Materials · Hastelloy
Hastelloy B3 fasteners
HAGUE FASTENERS makes Hastelloy B3 fasteners to order: bolts, studs, nuts and socket screws in Hastelloy B3, the improved nickel-molybdenum alloy for hydrochloric acid and other reducing media, made to your drawing in Willenhall.
UNS N10675
Also W.Nr 2.4600 and NiMo29Cr
27 to 32% Mo
Molybdenum for reducing acids
890 MPa
Typical tensile strength
1 to 500
Prototypes to batches of several hundred
About the alloy
The improved B-type alloy
HAGUE FASTENERS makes Hastelloy B3 fasteners in the UK for hydrochloric acid and other strongly reducing chemicals. B3 is a nickel-molybdenum alloy developed from Hastelloy B2, with better thermal stability during fabrication, and it can be used in all applications that previously called for B2.
Like B2, it should not be used where ferric or cupric salts are present, as these salts can cause rapid corrosion failure. They may form when hydrochloric acid comes into contact with iron or copper, so the rest of the system matters as much as the fastener.
At a glance
- Nickel-molybdenum alloy, 65% nickel min.
- Replaces B2 in hydrochloric acid and reducing duty
- Better thermal stability during fabrication
- Avoid ferric or cupric salts
Composition
Hastelloy B3 chemical composition
Percentage by weight. Other: Ni + Mo 94.00 to 98.00.
| Element | Min % | Max % |
|---|---|---|
| Nickel (Ni) | 65.00 | – |
| Molybdenum (Mo) | 27.00 | 32.00 |
| Chromium (Cr) | 1.00 | 3.00 |
| Iron (Fe) | 1.00 | 3.00 |
| Tungsten (W) | – | 3.00 |
| Cobalt (Co) | – | 3.00 |
| Manganese (Mn) | – | 3.00 |
| Aluminium (Al) | – | 0.50 |
| Titanium (Ti) | – | 0.20 |
| Silicon (Si) | – | 0.10 |
| Carbon (C) | – | 0.01 |
| Niobium (Nb) | – | 0.20 |
| Vanadium (V) | – | 0.20 |
| Tantalum (Ta) | – | 0.20 |
| Zirconium (Zr) | – | 0.10 |
| Copper (Cu) | – | 0.20 |
| Phosphorus (P) | – | 0.030 |
| Sulphur (S) | – | 0.010 |
Properties
Mechanical properties (typical)
Typical values.
| Property | Value |
|---|---|
| Tensile strength | 890 MPa |
| Yield strength (0.2% offset) | 385 MPa |
| Elongation in 2 in (50 mm) or 4D | 60.4% |
| Reduction of area | 73% |
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 B3 equivalents and typical uses
Alternative designations
Alloy B3, UNS N10675, W.Nr 2.4600, Hastelloy B3, NiMo29Cr.
Typical applications
- Hydrochloric acid processing
- Reducing chemical environments
- Chemical process vessels, pumps and valves
- Replacement for B2 parts
What we make
Fasteners we make in Hastelloy B3
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 B3?
Hastelloy B3 is UNS N10675 and W.Nr 2.4600, also called Alloy B3 and NiMo29Cr.
Can Hastelloy B3 replace B2?
Yes. B3 is suitable for all applications that previously required B2, with better thermal stability during fabrication.
What should Hastelloy B3 fasteners not be used with?
Hastelloy B3 fasteners should not be used where ferric or cupric salts are present, because they can cause rapid corrosion failure.
Can you supply Hastelloy B3 with certificates?
Yes. We supply EN 10204 3.1 or 3.2 certificates, with PMI and independent test reports where required.
Hastelloy B3 enquiry?
Send us your drawing or specification
Tell us the sizes, quantity and documentation you need, and we will reply quickly.