Hastelloy C-276 (UNS N10276)
Hastelloy C-276 (UNS N10276) — One of the most corrosion-resistant alloys for severe chemical service.
| UNS number | N10276 |
| Material family | Nickel-moly-chromium |
| Product specifications | B564, B366, B622 |
| Density (typical) | 8.89 g/cm³ (8890 kg/m³) |
| Weight of 6" Sch 40 pipe | 32.00 kg/m |
Specifications by product form
One alloy is ordered under different ASTM/ASME numbers depending on form: forged flanges and fittings, wrought buttweld fittings, and pipe or tube. For Hastelloy C-276 the usual specifications are B564, B366, B622. Quote both the specification and the UNS number on purchase orders to avoid ambiguity.
Chemical and mechanical limits differ between these specifications — always check the edition of the standard named on your order and the mill test certificate.
Chemical composition & mechanical properties
| Property | Alloy C-276 (Hastelloy) |
|---|---|
| Family | Nickel-moly-chromium |
| UNS | N10276 |
| EN / W.Nr | 2.4819 NiMo16Cr15W |
| Basis spec | ASTM B564 |
| Density g/cm³ | 8.89 |
| Chemical composition, % | |
| C | 0.010 |
| Mn | 1.0 |
| P | 0.04 |
| S | 0.03 |
| Si | 0.08 |
| Cr | 14.5–16.5 |
| Ni | bal |
| Mo | 15.0–17.0 |
| V | 0.35 |
| W | 3.0–4.5 |
| Fe | 4.0–7.0 |
| Co | 2.5 |
| Mechanical properties (min) | |
| Tensile strength | 690 MPa (100 ksi) |
| Yield strength (0.2%) | 283 MPa (41 ksi) |
| Elongation | 40% |
| Hardness (max) | – |
| PREN (min, from spec) | 64.0 |
Single values are maximums; ranges are min–max; "bal" = balance. Limits are typical of the basis specification for that product form — forgings, pipe and fittings specifications differ slightly. Always check the exact specification, edition and the mill test certificate.
Frequently asked questions
What is the UNS number of Hastelloy C-276?
N10276.
Which ASTM specifications cover Hastelloy C-276?
B564, B366, B622.
What is the density of Hastelloy C-276?
About 8.89 g/cm³ (8890 kg/m³), used for weight calculations.
Last updated 2026-11-02