Hastelloy® C-276 (UNS N10276)
Nickel-Molybdenum-Chromium Alloy
What Is Hastelloy® C-276
Hastelloy® C-276 (UNS N10276) is a nickel-molybdenum-chromium-tungsten alloy engineered for severe corrosion environments. It is one of the most widely specified “go-to” corrosion-resistant alloys in the world because of its versatility across oxidizing, reducing, mixed-acid, and chloride-bearing media.
Hastelloy C-276 delivers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, along with strong performance against ferric and cupric chlorides, hot contaminated organic and inorganic media, chlorine, and seawater.
Hastelloy® C-276 Standards and Designations
Common Names & Cross-References
Hastelloy C-276 is searched and specified under many names. All of the following refer to UNS N10276
Designation | Value |
|---|---|
Trade Names | Hastelloy® C-276, Alloy C-276, C276, Hastelloy C |
UNS | N10276 |
German (W.Nr. / DIN) | 2.4819 — NiMo16Cr15W |
British Standard | BS 3072 NA17 |
French (AFNOR) | NC17D |
EN (Europe) | NW0276 / NiMo16Cr16W |
Properties of Hastelloy® C-276
Hastelloy C-276 Chemical Composition
|
Element |
Composition (%) |
|---|---|
|
Nickel (Ni) |
Balance |
|
Chromium (Cr) |
14.5 – 16.5 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Iron (Fe) | 4.0 – 7.0 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 1.0 max |
| Vanadium (V) | 0.35 max |
| Silicon (Si) | 0.08 max |
| Carbon (C) | 0.010 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
Typical Mechanical Properties (Annealed)
|
Property |
Typical |
Spec Min |
|---|---|---|
| Tensile Strength | 115 ksi (793 MPa) | 100 ksi |
| Yield Strength (0.2%) | 55 ksi (380 MPa) | 41 ksi |
| Elongation (in 2 in.) | 60% | 40% |
| Hardness | Rockwell B 87 | B 100 max |
About Hastelloy® C-276
Key Features & Advantages
- Excellent resistance to oxidizing and reducing chemical environments
- Outstanding performance in chloride-bearing service, including hot chloride solutions
- Strong resistance to pitting, crevice corrosion, and stress corrosion cracking
- Reliable performance in mixed-acid and contaminated media
- Excellent fabrication and forming characteristics
Common Applications of Hastelloy C-276
- Chemical processing reactors, scrubbers, and absorbers
- Heat exchangers and condenser components
- Piping, valves, and fittings in chloride service
- Flue gas desulfurization (FGD) and pollution control systems
- Pulp and paper chemical handling systems
- Acid production and waste treatment equipment
- Sour gas and oil & gas service per NACE MR0175
Primary Markets Served
- Chemical Processing
- Pollution Control & Environmental
- Pulp & Paper
- Oil & Gas (sour service)
- Power Generation
When to Specify Hastelloy C-276
Choose C-276 when your service environment combines chlorides with oxidizing or reducing chemistry, or when you need an alloy that performs reliably in mixed-acid service:
- C-276 vs. 316L stainless — C-276 outperforms 316L in any chloride-bearing or aggressive acid service. Specify C-276 when 316L is pitting or cracking.
- C-276 vs. Hastelloy C-22 — C-22 has higher chromium and is generally better in oxidizing acids; C-276 is better in reducing acids and mixed media. Many specs allow either.
- C-276 vs. Inconel 625 — C-276 typically outperforms 625 in localized chloride corrosion. 625 has higher strength and better high-temperature performance.
- C-276 vs. Alloy 20 — C-276 is the upgrade when sulfuric acid service involves chlorides or higher temperatures.
Why Source 21?
- ISO 9001-certified quality system with full chemistry and mechanical traceability on every shipment
- Multi-million dollar national inventory across stainless, nickel alloys, copper, and brass
- Strong domestic and international mill relationships, including premium specialty mill partnerships
- In-house slitting, edging, leveling, and cut-to-length capabilities
- Contract programs, blanket orders, and vendor-managed inventory (VMI) for production accounts
- Responsive technical support for tight-tolerance and certification-driven work
Request A Quote
Contact Source 21 today for Hastelloy C-276 pricing, availability, and processing options. Our team responds quickly, asks the right questions, and gets you accurate quotes on real material — not vague placeholders.
Call 631-821-1101 or request a quote online to get started.