Materials · Nickel alloys
Hastelloy fasteners
HAGUE FASTENERS makes Hastelloy fasteners to order: bolts, studs, nuts and machined components in Hastelloy C276, C22, C4, B2, B3, G30 and X, made to your drawing in our Willenhall facility from certified, traceable bar. Chosen when stainless steels and most nickel alloys would corrode.
7 grades
From C276 and C22 to B2, B3, G30 and X
1 to 500
Single prototypes to batches of several hundred
3.1 / 3.2
EN 10204 certificates with full traceability
UK, EU, US
Mill origin of every bar we use
Why Hastelloy
The answer when corrosion is the main enemy
Hastelloy is a family of nickel-molybdenum and nickel-chromium-molybdenum alloys designed for the most aggressive chemical environments. Where acids, chlorides and oxidising or reducing media would attack stainless steel, Hastelloy fasteners keep a joint sound and serviceable.
HAGUE FASTENERS has machined Hastelloy for decades. It work-hardens quickly and is hard on tooling, so it rewards experience: the right speeds, tooling and thread form give a clean, accurate thread and a fastener that performs as the alloy intends.
Grades
Hastelloy grades we machine
Select a grade for its composition, properties and equivalent designations. The grade supplied always follows your specification, and we are happy to advise.
Hastelloy C276
The all-round choice for chemical process, flue gas and offshore duty. Resists pitting and stress corrosion cracking.
Hastelloy C22
Even wider resistance to oxidising and reducing media, and to pitting and crevice attack.
Hastelloy C4
Stable after welding and high temperature exposure; resists intergranular attack.
Hastelloy B2
Nickel-molybdenum alloy for hydrochloric acid and other strongly reducing environments.
Hastelloy B3
Improved B-type alloy with better thermal stability during fabrication.
Hastelloy G30
High chromium alloy for phosphoric acid and other oxidising acids.
Hastelloy X
Oxidation resistance and strength at high temperature, for furnace and combustion parts.
Choosing a grade
Matching the grade to the duty
Typical selections only. Tell us the medium, temperature and specification and we will confirm the right grade, or suggest an alternative such as Inconel, Incoloy or super duplex.
| Service environment | Grades usually considered |
|---|---|
| Mixed acids and chlorides, chemical process | C276, C22 |
| Hydrochloric acid and reducing media | B2, B3 |
| Phosphoric and oxidising acids | G30, C22 |
| Welded assemblies, high temperature exposure | C4 |
| Flue gas desulphurisation, scrubbers | C276, C22 |
| High temperature oxidation and strength | X |
What we make
Hastelloy fasteners and components
Studs and studbolts
Stud bolts, engineer studs and waisted studs
Bolts and screws
Hexagon, 12-point and special head bolts
Nuts
Hex, heavy hex and special nuts
Washers
Plain, machined and spherical washers
Socket screws
Non-standard cap, set and shoulder screws
Turned and milled parts
Machined to your drawing
Proving the material
Certified from mill to final release
Every bar comes from an approved UK, EU or US mill with its certificate, and the heat number is carried through to release. PMI and chemical analysis confirm the grade where specified, and independent UKAS-accredited testing and EN 10204 3.1 or 3.2 certificates are supplied as your order requires.
- Mill certificates and heat traceability
- PMI and chemical analysis
- Solution annealing by approved partners, with furnace charts
- Intergranular corrosion testing where specified
- Laser-marked heat codes or part numbers
Questions
Frequently asked questions
Which Hastelloy grade is best for fasteners?
Hastelloy C276 is the most widely specified grade for fasteners because it resists a very broad range of chemical environments. C22 is chosen for even more aggressive mixed acids, and B2 or B3 for hydrochloric acid. We make all of them.
Is Hastelloy better than stainless steel for bolts?
For aggressive chemicals, chlorides and acids, yes. Hastelloy resists pitting, crevice corrosion and stress corrosion cracking far better than austenitic stainless steels such as 316, but it costs more, so it is used where the duty demands it.
Can you make Hastelloy fasteners in small quantities?
Yes. We make Hastelloy parts from a single prototype or breakdown replacement to batches of several hundred.
Do you hold Hastelloy bar in stock?
We hold considerable stocks of superalloy bar from UK, EU and US mills, so many orders can start straight away.
What is the equivalent of Hastelloy C276?
Hastelloy C276 is also known as Alloy C276, UNS N10276 and W.Nr 2.4819.
Useful tools
Free engineering tools
- Material equivalents finder: find the EN, UNS, ASTM, BS and JIS equivalents of a grade, such as 1.4462 or 316.
- Galvanic corrosion checker: check the corrosion risk when joining dissimilar metals.
- Bar weight calculator: weight of round, square and hexagon bar and plate per metre and per piece.
Free to use, no sign-up. See all our engineering tools.
Hastelloy enquiry?
Send us your drawing or specification
Tell us the grade, sizes, quantity and documentation you need and we will come back to you quickly.