Materials · Hastelloy
Hastelloy C276 fasteners
HAGUE FASTENERS makes Hastelloy C276 fasteners to order: bolts, studs, nuts and machined parts in Hastelloy C276, the most widely specified nickel-chromium-molybdenum alloy for aggressive chemicals, made to your drawing in Willenhall.
UNS N10276
Also W.Nr 2.4819 and Alloy C276
15 to 17% Mo
Molybdenum for pitting and crevice resistance
758 MPa
Typical tensile strength, annealed
1 to 500
Prototypes to batches of several hundred
About the alloy
The all-round alloy for corrosive service
HAGUE FASTENERS makes Hastelloy C276 fasteners in the UK for chemical, petrochemical, flue gas and offshore plant. C276 has excellent resistance to pitting, stress corrosion cracking and oxidising atmospheres up to 1900°F (about 1040°C), and resists a very wide range of chemical environments.
It is the grade engineers reach for when a joint sees chlorides, acids, halide catalysts or wet chlorine and stainless steel is no longer enough. We hold superalloy bar from UK, EU and US mills, so many C276 orders can start straight away.
At a glance
- Nickel-chromium-molybdenum-tungsten alloy
- Resists pitting and stress corrosion cracking
- Wide resistance to oxidising and reducing media
- Commonly specified for flue gas desulphurisation
Composition
Hastelloy C276 chemical composition
Percentage by weight. Other elements: V 0.35 max.
| Element | Min % | Max % |
|---|---|---|
| Nickel (Ni) | Bal. | – |
| Chromium (Cr) | 14.50 | 16.50 |
| Molybdenum (Mo) | 15.00 | 17.00 |
| Manganese (Mn) | – | 1.00 |
| Iron (Fe) | 4.00 | 7.00 |
| Silicon (Si) | – | 0.08 |
| Carbon (C) | – | 0.01 |
| Phosphorus (P) | – | 0.04 |
| Sulphur (S) | – | 0.03 |
| Cobalt (Co) | – | 2.50 |
| Tungsten (W) | 3.00 | 4.50 |
Properties
Mechanical properties (typical, annealed)
Typical values in the annealed condition. Hardness on the Rockwell B scale.
| Property | Value |
|---|---|
| Tensile strength | 758 MPa |
| Yield strength (0.2% offset) | 363 MPa |
| Elongation in 2 in (50 mm) or 4D | 62% |
| Hardness | B88 |
This data is for general information only and may change without notice. HAGUE FASTENERS LIMITED believes it to be accurate but gives no warranty as to its accuracy or completeness and accepts no liability for its use. Actual properties may vary, and nothing here guarantees suitability for a particular use.
Equivalents and applications
Hastelloy C276 equivalents and typical uses
Alternative designations
Alloy C276, W.Nr 2.4819, UNS N10276.
Typical applications
- Organic chloride processes in chemical and petrochemical plant
- Processes using halide or acid catalysts
- Pulp and paper digesters and bleach areas
- Scrubbers and ducting for flue gas desulphurisation
- Pharmaceutical and food processing equipment
What we make
Fasteners we make in Hastelloy C276
Certification and testing
Certified, traceable and tested
Bar comes from approved UK, EU or US mills, with heat numbers carried through to release. Testing is by independent UKAS-accredited laboratories, with EN 10204 3.1 or 3.2 certificates as required. See quality and testing.
- Mill certificates and heat traceability
- PMI and chemical analysis
- Solution annealing by approved partners, with furnace charts
- Laser-marked heat codes or part numbers
Questions
Frequently asked questions
What is the equivalent of Hastelloy C276?
Hastelloy C276 is UNS N10276 and W.Nr 2.4819, also known as Alloy C276.
Is Hastelloy C276 magnetic?
No. Hastelloy C276 is a nickel-based alloy with an austenitic structure and is non-magnetic.
Why use Hastelloy C276 fasteners instead of 316 stainless?
Hastelloy C276 fasteners resist pitting, crevice corrosion and stress corrosion cracking in chlorides and acids that would attack 316. They cost more, so they are used where the duty needs them.
Can you make Hastelloy C276 studs to ASTM B574?
Yes. We make C276 studs, bolts and nuts from bar to the standard you specify, including ASTM B574, with certificates and test reports.
Hastelloy C276 enquiry?
Send us your drawing or specification
Tell us the sizes, quantity and documentation you need, and we will reply quickly.