Hastelloy C-22 Double-End Studs
ASME B18.31.2 · DIN 938 / 939ASTM B574 — rod / bar
Hastelloy C-22 double-end studs for acid-process covers and valve bonnets, with independently defined body-end engagement and nut-end projection.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed
EN 10204 3.1 MTC + heat-number traceability
Hastelloy C-22 in this connection
A nickel-chromium-molybdenum alloy with resistance across many oxidising and reducing process environments.
- Connection
- Chemical valve bonnets & removable reactor covers
- Critical dimensions
- Overall length · central grip · each end length and fit
Which standard is on your order?
Raw Material Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Solution annealedSolution annealing dissolves detrimental precipitates, followed by rapid cooling to preserve corrosion resistance.
What we can make in Hastelloy C-22
Forms & dimension guide
Clamping stud
Use for through-bolted covers and housings with access to both nuts. The plain grip spans the joint; independently sized threaded ends accommodate unequal nut-side clearances.
Tap-end stud
Use on valve bonnets and machine housings opened repeatedly for maintenance. The insertion end remains in the body while the outer nut is removed, reducing repeated wear of the housing thread.
- Product forms
- Equal threaded ends · Unequal threaded ends · Tap-end — specified fit
- Dimensional control
- Overall length · central grip · each end length and fit
- Manufacturing
- CNC-turn the central grip and shoulders, then produce the two thread ends to their separate lengths and fits.
- Final condition
- Solution annealing establishes the specified corrosion-resistant condition; strength is not obtained by precipitation aging.
- Inspection
- Chemistry · final condition · thread inspection · specified mechanical properties
Where C-22 fits — and what matters
Chemical Processing
Chemical pump covers and reactor connectionsHastelloy C-22 double-end studs connect chemical pump covers and reactor connections through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Process liquid can remain at the contact after the exposed surface drains.
Pumps, Valves & OEM
Pump casings and valve bonnetsHastelloy C-22 double-end studs connect pump casings and valve bonnets through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Repeated maintenance makes fit, engagement and access part of the component specification.
Mining & Mineral Processing
Chemical-recovery pump and vessel coversHastelloy C-22 double-end studs connect chemical-recovery pump and vessel covers through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Same double-end stud. Different material priorities.
Hastelloy C-22 material dataHastelloy C-276
A nickel-chromium-molybdenum-tungsten alloy for severe process corrosion, including reducing acids and wet-chlorine environments.
Hastelloy C-276 Double-End StudsInconel 625
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
Inconel 625 Double-End StudsAlloy 20
Nickel, chromium and copper make Alloy 20 a useful candidate for sulfuric-acid process equipment.
Alloy 20 Double-End StudsIncoloy 925
Age-hardenable nickel alloy combines strength with corrosion resistance for specified sour-service equipment.
Incoloy 925 Double-End StudsFrom drawing to documented delivery
- 01Drawing & BOMGrade, condition and part dimensions
- 02Sample lotOptional · typically ~20 days
- 03Production & testingTypically 25–35 days
- 04Documents & dispatchHeat-linked lots and packing
Connection & acceptance
Chemical valve bonnets & removable reactor covers: Chemical mixture · cleaning changes · body-thread engagement.
Material & final condition
Solution annealing establishes the specified corrosion-resistant condition; strength is not obtained by precipitation aging.
Connection inspection
Overall length · central grip · each end length and fit. Chemistry · final condition · thread inspection · specified mechanical properties.
Build your C-22 double-end stud enquiry
Upload drawing insteadQuestions about C-22 double-end studs
Why separate the two threaded ends in a C-22 order?
Body engagement, nut travel and the unthreaded grip serve different functions. Specify both end lengths and fits so corrosion-resistant material is delivered in a stud that actually fits the cover assembly.
Technical references & photo credits
Catalogue photography shows product form. Application examples connect alloy properties to equipment duties; they are not customer installation records. Quantities, schedules and the inspection scope are confirmed in the quotation.