[ Material Hub ]
Hastelloy C-22 Fasteners
Patriot Bolt machines Hastelloy C-22 fasteners from certified ASTM B574 bar (UNS N06022). C-22 is a nickel-chromium-molybdenum-tungsten alloy with about 22% chromium, chosen for oxidizing and mixed acids and for resistance to pitting and crevice corrosion.
This page brings together the C-22 fasteners we make, the bar property limits, and how C-22 compares with other nickel and corrosion-resistant alloys.
[ Quick Specs ]
Hastelloy C-22 at a Glance
- Material
- Hastelloy C-22, UNS N06022, W.Nr. 2.4602
- Bar specification
- ASTM B574 / ASME SB574
- Strength
- 100 ksi min tensile, 45 ksi min yield (solution annealed)
- Key elements
- 20–22.5% Cr, 12.5–14.5% Mo, 2.5–3.5% W
- Products
- Stud bolts, heavy hex nuts, hex cap screws, socket head cap screws
Hastelloy C-22 Fasteners We Machine
Choose a product to see its standards and options. Every order ships with mill test reports traceable to the heat.
Hastelloy C-22 Stud BoltsFull C-22 page
Hastelloy C-22 Heavy Hex NutsMatching nut
C-22 Hex Cap ScrewsMade in C-22
C-22 Socket Head Cap ScrewsMade in C-22Hastelloy C-22 Mechanical Properties
| Specification and condition | Tensile, min | Yield (0.2%), min | Elongation, min |
|---|---|---|---|
| ASTM B574, solution annealed | 100 ksi | 45 ksi | 45% |
Full chemistry is on the Hastelloy C-22 stud bolts page.
C-22 vs. Other Nickel and Corrosion-Resistant Alloys
| Grade | Strength, min (tensile / yield) | Typical use |
|---|---|---|
| Hastelloy C-22 (B574, annealed) | 100 / 45 ksi | Oxidizing and mixed acids; pitting and crevice corrosion |
| Hastelloy C-276 (B574, annealed) | 100 / 41 ksi | Severe reducing acids, wet chlorine and sour service |
| Inconel 625 (B446 Grade 1, annealed) | 120 / 60 ksi | Seawater, subsea and acid service |
| Incoloy 825 (B425, annealed) | 85 / 35 ksi | Sulfuric and phosphoric acid; seawater |
| 316 stainless (A193 B8M Class 1) | 75 / 30 ksi | General corrosion resistance; mild chemicals |
Compare all grades in the Fastener Materials Matrix.
Hastelloy C-22 Fastener FAQ
What is Hastelloy C-22 used for?
Chemical processing, pollution control and pharmaceutical service involving oxidizing or mixed acids and chlorides, where pitting and crevice corrosion are the main risks.
Which C-22 fasteners does Patriot Bolt make?
We machine C-22 stud bolts, heavy hex nuts, hex cap screws and socket head cap screws, as well as custom parts made to your drawing.
How does C-22 compare with C-276?
C-22 has more chromium and handles oxidizing media and pitting better. C-276 has more molybdenum and is often chosen for strongly reducing acids.
Do C-22 fasteners come with certifications?
Yes. Patriot Bolt is ISO 9001:2015 certified, and every C-22 order includes mill test reports traceable to the heat and a certificate of conformance to your purchase order.
Request a Quote
Send us the product, size, specification and quantity, or upload your drawing. Call (281) 581-0176 or request a quote.