premium-cost nickel alloy ($$$), pricier than about 57% 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.
Can FabDigit make parts in Hastelloy C276?
Yes — Hastelloy C276 is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B575 — Ni-Cr-Mo alloy plate, sheet and strip — ASTM International (2022)
- ASTM B574 — Ni-Mo-Cr alloy rod, bar and wire — ASTM International (2021)
- ASTM B622 / B619 — Ni-Cr-Mo alloy seamless and welded pipe & tube — ASTM International (2021)
- HASTELLOY C-276 alloy principal features and properties — Haynes International (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- GB/T 15007 / NS334 — SAC (2017)
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.