Hastelloy C-22 Hex flange bolts
ISO 4162ASTM B574
An integral flange spreads the bearing load of a Hastelloy C-22 bolt. Corrosion resistance across oxidising and reducing process exposures addresses the service exposure; plain or serrated seating determines contact with the supported surface.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed
EN 10204 3.1 MTC + heat-number traceability
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
Integral flange
Use on mounting brackets and equipment covers to distribute head load over a wider seat and reduce loose parts during assembly. The flange needs a flat landing clear of nearby walls and radii.
Plain bearing face
Choose a plain underside for finished or coated seats where teeth would mark the surface. It also permits controlled sliding at the head-seat interface during tightening.
Flange vs loose washer
An integral flange speeds repeated assembly by keeping the bearing surface with the bolt. Retain a separate washer when the joint needs a replaceable wear face or a specifically hardened bearing layer.
- Head
- Hex drive · Integral flange
- Bearing face
- Plain or specified surface profile
- Length basis
- Under flange
- Threads
- Metric · UNC · UNF · UNJ
- Final condition
- Solution annealed
- Inspection
- Thread gauges · Head and shank dimensions
Manufacturing route
CNC machining suits samples and small lots. Cold heading or hot forging is selected for volume production according to alloy formability, head section and size.
Heat treatment & final condition
The final annealed or specified strengthened condition is linked to the lot; an aging treatment is not assumed for a solid-solution alloy.
Finished geometry
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where C-22 fits — and what matters
Chemical Processing
Mixer drives and process-equipment bracketsHastelloy C-22 hex flange bolts clamp mixer drives and process-equipment brackets through an integral flange that spreads head load over the mounting face. Process liquid can remain at the contact after the exposed surface drains.
Pumps, Valves & OEM
Actuator mounts and pump baseplatesHastelloy C-22 hex flange bolts clamp actuator mounts and pump baseplates through an integral flange that spreads head load over the mounting face. Repeated maintenance makes fit, engagement and access part of the component specification.
Mining & Mineral Processing
Leach-equipment and dosing-skid supportsHastelloy C-22 hex flange bolts clamp leach-equipment and dosing-skid supports through an integral flange that spreads head load over the mounting face. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Same hex flange bolt. Different material priorities.
Hastelloy C-22 material dataHastelloy C-276
Resistance to chemically aggressive, mixed process streams.
- Connection priority
- Clamp load spread over the integral flange
- Process liquid and shutdown chemistry
- C-276 is selected for its nickel–chromium–molybdenum–tungsten chemistry. Residual product, cleaning liquid and oxidising contamination can expose a sheltered connection differently from the main flow. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
Inconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Clamp load spread over the integral flange
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
Titanium Grade 2
Low mass, corrosion resistance and commercially pure titanium formability.
- Connection priority
- Clamp load spread over the integral flange
- Commercially pure titanium
- Grade 2 favours corrosion resistance and forming characteristics over the higher strength of Grade 5. Mating-metal contact, surface condition and assembly friction remain part of the connection design. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N06022 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Thread gauges · Head and shank dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your C-22 hex flange bolt enquiry
Questions about C-22 hex flange bolts
Can the flange replace a separate washer?
Only when its bearing footprint and the supported surface meet the assembly requirement. A serrated seat can damage a coating, while a thin or slotted member may need a different bearing arrangement.